Supports positive and negative power receiving circuits and electronic atomization terminals

Abstract

The present application discloses a power receiving working circuit and an electronic atomization terminal that support positive and negative connection. The power receiving end of the power receiving working circuit is used to supply power to the power supply end of the power supply device, and the power receiving working circuit is electrically connected to the load; the power receiving working circuit includes a first diode drive circuit, a second diode drive circuit, and an operational amplifier control circuit; the first diode drive circuit and the second diode drive circuit are both connected to the operational amplifier control circuit; the operational amplifier control circuit is used to control the first diode drive circuit, the second diode drive circuit and the load to form an electrical path when the power supply device is forward connected to the power receiving working circuit and when the power supply device is reversely connected to the power receiving working circuit, so that the power supply device supplies power to the load through the power receiving working circuit.

Description

Technical Field

[0001] The present application relates to the technical field of electronic cigarettes, and specifically to a power receiving circuit and an electronic atomization terminal that support forward and reverse connection. Background Art

[0002] E-cigarettes are electronic products that mimic cigarettes, transforming nicotine and other substances into vapor through atomization and other methods for users to inhale. Typically, an e-cigarette consists of a cartridge containing a nicotine solution and a pipe. The pipe powers the cartridge, converting the liquid nicotine into vapor, giving the user a similar smoking sensation and a "puffing and exhaling" experience.

[0003] At present, in the e-cigarette industry, the connection methods between the cartridge and the cigarette rod include multi-line type. The cartridge chip in the cartridge generally uses a single-line communication chip or a two-line communication chip. The connection method has certain standards for the design of the power supply communication pins and logic levels. Before officially powering the cartridge or the load used for atomization, the cartridge and the cigarette rod often need to run the built-in program of the chip to repeatedly query and confirm the plug-in status of the interface, which cannot meet the plug-and-play power supply requirements after plugging in. In order to prevent damage to the power circuit, the cigarette rod is specifically prohibited from being reversely connected, affecting the user experience. Summary of the Invention

[0004] This application discloses a power receiving working circuit and an electronic atomization terminal that supports positive and negative connection. The specific technical solutions are as follows:

[0005] A power receiving working circuit that supports forward and reverse connection, wherein the power receiving end of the power receiving working circuit is used to supply power to the power supply end of the power supply device, and the power receiving working circuit is electrically connected to the load; the power receiving working circuit includes a first diode drive circuit, a second diode drive circuit, and an operational amplifier control circuit; the first diode drive circuit and the second diode drive circuit are both connected to the operational amplifier control circuit; the operational amplifier control circuit is used to control the first diode drive circuit, the second diode drive circuit, and the load to form an electrical path when the power supply device is forward connected to the power receiving working circuit and when the power supply device is reversely connected to the power receiving working circuit, so that the power supply device supplies power to the load through the power receiving working circuit.

[0006] Furthermore, the power receiving end of the power receiving working circuit includes a first power receiving end and a second power receiving end, and the power supply end of the power supply device includes a first power supply end and a second power supply end; the operational amplifier control circuit is used to, when the power supply device is forward connected to the power receiving working circuit, sequentially determine the flow direction of the current in the diode provided in the first diode drive circuit and the diode provided in the second diode drive circuit by processing the electrical signal provided by the first power supply end of the power supply device, so as to apply the electrical signal provided by the first power supply end of the power supply device to the positive input end of the load, and form an electrical path between the negative input end of the load and the second power supply end of the power supply device; the operational amplifier control circuit is also used to, when the power supply device is reversely connected to the power receiving working circuit, sequentially determine the flow direction of the current in the diode provided in the second diode drive circuit and the diode provided in the first diode drive circuit by processing the electrical signal provided by the second power supply end of the power supply device, so as to apply the electrical signal provided by the second power supply end of the power supply device to the positive input end of the load, and form an electrical path between the negative input end of the load and the first power supply end of the power supply device.

[0007] Furthermore, the first diode drive circuit includes a pair of diodes connected end to end, and a switching tube connected to the positive and negative ends of each diode; the operational amplifier control circuit includes a first operational amplifier and a second operational amplifier; the common end of the diodes connected end to end included in the first diode drive circuit is the first power receiving end, the control end of the switching tube included in the first diode drive circuit is connected to the negative output end of the first operational amplifier, and the negative input end of the first operational amplifier is connected to the first power receiving end through a resistor; the common end of the diodes connected end to end included in the second diode drive circuit is the second power receiving end, the control end of the switching tube included in the second diode drive circuit is connected to the negative output end of the second operational amplifier, and the negative input end of the second operational amplifier is connected to the second power receiving end through a resistor; the negative input end of the first operational amplifier and the negative input end of the second operational amplifier are connected through a resistor to form a path between the negative input end of the first operational amplifier and the negative input end of the second operational amplifier and generate a voltage difference.

[0008] Furthermore, the first operational amplifier is configured to, when the first power receiving end is connected to the first power supply end and the second power receiving end is connected to the second power supply end, process the electrical signal provided by the first power supply end into a first electrical signal and feed it back from the negative output end to the first diode drive circuit, so that the discharge current of the first power supply end of the power supply device does not flow through the diode provided in the first diode drive circuit, and then apply the voltage transmitted by the first power supply end of the power supply device to the positive input end of the load through the switching tube; and the second operational amplifier is configured to, when the first power receiving end is connected to the first power supply end and the second power receiving end is connected to the second power supply end, process the electrical signal applied to its negative input end into a second electrical signal having a voltage value lower than the first electrical signal and feed it back from the negative output end to the second diode drive circuit, so that the current does not flow through the diode provided in the second diode drive circuit, and then apply the electrical signal transmitted by the second power supply end of the power supply device to the negative input end of the load through the switching tube; wherein the first power supply end is the positive pole of the power supply device, and the second power supply end is the negative pole of the power supply device. When the first power receiving end is connected to the first power supply end and the second power receiving end is connected to the second power supply end, the power supply device is forward connected to the power receiving working circuit.

[0009] Furthermore, the first diode drive circuit includes two switch tubes with opposite polarities, and the second diode drive circuit includes two switch tubes with opposite polarities; the absolute value of the difference between the voltage value of the first electrical signal output from the negative output terminal of the first operational amplifier and the source voltage value of a corresponding switch tube in the first diode drive circuit is greater than a first preset conduction voltage threshold, so that the voltage value of the first power supply terminal of the power supply device is equal to the voltage value of the positive input terminal of the load; the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switch tube in the first diode drive circuit is less than a second preset conduction voltage threshold, so that the power supply device The electrical signal output from the first power supply terminal of the power supply device is not applied to the negative input terminal of the load; the absolute value of the difference between the voltage value of the second electrical signal output from the negative output terminal of the second operational amplifier and the source voltage value of one of the switch tubes in the second diode drive circuit is greater than the second preset conduction voltage threshold, so that the voltage value of the second power supply terminal of the power supply device is equal to the voltage value of the negative input terminal of the load; the absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of another switch tube in the second diode drive circuit is less than the first preset conduction voltage threshold, so that the electrical signal existing at the second power supply terminal of the power supply device is not applied to the positive input terminal of the load.

[0010] Furthermore, the second operational amplifier is used to process the electrical signal provided by the first power supply end into a first electrical signal and feed it back to the second diode drive circuit from the negative output end when the first power receiving end is connected to the second power supply end and the second power receiving end is connected to the first power supply end, so as to achieve that the discharge current of the first power supply end of the power supply device does not flow through the diode provided in the second diode drive circuit, and the electrical signal transmitted by the first power supply end of the power supply device is applied to the positive input end of the load; the first operational amplifier is used to process the electrical signal applied to its negative input end into a second electrical signal having a voltage value lower than the first electrical signal when the first power receiving end is connected to the second power supply end and the second power receiving end is connected to the first power supply end. And the negative output end is fed back to the first diode driving circuit to ensure that the current does not flow through the diode provided in the first diode driving circuit, and the electrical signal transmitted by the second power supply end of the power supply device is applied to the negative input end of the load, wherein the voltage value of the electrical signal at the second power supply end of the power supply device is lower than the voltage value of the second electrical signal; the voltage value of the electrical signal at the first power supply end is greater than the voltage value of the electrical signal at the second power supply end; wherein the first power supply end is the positive power supply electrode of the power supply device, the second power supply end is the negative power supply electrode of the power supply device, and when the first power receiving end is connected to the second power supply end and the second power receiving end is connected to the first power supply end, the power supply device is reversely connected to the power receiving working circuit.

[0011] Furthermore, the first diode drive circuit includes two switching tubes with opposite polarities, and the second diode drive circuit includes two switching tubes with opposite polarities; the absolute value of the difference between the voltage value of the first electrical signal output by the second operational amplifier and the source voltage value of a corresponding switching tube in the second diode drive circuit is greater than a first preset conduction voltage threshold, so that the voltage value of the first power supply terminal of the power supply device is equal to the voltage value of the positive input terminal of the load; the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switching tube in the second diode drive circuit is less than a second preset conduction voltage threshold, so that the electrical signal output by the first power supply terminal of the power supply device is not applied to the negative input terminal of the load; the absolute value of the difference between the voltage value of the first electrical signal output by the first operational amplifier and the source voltage value of one of the switching tubes in the first diode drive circuit is greater than the second preset conduction voltage threshold, so that the voltage value of the second power supply terminal of the power supply device is equal to the voltage value of the negative input terminal of the load; the absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of another switching tube in the first diode drive circuit is less than the first preset conduction voltage threshold, so that the electrical signal present at the second power supply terminal of the power supply device is not applied to the positive input terminal of the load.

[0012] Furthermore, the operational amplifier control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor; the first operational amplifier and the second operational amplifier are both differential operational amplifiers; the first power receiving end is connected to the second power receiving end through the first resistor to form a power supply loop between the first power supply end, the first power receiving end, the second power supply end, and the second power receiving end; one end of the second resistor is connected to the first power receiving end, the other end of the second resistor is connected to the negative input end of the first operational amplifier, and the positive output end of the first operational amplifier is connected to the negative input end of the first operational amplifier through the fifth resistor. end, one end of the sixth resistor is grounded, the other end of the sixth resistor is connected to the positive input terminal of the first operational amplifier, and the negative output terminal of the first operational amplifier is connected to the positive input terminal of the first operational amplifier through a ninth resistor; one end of the third resistor is connected to the second power receiving terminal, the other end of the third resistor is connected to the negative input terminal of the second operational amplifier, the positive output terminal of the second operational amplifier is connected to the negative input terminal of the second operational amplifier through a fourth resistor, one end of the seventh resistor is grounded, the other end of the seventh resistor is connected to the positive input terminal of the second operational amplifier, and the negative output terminal of the second operational amplifier is connected to the positive input terminal of the second operational amplifier through an eighth resistor.

[0013] Furthermore, the positive power supply terminal of the first operational amplifier and the positive power supply terminal of the second operational amplifier are both connected to the positive input terminal of the load; the negative power supply terminal of the first operational amplifier and the negative power supply terminal of the second operational amplifier are both grounded; the common mode input terminal of the first operational amplifier and the common mode input terminal of the second operational amplifier are both connected to the reference voltage signal; wherein, the voltage value of the signal output by the negative output terminal of the first operational amplifier is less than the voltage value of the reference voltage signal input by the first operational amplifier, the resistance value of the fifth resistor is equal to the resistance value of the ninth resistor, and the resistance value of the second resistor is equal to the resistance value of the sixth resistor; wherein, the voltage value of the signal output by the negative output terminal of the second operational amplifier is less than the voltage value of the reference voltage signal input by the second operational amplifier, the resistance value of the fourth resistor is equal to the resistance value of the eighth resistor, the resistance value of the seventh resistor is equal to the resistance value of the third resistor, the resistance value of the eighth resistor is equal to the resistance value of the ninth resistor, and the resistance value of the sixth resistor is equal to the resistance value of the seventh resistor.

[0014] Furthermore, the two switching tubes with opposite polarities included in the first diode driving circuit are respectively a first NMOS tube and a first PMOS tube, and the two switching tubes with opposite polarities included in the second diode driving circuit are respectively a second NMOS tube and a second PMOS tube; the first diode driving circuit also includes a first diode and a second diode, the forward end of the first diode is connected to the source of the first NMOS tube, the reverse end of the first diode is connected to the drain of the first NMOS tube, the reverse end of the first diode is connected to the forward end of the second diode, the forward end of the second diode is connected to the drain of the first PMOS tube, the reverse end of the second diode is connected to the source of the first PMOS tube, and the gate of the first NMOS tube is connected to the gate of the first PMOS tube, wherein the gate of the first PMOS tube and the gate of the first NMOS tube are both control ends of the switching tubes inside the first diode driving circuit, and the reverse end of the first diode and the forward end of the second diode are both connected to the A first power receiving terminal; a forward end of the first diode is connected to the negative input terminal of the load, and a negative end of the second diode is connected to the positive input terminal of the load; the second diode driving circuit further includes a third diode and a fourth diode, wherein the forward end of the third diode is connected to the source of the second NMOS transistor, the reverse end of the third diode is connected to the drain of the second NMOS transistor, the reverse end of the third diode is connected to the forward end of the fourth diode, the forward end of the fourth diode is connected to the drain of the second PMOS transistor, the reverse end of the fourth diode is connected to the source of the second PMOS transistor, and the gate of the second NMOS transistor is connected to the gate of the second PMOS transistor, wherein the gate of the second PMOS transistor and the gate of the first NMOS transistor are both control terminals of the switching transistor within the second diode driving circuit, and the reverse end of the third diode and the forward end of the fourth diode are both connected to the second power receiving terminal; the forward end of the third diode is connected to the negative input terminal of the load, and the negative end of the fourth diode is connected to the positive input terminal of the load.

[0015] An electronic atomization terminal includes a power supply device, a load and the powered working circuit, wherein the power supply device is plugged into the powered working circuit through an interface, or the powered working circuit is plugged into the power supply device through an interface.

[0016] Furthermore, the electronic atomization terminal includes a cigarette rod and a cigarette cartridge, the cigarette rod is provided with a male interface, and the cigarette cartridge is provided with a pluggable female interface; the power supply device is arranged in the cigarette rod, and the power receiving working circuit and the load are arranged in the cigarette cartridge, so that when the cigarette rod is plugged into the cigarette cartridge, the power supply device is connected to the power receiving working circuit; wherein, the load is used to receive the power provided by the power supply device when the power supply device is forwardly connected to the power receiving working circuit or reversely connected to the power receiving working circuit, so as to continue to atomize the aerosol source.

[0017] The technical effects of this application are:

[0018] The technical solution of the present application uses two pairs of diodes and two pairs of switching tubes to simultaneously provide voltages at the first power supply end and the second power supply end to the operational amplifier. The operational amplifier is then used to feedback-adjust the voltages provided by the first power supply end and the second power supply end so that only one switching tube in each pair of switching tubes is turned on. Therefore, regardless of whether the power supply device is connected forward or reverse, based on the unidirectional conductivity of the diode and the short-circuit effect of the switching tube on the diode, the positive input end of the load can be connected to the positive pole of the power supply device, and the negative input end of the load can be connected to the negative pole of the power supply device; therefore, there is no need to distinguish between the positive and negative poles, and the voltage at both ends of the receiving end can be equal to the voltage at both ends of the power supply end.

[0019] Compared with the existing technology, when the power supply device is electrically connected to the power receiving working circuit through the interface, there is no need to use the built-in program to first identify the positive and reverse connection status of the corresponding power supply port. As long as the cigarette rod and cigarette cartridge are matched and the power supply circuit and power supply port in the cigarette cartridge are fixed, whether it is positive or reverse connection, it can be plugged and powered, which speeds up the atomization speed of the aerosol source, makes it quick and convenient to inhale the electronic cigarette, and improves the smoker's experience; it overcomes the inconvenience of blind plug detection of the chip in the existing technology, and the operational amplifier built into the power receiving working circuit is low-priced, has a large product volume and a wide range of products, and its performance indicators are suitable for outputting general high and low levels for driving the switch tube to turn on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a power receiving circuit supporting forward and reverse connection is disclosed in an embodiment. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are further described below with reference to the accompanying drawings. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] As an embodiment, to ensure rapid and normal discharge of a load regardless of whether the interface is connected forward or reverse, a power receiving circuit that supports both forward and reverse connections is disclosed. The power receiving end of the power receiving circuit is used to supply power to the power supply end of a power supply device. The power receiving circuit can be plugged into the power supply device (including a built-in voltage source) via the interface, or the power supply device (including a built-in voltage source) can be plugged into the power receiving circuit via the interface. Thus, the power receiving end of the power receiving circuit is electrically connected to the power supply end of the power supply device, forming a power supply loop. The power supply device is internally provided with a circuit control board for powering and communicating with the power receiving circuit. The power supply end is coupled to the power supply circuit within the circuit control board. The power receiving circuit is electrically connected to the load. The power supply device and the power receiving circuit can be located in two different chambers, each with a pluggable interface. If the power receiving circuit is located on a printed circuit board, the power receiving end can be located at the edge of the printed circuit board and electrically insulated from the chamber outside the circuit. When used in an electronic cigarette, the power supply device is located within the cigarette holder, and the power receiving circuit and the load for atomization are located within the chamber of the cigarette cartridge. The load can be a heating resistor with positive and negative input terminals, an indicator light, or an oscillating element. The power receiving end of the power receiving working circuit and the power supply end of the power supply device are physically contacted by means of interface plugging to establish an electrical connection.

[0023] In this embodiment, the power receiving end of the power receiving working circuit is located on a pluggable interface or is electrically connected to the interface; the power supply end of the power supply device is located on an interface that matches the aforementioned pluggable interface or is electrically connected to the matching interface. Specifically, the power supply device is provided with a first interface, and the power supply end is provided in the first interface or is connected to a port with the same electrical properties in the first interface; the power consuming device where the power receiving working circuit is located is provided with a second interface, and the power receiving end of the power receiving working circuit is provided in the second interface or is connected to a port with the same electrical properties in the second interface. For example, in the aforementioned cigarette cartridge, the first interface and the second interface can become the docking interface between the cigarette rod and the cigarette cartridge, that is, the corresponding male interface and female interface. Simply put, a solid interface (which may have a needle) is called a male interface, and a hollow interface (with a hole recessed inward) is called a female interface. Preferably, when the first interface is the male interface of a USB interface, the second interface is the female interface of the USB interface; or, when the first interface is the female interface of a USB interface, the second interface is the male interface of the USB interface. The power supply device charges or discharges the powered working circuit by connecting the interface in a forward or reverse manner. In this embodiment, the power supply device does not distinguish and identify the forward or reverse connection of the interface before supplying power to the load normally, and the system is plug-and-play.

[0024] like Figure 1As shown, the power receiving working circuit includes a first diode driving circuit 101 , a second diode driving circuit 103 , and an operational amplifier control circuit 102 ; the first diode driving circuit 101 and the second diode driving circuit 103 are both connected to the operational amplifier control circuit 102 . In which, both the first diode drive circuit 101 and the second diode drive circuit 103 include a diode and a switching tube. The diode has positive and negative terminals. The switching tube can be a transistor with three ports, a MOS tube, etc. The operational amplifier control circuit 102 includes at least two operational amplifier structures, which are respectively used to control the first diode drive circuit 101 and the second diode drive circuit 103 to ensure that when the power supply device is connected to the power receiving working circuit in the positive and negative directions, an electrical path is formed between the positive input terminal V+ of the load U1 and the positive power terminal of the power supply device, and an electrical path is formed between the negative input terminal V- of the load U1 and the negative power terminal of the power supply device. Therefore, the power supply device normally supplies the load U1 with a voltage that is the same as the voltage between the first power supply terminal UD1 and the second power supply terminal UD2 of the power supply device through the power receiving working circuit. In which, the voltage between the first power supply terminal UD1 and the second power supply terminal UD2 of the power supply device is pre-set to a voltage that can drive the load to operate normally. This embodiment designs an operational amplifier structure to process signals to control the first diode drive circuit 101 and the second diode drive circuit 103. There is no need to add an additional MCU to monitor the forward and reverse plugging of the interface and to distribute power to different interface states. The power supply voltage set in the power supply device can be transmitted losslessly, so the normal power supply to the load can be completed to drive the load to work by plugging it in. This simplifies the circuit structure and avoids the need to repeatedly query and confirm the plugging status of the interface and perform the power distribution process through the operation of the built-in program of the chip.

[0025] In the above embodiment, the power receiving end of the power receiving working circuit includes a first power receiving end VD1 and a second power receiving end VD2, and the power supply end of the power supply device includes a first power supply end UD1 and a second power supply end UD2. Specifically, when the first power supply end UD1 is the positive power supply end of the power supply device, the second power supply end UD2 is the negative power supply end of the power supply device. When the first power supply end UD1 is the negative power supply end, the second power supply end UD2 is the positive power supply end, and vice versa. When the first power supply end UD1 is connected to the first power receiving end VD1 and the second power supply end UD2 is connected to the second power receiving end VD2, the power supply device is connected in the forward direction to the power receiving working circuit. When the first power supply end UD1 is connected to the second power receiving end VD2 and the second power supply end UD2 is connected to the first power receiving end VD1, the power supply device is connected in the reverse direction to the power receiving working circuit.

[0026] In some embodiments, the operational amplifier control circuit is used to determine the flow direction of the current in the diode provided in the first diode driving circuit 101 and the diode provided in the second diode driving circuit 103 by processing the electrical signal provided (generated by discharge) by the first power supply terminal UD1 of the power supply device when the power supply device is forward connected to the power receiving working circuit. Specifically, after the first power receiving terminal VD1 receives the electrical signal provided by the first power supply terminal UD1, the operational amplifier control circuit performs a comparison operation on the electrical signal provided by the first power supply terminal UD1. For example, the operational amplifier control circuit can compare the electrical signal provided by the first power supply terminal UD1 with a reference voltage signal and adjust the first diode driving circuit 103 to the desired direction. The electrical signal transmitted by the driving circuit is processed into a level signal lower than the reference voltage, and the level signal lower than the reference voltage is used to determine the flow direction of the current in the diode provided in the first diode driving circuit, connecting the first power supply end of the power supply device and the positive input end of the load; then, the operational amplifier control circuit can also compare the electrical signal provided by the second power supply end UD2 with the reference voltage signal, and process the electrical signal transmitted by the second diode driving circuit into a level signal lower than the reference voltage, and use the level signal lower than the reference voltage to determine the flow direction of the current in the diode provided in the second diode driving circuit, connecting the second power supply end of the power supply device and the negative input end of the load. In summary, the operational amplifier control circuit sequentially controls the direction of current flowing through the diode within the first diode driver circuit and the direction of current flowing through the diode within the second diode driver circuit. These currents can flow back to the power supply device through the power receiving circuit, forming a power supply loop that guides the electrical signals provided by the first power supply terminal UD1 and the second power supply terminal UD2 to be applied to the load through this power supply loop, thereby applying the electrical signal provided by the first power supply terminal of the power supply device to the positive input terminal of the load and forming an electrical path between the negative input terminal of the load and the second power supply terminal of the power supply device. This allows the power supply device to output power to the load through the power receiving circuit, where the electrical signal can be a voltage signal; the first power supply terminal UD1 is the positive power supply terminal within the power supply device, and the second power supply terminal UD2 is the negative power supply terminal within the power supply device.

[0027] In some embodiments, the operational amplifier control circuit is further used to determine the direction of current flow in the diode provided in the second diode drive circuit and the diode provided in the first diode drive circuit by processing the electrical signal (including the level signal generated by discharge) provided by the second power supply terminal UD2 of the power supply device when the power supply device is reversely connected to the power receiving working circuit. Specifically, after the second power receiving terminal VD2 receives the electrical signal provided by the first power supply terminal UD1, the operational amplifier control circuit performs a comparison operation on the electrical signal provided by the first power supply terminal UD1. For example, the operational amplifier control circuit can compare the electrical signal provided by the first power supply terminal UD1 with the reference voltage signal, and process the electrical signal transmitted by the second diode drive circuit. It is a level signal lower than the reference voltage, and the level signal lower than the reference voltage is used to determine the flow direction of the current in the diode provided in the second diode driving circuit, connecting the first power supply end of the power supply device and the positive input end of the load; then, the operational amplifier control circuit can also compare the electrical signal provided by the second power supply end UD2 with the reference voltage signal, and process the electrical signal transmitted by the first diode driving circuit into a level signal lower than the reference voltage, and use the level signal lower than the reference voltage to determine the flow direction of the current in the diode provided in the first diode driving circuit, connecting the second power supply end of the power supply device and the positive input end of the load, and connecting the second power supply end of the power supply device and the negative input end of the load. In summary, the operational amplifier control circuit successively obtains control over the direction of the current flowing through the diode provided in the second diode drive circuit, and the direction of the current flowing through the diode provided in the first diode drive circuit. These currents can flow back to the power supply device through the power receiving working circuit, forming a power supply loop, guiding the electrical signal provided by the first power supply terminal UD1 and the second power supply terminal UD2 to be applied to the load through the power supply loop, so as to achieve the application of the electrical signal provided by the second power supply terminal of the power supply device to the positive input terminal of the load, and form an electrical path between the negative input terminal of the load and the first power supply terminal of the power supply device. The electrical signal can be a voltage signal; the first power supply terminal UD1 is the positive power supply terminal provided in the power supply device, and the second power supply terminal UD2 is the negative power supply terminal provided in the power supply device.

[0028] As an example, Figure 1As shown, the first diode driving circuit 101 includes a pair of diodes connected end to end, and a switch tube connected to the positive and negative ends of each diode; the operational amplifier control circuit 102 includes a first operational amplifier Amp1 and a second operational amplifier Amp2. The common terminal of the end-to-end connected diodes included in the first diode drive circuit 101 is the first power receiving terminal VD1. The control terminal of the switching tube included in the first diode drive circuit 101 is connected to the negative output terminal - of the first operational amplifier Amp1. The negative input terminal - of the first operational amplifier Amp1 is connected to the first power receiving terminal VD1 via a resistor R2. When necessary, the negative input terminal - of the first operational amplifier Amp1 is further connected to the positive output terminal + of the first operational amplifier Amp1 via a feedback resistor R5 to form a feedback loop. The negative output terminal - of the first operational amplifier Amp1 is further connected to the negative output terminal - of the first operational amplifier Amp1 via a feedback resistor R9 to form another feedback loop. This performs feedback processing on the electrical signal provided by the first power supply terminal VD1 of the power supply device to obtain an electrical signal for turning on or off the switching tube included in the first diode drive circuit 101, thereby improving the driving capability of the electrical signal provided by the first power supply terminal VD1 of the power supply device and accelerating the voltage output speed of the first diode drive circuit 101 to the load U1.

[0029] like Figure 1 As shown, the common terminal of the end-to-end connected diodes included in the second diode driving circuit 103 is the second power receiving terminal VD2. The control terminal of the switching tube included in the second diode driving circuit 103 is connected to the negative output terminal - of the second operational amplifier Amp2. The negative input terminal - of the second operational amplifier Amp2 is connected to the second power receiving terminal VD2 via a resistor R4. If necessary, the negative input terminal - of the second operational amplifier Amp2 is further connected to the positive output terminal + of the second operational amplifier Amp2 via a feedback resistor R4 to form a feedback loop. The negative output terminal - of the second operational amplifier Amp2 is further connected to the negative output terminal - of the second operational amplifier Amp2 via a feedback resistor R8 to form another feedback loop. This performs feedback processing on the electrical signal provided by the second power supply terminal VD2 of the power supply device to obtain an electrical signal for turning on or off the switching tube included in the second diode driving circuit 103, thereby improving the driving capability of the electrical signal provided by the second power supply terminal VD2 of the power supply device and accelerating the voltage loading speed of the second diode driving circuit 103 on the load U1.

[0030] The negative input terminal of the first operational amplifier Amp1 and the negative input terminal of the second operational amplifier Amp2 are connected via a resistor. Specifically, the second power supply terminal VD2 and the first power supply terminal VD1 are connected via the resistor R1. As a result, after the power supply device and the power receiving working circuit are connected in positive and negative directions, the current generated by the discharge of the power supply device can flow from one power supply terminal of the power supply device through the resistor R1 back to the other power supply terminal of the power supply device. This forms a path between the negative input terminal of the first operational amplifier Amp1 and the negative input terminal of the second operational amplifier Amp2, generating a voltage difference and forming one section of a complete power supply loop.

[0031] Regarding the forward and reverse connection in the aforementioned embodiments, it should be noted that when the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, the power supply device is connected in the forward direction to the power receiving circuit. The first power supply terminal UD1 is connected to the positive terminal of the power supply (the positive terminal of the power supply provided within the power supply device), and the second power supply terminal UD2 is connected to the negative terminal of the power supply (the negative terminal of the power supply provided within the power supply device). Conversely, in some embodiments, when the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, the power supply device is connected in the reverse direction to the power receiving circuit. The first power supply terminal UD1 is connected to the negative terminal of the power supply (the negative terminal of the power supply provided within the power supply device), and the second power supply terminal UD2 is connected to the positive terminal of the power supply (the positive terminal of the power supply provided within the power supply device). In other words, a path is formed between the first power receiving terminal VD1 and the positive terminal of the power supply provided within the power supply device, and a path is formed between the second power receiving terminal VD2 and the negative terminal of the power supply provided within the power supply device.

[0032] Regarding the forward and reverse connection in the aforementioned embodiments, it should be noted that when the first power receiving terminal VD1 is connected to the second power supply terminal UD2 and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, the power supply device is reversely connected to the powered working circuit, wherein the first power supply terminal UD1 is connected to the positive terminal of the power supply (the positive terminal of the power supply provided within the power supply device), and the second power supply terminal UD2 is connected to the negative terminal of the power supply (the negative terminal of the power supply provided within the power supply device). Conversely, in some embodiments, when the first power receiving terminal VD1 is connected to the second power supply terminal UD2 and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, the power supply device is forwardly connected to the powered working circuit, wherein the first power supply terminal UD1 is connected to the negative terminal of the power supply (the negative terminal of the power supply provided within the power supply device), and the second power supply terminal UD2 is connected to the positive terminal of the power supply (the positive terminal of the power supply provided within the power supply device). In other words, a path is formed between the first power receiving terminal VD1 and the negative terminal of the power supply provided within the power supply device, and a path is formed between the second power receiving terminal VD2 and the positive terminal of the power supply provided within the power supply device.

[0033] As a first embodiment of the positive connection, the voltage value of the electrical signal at the first power supply terminal UD1 is the voltage value of the positive pole of the power supply of the power supply device, and the voltage value of the electrical signal at the second power supply terminal UD2 is the voltage value of the negative pole of the power supply of the power supply device, wherein the voltage between the first power supply terminal UD1 and the second power supply terminal UD2 of the power supply device is pre-set to the rated working voltage of the load, so as to achieve the normal power-on operation of the load when the power supply voltage of the power supply device is applied to the positive and negative ends of the load without loss. When the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, the power supply device is forwardly connected to the power receiving working circuit. The first operational amplifier Amp1 is used to process the electrical signal provided by the first power supply terminal UD1 (considered as the electrical signal provided by the first power receiving terminal VD1) into a first electrical signal and feed it back to the first diode driving circuit 101 from the negative output terminal - when the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, corresponding to Figure 1, the negative output terminal of the first operational amplifier Amp1 outputs a signal to the control terminal of the switch tube included in the first diode driving circuit 101; in this embodiment, the negative output terminal of the first operational amplifier Amp1 outputs a signal that is a result of processing the electrical signal transmitted by the first operational amplifier Amp1 and the feedback resistor to the first power supply terminal UD1 (regarded as the first power receiving terminal VD1); specifically, the first diode driving circuit 101 includes two switch tubes with opposite polarities, and the second diode driving circuit 103 includes two switch tubes with opposite polarities, then: the voltage value of the first electrical signal output by the negative output terminal of the first operational amplifier Amp1 is equal to the source voltage of the corresponding switch tube MP1 in the first diode driving circuit. When the absolute value of the difference between the voltage values ​​at the two terminals is greater than a first preset turn-on voltage threshold, the switch tube MP1 is turned on. When the switch tube MP1 is turned on, the diode D2 provided in the first diode drive circuit is short-circuited. As a result, the discharge current at the first power supply terminal UD1 (considered as the first power receiving terminal VD1) of the power supply device does not flow through the diode D2 provided in the first diode drive circuit. Then, the voltage transmitted from the first power supply terminal UD1 (considered as the first power receiving terminal VD1) of the power supply device is applied to the positive input terminal V+ of the load through the switch tube MP1. That is, the voltage transmitted from the first power receiving terminal VD1 is applied to the positive input terminal V+ of the load, so that the voltage value at the first power supply terminal UD1 of the power supply device (considered as the voltage value of the first power receiving terminal VD1) is equal to the voltage value at the positive input terminal V+ of the load U1. At the same time, the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switch tube MN1 in the first diode drive circuit is less than a second preset conduction voltage threshold, and the switch tube MN1 is turned off. As a result, the electrical signal output by the first power supply terminal UD1 of the power supply device (considered as the first power receiving terminal VD1) is not applied to the negative input terminal V- of the load U1 through the switch tube MN1, thereby preventing the load from being burned due to reverse connection of electrodes. Furthermore, due to the unidirectional conductivity of the diode D1, the discharge current of the first power supply terminal UD1 of the power supply device (considered as the first power receiving terminal VD1) does not flow through the diode D1 provided in the first diode drive circuit. Therefore, the electrical signal transmitted by the first power supply terminal UD1 of the power supply device is not transmitted to the negative input terminal V- of the load through the diode D1. As a result, the first power receiving terminal VD1 is not electrically connected to the negative input terminal V- of the load, thereby preventing the load from being burned due to reverse connection of electrodes. The switch transistor MN1 and the switch transistor MP1 are of different types, and therefore have different threshold voltages required for them to be turned on (on). The threshold voltage required for the P-type MOS transistor to be turned on (on) is equal to a first preset turn-on voltage threshold, and the threshold voltage required for the N-type MOS transistor to be turned on (on) is equal to a second preset turn-on voltage threshold.On this basis, the second operational amplifier Amp2 is used to process the electric signal applied to the negative input terminal of the second operational amplifier Amp2 into a second electric signal with a voltage lower than the first electric signal when the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, and feed the electric signal fed back to the second diode driving circuit 103 through the negative output terminal. The electric signal applied to the negative input terminal of the second operational amplifier Amp2 can be regarded as the electric signal transmitted by the first power supply terminal UD1 (regarded as the first power receiving terminal VD1) in the resistor As a result of the voltage division between R1 and the resistor R3, the voltage value of the negative input terminal - of the second operational amplifier Amp2 is less than the voltage value at the first power supply terminal UD1 (considered as the first power receiving terminal VD1). The second electrical signal outputted by the negative output terminal - of the second operational amplifier Amp2 is the result of the second operational amplifier Amp2 processing the electrical signal of its negative input terminal. The voltage value of the second electrical signal is less than the voltage value of the first electrical signal. Before discharging the load U1, the voltage value at the negative input terminal V- of the load U1 is lower than the voltage value of the second electrical signal. If the absolute value of the difference between the voltage of the second electrical signal output from the negative output terminal of the second operational amplifier Amp2 and the source voltage of one of the switches MN2 in the second diode drive circuit is greater than a second preset turn-on voltage threshold, then the switch MN2 is turned on and short-circuit diode D3 in the second diode drive circuit. Current does not flow through diodes D3 and D4 in the second diode drive circuit. Instead, current connects the second power receiving terminal VD2 (or the second power supply terminal UD2 of the power supply device) to the negative input terminal V- of the load U1 through the switch MN2, so that the voltage at the second power supply terminal UD2 of the power supply device is equal to the voltage at the negative input terminal V- of the load U1. If the absolute value of the difference between the voltage of the second electrical signal and the source voltage of another switch MP2 in the second diode drive circuit is less than the first preset turn-on voltage threshold, the switch MP2 is turned off. As a result, the electrical signal at the second power supply terminal UD2 of the power supply device is not applied to the positive input terminal V+ of the load U1 through the switch MP2. The switches MN2 and MP2 are of different types, and therefore require different threshold voltages for their conduction (opening). Preferably, when the voltage value at the positive input terminal V+ of the load U1 to which the positive terminal of the diode D4 is connected (considered to be equal to the voltage value at the first power supply terminal UD1) is higher than the voltage value at the second power supply terminal UD2 (equivalent to the voltage value at the second power receiving terminal VD2), the unidirectional conductivity of the diode D4 prevents current from flowing through the diode D4. Therefore, the discharge current at the second power receiving terminal VD2 (or the second power supply terminal UD2 of the power supply device) does not flow through the diode D4 provided in the second diode drive circuit and reach the positive input terminal V+ of the load U1.

[0034] In the second embodiment of a forward connection, the voltage value of the electrical signal at the first power supply terminal UD1 is the negative voltage of the power supply, while the voltage value of the electrical signal at the second power supply terminal UD2 is the positive voltage of the power supply. When the first power receiving terminal VD1 is connected to the second power supply terminal UD2, and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, the power supply device is forward connected to the powered operating circuit. The specific implementation is similar to the first embodiment of the forward connection, except that the connection method and signal flow of the second power supply terminal UD2 and the first power supply terminal UD1 are reversed, and will not be repeated here.

[0035] As a first embodiment of reverse connection, the voltage value of the electrical signal at the first power supply terminal UD1 is the voltage value of the positive electrode of the power supply device, and the voltage value of the electrical signal at the second power supply terminal UD2 is the voltage value of the negative electrode of the power supply device. The voltage between the second power supply terminal UD2 and the first power supply terminal UD1 of the power supply device is preset to the rated operating voltage of the load, so that the power supply voltage of the power supply device is applied to the positive and negative terminals of the load without loss, driving the load to power on and operate normally. When the first power receiving terminal VD1 is connected to the second power supply terminal UD2, and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, the power supply device is reversely connected to the powered operating circuit, wherein the first power receiving terminal VD1 is connected to the negative electrode voltage of the power supply device, and the second power receiving terminal VD2 is connected to the positive electrode voltage of the power supply device. The second operational amplifier Amp2 is used to process the electrical signal provided by the first power supply terminal UD1 (regarded as the electrical signal provided by the second power receiving terminal VD2) into a first electrical signal and feed it back to the second diode driving circuit 103 through the negative output terminal when the first power receiving terminal VD1 is connected to the second power supply terminal UD2 and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, corresponding to Figure 1The negative output terminal of the second operational amplifier Amp2 outputs a signal to the control terminal of the switch tube included in the second diode driving circuit 103; in this embodiment, the negative output terminal of the second operational amplifier Amp2 outputs a signal that is a result of processing the electrical signal transmitted by the second operational amplifier Amp2 and the feedback resistor to the second power receiving terminal VD2. Specifically, the second diode drive circuit 103 includes two switching tubes with opposite polarities. If the absolute value of the difference between the voltage value of the first electrical signal outputted by the negative output terminal of the second operational amplifier Amp2 and the source voltage value of a corresponding switching tube MP2 in the second diode drive circuit is greater than a first preset turn-on voltage threshold, the switching tube MP2 is turned on. When the switching tube MP2 is turned on, the diode D4 provided in the second diode drive circuit is short-circuited, and the discharge current of the second power receiving terminal VD2 does not flow through the diode D4 provided in the second diode drive circuit. Then, the voltage transmitted from the first power supply terminal UD1 (considered as the second power receiving terminal VD2) of the power supply device is applied to the positive input terminal V+ of the load through the switching tube MP2, so that the voltage value of the first power supply terminal UD1 of the power supply device (considered as the voltage value of the second power receiving terminal VD2) is equal to the voltage value of the positive input terminal V+ of the load U1. At the same time, the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switch tube MN2 in the second diode drive circuit is less than the second preset conduction voltage threshold, and the switch tube MN2 is turned off. Then, the electrical signal output from the first power supply terminal UD1 (considered as the second power receiving terminal VD2) of the power supply device is not applied to the negative input terminal V- of the load U1 through the switch tube MN2, thereby avoiding the reverse connection of the electrodes and burning the load; and, due to the unidirectional conductivity of the diode D3, the discharge current of the second power receiving terminal VD2 does not flow through the diode set in the second diode drive circuit. If the diode D3 is connected, the electrical signal transmitted by the first power supply terminal UD1 of the power supply device will not be transmitted to the negative input terminal V- of the load through the diode D3, and the second power receiving terminal VD2 will not be electrically connected to the negative input terminal V- of the load, thereby preventing the load from being burned due to reverse connection of electrodes. Among them, the switch tube MN2 and the switch tube MP2 are of different types, and the threshold voltage values ​​required for them to be turned on (turned on) are different. The threshold voltage required for the P-type MOS tube to be turned on (turned on) is equal to the first preset turn-on voltage threshold, and the threshold voltage required for the N-type MOS tube to be turned on (turned on) is equal to the second preset turn-on voltage threshold.On this basis, the first operational amplifier Amp1 is configured to process the electrical signal applied to the negative input terminal - of the first operational amplifier Amp1 into a second electrical signal having a voltage lower than the first electrical signal when the first power receiving terminal VD1 is connected to the second power supply terminal UD2 and the second power receiving terminal VD2 is connected to the first power supply terminal UD1, and to feed the second electrical signal back to the first diode driving circuit 101 through the negative output terminal -. The electrical signal applied to the negative input terminal - of the first operational amplifier Amp1 can be regarded as a voltage division result of the electrical signal transmitted from the second power receiving terminal VD2 in the resistors R1 and R2. The voltage value of the negative input terminal - of the first operational amplifier Amp1 is lower than the voltage value at the second power receiving terminal VD2. The second electrical signal outputted from the negative output terminal - of the first operational amplifier Amp1 is the result of the first operational amplifier Amp1 processing the electrical signal applied to its negative input terminal. The voltage value of the second electrical signal is lower than the voltage value of the first electrical signal. Before discharging the load U1, the voltage value at the negative input terminal V- of the load U1 is lower than If the absolute value of the difference between the voltage value of the second electrical signal output from the negative output terminal of the first operational amplifier Amp1 and the source voltage value of one of the switch tubes MN1 in the first diode drive circuit is greater than a second preset turn-on voltage threshold, then the switch tube MN1 is turned on and short-circuit the diode D1 in the first diode drive circuit. Current does not flow through the diodes D1 and D2 in the second diode drive circuit. Instead, current connects the first power receiving terminal VD1 with the negative input terminal V- of the load U1 through the switch tube MN1, so that the voltage value of the first power supply terminal UD1 of the power supply device is equal to the voltage value of the negative input terminal V- of the load U1. If the absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of another switch tube MP1 in the first diode drive circuit is less than the first preset turn-on voltage threshold, the switch tube MP1 is turned off. Then, the electrical signal present at the first power receiving terminal VD1 is not applied to the positive input terminal V+ of the load U1 through the switch tube MP1, thereby avoiding reverse connection of electrodes and burning of the load. Preferably, when the voltage value at the positive input terminal V+ of the load U1 connected to the positive end of the diode D2 is higher than the voltage value at the first power supply terminal UD1 (equivalent to the voltage value at the first power receiving terminal VD1), the unidirectional conductivity of the diode D2 prevents current from flowing through the diode D2. Therefore, the discharge current at the first power receiving terminal VD1 (or the first power supply terminal UD1 of the power supply device) does not flow through the diode D2 provided in the first diode drive circuit to the positive input terminal V+ of the load U1, thereby preventing the load from being burned due to reversed electrode connection.

[0036] In a second embodiment of reverse connection, the voltage value of the electrical signal at the first power supply terminal UD1 is the voltage value of the negative terminal of the power supply device, and the voltage value of the electrical signal at the second power supply terminal UD2 is the voltage value of the positive terminal of the power supply device. When the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, the power supply device is reversely connected to the powered operating circuit. The specific implementation method is similar to the first embodiment of reverse connection described above, except that the connection method and signal flow of the first power supply terminal UD1 and the second power supply terminal UD2 are reversed, and will not be repeated here.

[0037] In summary, the power receiving circuit uses two pairs of diodes (diode D1 and diode D2 in the figure form one pair, and diode D3 and diode D4 form another pair) and two pairs of switching tubes (switch tubes MN1 and MP1 in the figure form one pair, and switch tubes MN2 and MP2 form another pair), and simultaneously provides the voltage of the first power supply end and the second power supply end to the operational amplifier. The operational amplifier then uses the voltage feedback provided by the first power supply end and the second power supply end to adjust so that only one switch tube in each pair is turned on and the other switch tube is cut off. Therefore, regardless of whether the power supply device is connected forward or reverse, Due to the unidirectional conductivity of the diode and the short-circuit effect of the switch on the diode, the positive input terminal of the load can be connected to the positive terminal of the power supply device, and the negative input terminal of the load can be connected to the negative terminal of the power supply device. Therefore, there is no need to distinguish between the positive and negative poles, and the voltage across the receiving end can be equal to the voltage across the power supply end, eliminating the voltage difference between the two ports caused by the diode. After the power supply device and the powered working circuit are plugged in, they can immediately realize normal power supply and operation of the load, without the need for calibration to achieve high accuracy (such as excessive consideration of offset voltage and zero drift).

[0038] In the above embodiments, see Figure 1It can be seen that the operational amplifier control circuit 102 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The first operational amplifier Amp1 and the second operational amplifier Amp2 are both differential operational amplifiers. The first power receiving terminal VD1 is connected to the second power receiving terminal VD2 via the first resistor R1. Regardless of whether the first power supply terminal UD1 is connected to the first power receiving terminal VD1 and the second power supply terminal UD2 is connected to the second power receiving terminal VD2, or whether the first power supply terminal UD1 is connected to the second power receiving terminal VD2 and the second power supply terminal UD2 is connected to the first power receiving terminal VD1, a power supply loop is formed between the first power supply terminal UD1, the first power receiving terminal VD1, the second power supply terminal UD2, and the second power receiving terminal VD2. One end of the second resistor R2 is connected to the first power receiving terminal VD1, and the other end of the second resistor R2 is connected to the negative input terminal - of the first operational amplifier Amp1. The positive output terminal + of the first operational amplifier Amp1 is connected to the negative input terminal - of the first operational amplifier Amp1 via a fifth resistor R5 to form a negative feedback structure. One end of the sixth resistor R6 is grounded, and the other end of the sixth resistor R6 is connected to the positive input terminal + of the first operational amplifier Amp1. The negative output terminal - of the first operational amplifier Amp1 is connected to the positive input terminal + of the first operational amplifier Amp1 via a ninth resistor R9 to form a positive feedback structure, thereby forming a differential operational amplifier structure with positive and negative feedback loops. The positive input terminal of the operational amplifier is connected to the voltage signal provided by the first power receiving terminal VD1, and the negative input terminal is not connected to an input signal. One end of a third resistor R3 is connected to the second power receiving terminal VD2, and the other end of the third resistor R3 is connected to the negative input terminal - of the second operational amplifier Amp2. The positive output terminal + of the second operational amplifier Amp2 is connected to the negative input terminal - of the second operational amplifier Amp2 via a fourth resistor R4, forming a negative feedback structure. One end of a seventh resistor R7 is grounded, and the other end of the seventh resistor R7 is connected to the positive input terminal + of the second operational amplifier Amp2. The negative output terminal - of the second operational amplifier Amp2 is connected to the positive input terminal + of the second operational amplifier Amp2 via an eighth resistor R8, forming a positive feedback structure. This constitutes a differential operational amplifier structure with positive and negative feedback loops. The negative input terminal of the operational amplifier is connected to the voltage signal provided by the first power receiving terminal VD1, while the positive input terminal is not connected to an input signal. Thus, a symmetrical arrangement of first and second operational amplifiers is formed in the power receiving circuit.

[0039] It should be noted that the fifth resistor R5, the ninth resistor R9, the eighth resistor R8, and the fourth resistor R4 are all feedback resistors, and the second resistor R2, the sixth resistor R6, the seventh resistor R7, and the third resistor R3 are all input resistors. In each operational amplifier, the ratio of the feedback resistor to the input resistor is sufficient as long as the voltage value at the output end of the operational amplifier can be adjusted so that the corresponding MOS transistor in the first diode driving circuit 101 or the second diode driving circuit 103 is turned on while the other connected MOS transistor in the same diode driving circuit is turned off.

[0040] In some embodiments, the positive power supply terminal + of the first operational amplifier Amp1 and the positive power supply terminal + of the second operational amplifier Amp2 are both connected to the positive input terminal V+ of the load U1; the negative power supply terminal - of the first operational amplifier Amp1 and the negative power supply terminal - of the second operational amplifier Amp2 are both grounded; in order to control the offset of the signal at the negative output terminal of the first operational amplifier Amp1 and the signal at the negative output terminal of the second operational amplifier Amp2, the common-mode input terminal of the first operational amplifier Amp1 and the common-mode input terminal of the second operational amplifier Amp2 are both connected to a reference voltage signal, wherein the voltage value of the signal output by the negative output terminal - of the first operational amplifier Amp1 is less than the voltage value of the reference voltage signal input to the first operational amplifier Amp1, and the voltage value of the reference voltage signal input to the first operational amplifier Amp1 can be half the voltage value of the first power receiving terminal VD1. The resistance value of the fifth resistor R5 is equal to the resistance value of the ninth resistor R9, and the resistance value of the second resistor R2 is equal to the resistance value of the sixth resistor R6. The voltage value of the signal output by the negative output terminal of the second operational amplifier Amp2 is less than the voltage value of the reference voltage signal input to the second operational amplifier Amp1. The voltage value of the reference voltage signal input to the second operational amplifier Amp2 can be half the voltage value of the second power receiving terminal VD2. The resistance value of the fourth resistor R4 is equal to the resistance value of the eighth resistor R8, the resistance value of the seventh resistor R7 is equal to the resistance value of the third resistor R3, the resistance value of the eighth resistor R8 is equal to the resistance value of the ninth resistor R9, and the resistance value of the sixth resistor R6 is equal to the resistance value of the seventh resistor R7, making the operational amplifier control circuit 102 more symmetrical.

[0041] See Figure 1It can be seen that the two switching transistors with opposite polarities included in the first diode driving circuit 101 are the first NMOS transistor MN1 and the first PMOS transistor MP1, and the two switching transistors with opposite polarities included in the second diode driving circuit 103 are the second NMOS transistor MN2 and the second PMOS transistor MP2; the first diode driving circuit 101 also includes a first diode D1 and a second diode D2, the forward end of the first diode D1 is connected to the source of the first NMOS transistor MN1, the reverse end of the first diode D1 is connected to the drain of the first NMOS transistor MN1, the reverse end of the first diode D1 is connected to the forward end of the second diode D2, and the reverse end of the second diode D2 is connected to the drain of the first NMOS transistor MN1. The positive end of diode D2 is connected to the drain of the first PMOS transistor MP1, the reverse end of the second diode D2 is connected to the source of the first PMOS transistor MP1, and the gate of the first NMOS transistor MN1 is connected to the gate of the first PMOS transistor MP1. The gates of the first PMOS transistor MP1 and the first NMOS transistor MN1 are both control terminals of the switch transistor inside the first diode drive circuit 101. The reverse end of the first diode D1 and the forward end of the second diode D2 are both connected to the first power receiving terminal VD1. The forward end of the first diode D1 is connected to the negative input terminal V- of the load U1, and the negative end of the second diode D2 is connected to the positive input terminal V+ of the load U1. The second diode drive circuit 103 further includes a third diode D3 and a fourth diode D4. The forward end of the third diode D3 is connected to the source of the second NMOS transistor MN2, the reverse end of the third diode D3 is connected to the drain of the second NMOS transistor MN2, the reverse end of the third diode D3 is connected to the forward end of the fourth diode D4, the forward end of the fourth diode D4 is connected to the drain of the second PMOS transistor MP2, the reverse end of the fourth diode D4 is connected to the source of the second PMOS transistor MP2, and the gate of the second NMOS transistor MN2 is connected to the gate of the second PMOS transistor MP2. The gate of the second PMOS transistor MP2 and the gate of the first NMOS transistor MN1 are both control terminals of the switching transistors within the second diode drive circuit 103. The reverse end of the third diode D3 and the forward end of the fourth diode D4 are both connected to the second power receiving terminal VD2. The forward end of the third diode D3 is connected to the negative input terminal V- of the load U1, and the negative end of the fourth diode D4 is connected to the positive input terminal V+ of the load U1.

[0042] Based on the above embodiments, combined with Figure 1 It can be seen that the working principle of this application includes:

[0043] In one embodiment of positive power-on, the voltage value of the electrical signal at the first power supply terminal UD1 is the voltage value of the positive power supply terminal of the power supply device, and the voltage value of the electrical signal at the second power supply terminal UD2 is the voltage value of the negative power supply terminal of the power supply device. When the first power receiving terminal VD1 is connected to the first power supply terminal UD1 and the second power receiving terminal VD2 is connected to the second power supply terminal UD2, current flows from the first power receiving terminal VD1, through the diode D2, to the positive input terminal V+ of the load U1. If the load U1 is a chip, the chip's power supply terminal VCC is powered, and the current flows from V+ to V-, then through the diode D3 to the second power receiving terminal VD2, and back to the second power supply terminal UD2, forming a complete power supply circuit for the load U1. Preferably, the potential of the end where the resistor R1 is connected to the resistor R2 is higher than the potential of the end where the resistor R1 is connected to the resistor R3. After the load U1 is powered, the first operational amplifier Amp1 processes the electrical signal provided by the first power receiving terminal VD1 into a first electrical signal and feeds it back to the gate of the first PMOS transistor MP1 via the negative output terminal -. At this time, because the absolute value of the difference between the voltage value of the first electrical signal output by the negative output terminal - of the first operational amplifier Amp1 and the source voltage value of the corresponding switch transistor MP1 in the first diode drive circuit is greater than the first preset turn-on voltage threshold, the first PMOS transistor MP1 is turned on, and then the diode D2 is short-circuited. The discharge current of the first power supply terminal UD1 of the power supply device (considered as the first power receiving terminal VD1) does not flow through the diode D2 provided in the first diode drive circuit. The voltage transmitted from the first power receiving terminal VD1 is then applied to the positive input terminal V+ of the load via the first PMOS transistor MP1. Since the voltage difference between the source and drain of the first PMOS transistor MP1 is 0 Therefore, the voltage value of the first power supply terminal UD1 of the power supply device is equal to the voltage value of the positive input terminal V+ of the load U1. At the same time, the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of the first NMOS transistor MN1 in the first diode driving circuit 101 is less than the second preset conduction voltage threshold, and the first NMOS transistor MN1 is turned off. As a result, the electrical signal output by the first power receiving terminal VD1 is not applied to the negative input terminal V- of the load U1 through the first NMOS transistor MN1. Moreover, due to the unidirectional conductivity of the diode D1, the discharge current of the first power receiving terminal VD1 does not flow through the diode D1 provided in the first diode driving circuit. Therefore, the electrical signal transmitted by the first power supply terminal UD1 of the power supply device is not transmitted to the negative input terminal V- of the load through the diode D1. Therefore, the first power receiving terminal VD1 is not electrically connected to the negative input terminal V- of the load, thereby preventing the load from being burned due to reversed electrode connection.On this basis, the second operational amplifier Amp2 processes the electrical signal applied to its negative input terminal - into a second electrical signal with a voltage value lower than the first electrical signal and feeds it back to the gate of the second NMOS transistor of the second diode driving circuit 103 through the negative output terminal -, wherein the voltage value of the negative input terminal - of the second operational amplifier Amp2 is less than the voltage value at the first power supply terminal UD1 (regarded as the first power receiving terminal VD1); because the absolute value of the difference between the voltage value of the second electrical signal output from the negative output terminal of the second operational amplifier Amp2 and the source voltage value of the second NMOS transistor MN2 is greater than the second preset turn-on voltage threshold, then the second NMOS transistor MN2 is turned on and the diode D3 is short-circuited, and the current does not flow through the diodes D3 and D4 provided in the second diode driving circuit, but connects the second power receiving terminal VD2 to the negative input terminal V- of the load U1 through the second NMOS transistor MN2, so that the second power supply terminal of the power supply device is connected to the negative input terminal V- of the load U1. The voltage value of UD2 is equal to the voltage value of the negative input terminal V- of the load U1. Simultaneously, the absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of the second PMOS transistor MP2 is less than the first preset conduction voltage threshold, causing the second PMOS transistor MP2 to be turned off. Consequently, the electrical signal present at the second power supply terminal UD2 of the power supply device is not applied to the positive input terminal V+ of the load U1 through the second PMOS transistor MP2. When the voltage value at the positive input terminal V+ of the load U1 (considered to be equal to the voltage value at the first power supply terminal UD1), to which the positive terminal of diode D4 is connected (equal to the voltage value at the first power supply terminal UD1), is higher than the voltage value at the second power supply terminal UD2 (equivalent to the voltage value at the second power receiving terminal VD2), the unidirectional conductivity of diode D4 prevents current from flowing through diode D4. Consequently, the discharge current from the second power receiving terminal VD2 (or the second power supply terminal UD2 of the power supply device) does not flow through diode D4 within the second diode driver circuit to the positive input terminal V+ of the load U1. This achieves normal voltage stabilization and power-on of the load U1.

[0044] In one embodiment of reverse power-on, the voltage value of the electrical signal at the first power supply terminal UD1 is the voltage value of the positive electrode of the power supply device, the voltage value of the electrical signal at the second power supply terminal UD2 is the voltage value of the negative electrode of the power supply device, the first power receiving terminal VD1 is connected to the second power supply terminal UD2, and the second power receiving terminal VD2 is connected to the first power supply terminal UD1. The first power supply terminal UD1 discharges to the second power receiving terminal VD2. The discharge current flows from the second power receiving terminal VD2 and flows through the diode D4 to the positive input terminal V+ of the load U1. If the load U1 is a chip, the chip's power supply terminal VCC is powered. The current flows from V+ to V-, then flows through the diode D1 to the first power receiving terminal VD1, and then flows back to the second power supply terminal UD2, forming a complete power supply circuit for the load U1. Preferably, the potential of the end of the resistor R1 connected to the resistor R3 is higher than the potential of the end of the resistor R1 connected to the resistor R2. After power is supplied to the load U1, the second operational amplifier Amp2 processes the electrical signal provided by the second power receiving terminal VD2 into a first electrical signal, which is then fed back from the negative output terminal to the gate of the fourth PMOS transistor included in the second diode driver circuit 103. Because the absolute value of the difference between the voltage of the first electrical signal output by the negative output terminal - of the second operational amplifier Amp2 and the source voltage of the second PMOS transistor MP2 is greater than a first preset turn-on voltage threshold, the second PMOS transistor MP2 turns on. When the second PMOS transistor MP2 turns on, it short-circuits the diode D4, preventing the discharge current from the second power receiving terminal VD2 from flowing through the diode D4. The voltage transmitted from the first power supply terminal UD1 (considered as the second power receiving terminal VD2) of the power supply device is then applied to the positive input terminal V+ of the load via the second PMOS transistor MP2, thereby ensuring that the voltage at the first power supply terminal UD1 (considered as the voltage at the second power receiving terminal VD2) of the power supply device equals the voltage at the positive input terminal V+ of the load U1. At the same time, the absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of the second NMOS transistor MN2 is less than the second preset conduction voltage threshold, and the second NMOS transistor MN2 is turned off. As a result, the electrical signal output by the first power supply terminal UD1 of the power supply device (considered as the second power receiving terminal VD2) is not applied to the negative input terminal V- of the load U1 through the second NMOS transistor MN2, thereby preventing the load from being burned due to reversed electrode connection. Furthermore, due to the unidirectional conductivity of the diode D3, the discharge current of the second power receiving terminal VD2 does not flow through the diode D3. Therefore, the electrical signal transmitted by the first power supply terminal UD1 of the power supply device is not transmitted to the negative input terminal V- of the load through the diode D3, and the second power receiving terminal VD2 is not electrically connected to the negative input terminal V- of the load.On this basis, the first operational amplifier Amp1 processes the electrical signal applied to the negative input terminal - of the first operational amplifier Amp1 into a second electrical signal with a voltage lower than the first electrical signal and feeds it back to the gate of the first NMOS transistor MN1 through the negative output terminal -, wherein the voltage value of the negative input terminal - of the first operational amplifier Amp1 is less than the voltage value at the second power receiving terminal VD2; because the absolute value of the difference between the voltage value of the second electrical signal output by the negative output terminal of the first operational amplifier Amp1 and the source voltage value of the first NMOS transistor MN1 is greater than the second preset turn-on voltage threshold, the first NMOS transistor MN1 is turned on. When N1 is turned on, the diode D1 is short-circuited, and the current passes through the first NMOS transistor MN1 to connect the first power receiving terminal VD1 with the negative input terminal V- of the load U1, so that the voltage value of the first power supply terminal UD1 of the power supply device is equal to the voltage value of the negative input terminal V- of the load U1; and because the absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of the first PMOS transistor MP1 is less than the first preset turn-on voltage threshold, the first PMOS transistor MP1 is turned off, and the electrical signal existing at the first power receiving terminal VD1 is not applied to the positive input terminal V+ of the load U1 through the switch transistor MP1, thereby avoiding the load being burned due to the reverse connection of the electrodes. When the voltage at the positive input terminal V+ of the load U1 connected to the positive terminal of the diode D2 is higher than the voltage at the first power supply terminal UD1 (equivalent to the voltage at the first power receiving terminal VD1), the unidirectional conductivity of the diode D2 prevents current from flowing through the diode D2. Therefore, the discharge current at the first power receiving terminal VD1 (or the first power supply terminal UD1 of the power supply device) does not flow through the diode D2 within the first diode drive circuit to the positive input terminal V+ of the load U1, thereby preventing the load from being burned due to reversed electrode connection.

[0045] In summary, compared with the prior art, the present application does not require the built-in program to identify the positive and reverse connection of the corresponding power supply port in advance when the power supply device is electrically connected to the power receiving working circuit through an interface. As long as the cigarette rod and cigarette cartridge are matched and the power supply circuit and power supply port in the cigarette cartridge are fixed, it can be plugged in and powered on regardless of whether it is connected forward or reverse, thereby speeding up the atomization speed of the smoke source, making it quick and convenient to inhale the electronic cigarette, and improving the smoker's experience; overcoming the inconvenience of the prior art that requires chips for blind plug detection, the operational amplifier built into the power receiving working circuit is inexpensive, has a large product volume and a wide range of products, and its performance indicators are suitable for outputting general high and low levels for driving the switch tube to turn on and off.

[0046] Based on the aforementioned embodiments, an electronic atomization terminal is also disclosed, which includes a power supply device, a load, and the power receiving working circuit disclosed in the aforementioned embodiments, wherein the power supply device is plugged into the power receiving working circuit through an interface, or the power receiving working circuit is plugged into the power supply device through an interface. In some embodiments, the electronic atomization terminal includes a cigarette rod and a cigarette cartridge, the cigarette rod is provided with a parent interface, and the cigarette cartridge is provided with a pluggable female interface, then the electronic atomization terminal can be plugged and assembled in the form of a cigarette rod and cigarette cartridge combination; wherein, the power supply device is arranged in the cigarette rod, and the power receiving working circuit and the load are arranged in the cigarette cartridge, so that when the cigarette rod is plugged into the cigarette cartridge, the power supply device is connected to the power receiving working circuit; wherein, the load is used to receive the power provided by the power supply device when the power supply device is connected to the power receiving working circuit in the forward direction or in the reverse direction, so as to realize continued atomization of the aerosol source. Therefore, when the cigarette rod and the cigarette cartridge are electrically connected, there is no need to use the built-in program to first identify the positive and reverse connection of the corresponding power supply port. As long as the cigarette rod and the cigarette cartridge are matched and the power supply circuit and the power supply port in the cigarette cartridge are fixed, they can be plugged in and powered on regardless of whether they are connected in the positive or reverse direction. This speeds up the atomization speed of the smoke source, makes it quick and convenient to inhale the electronic cigarette, and improves the smoker's experience. It overcomes the inconvenience of blind plug detection of the chip in the existing technology. The operational amplifier built into the power receiving working circuit is low in price, has a large product volume and a wide range of products, and its performance indicators are suitable for outputting general high and low levels for driving the switch tube to turn on and off.

[0047] Preferably, the power supply device is provided with a first communication terminal, and the load is also provided with a second communication terminal coupled to the first communication terminal. The load is also used to exchange data with the power supply device through the second communication terminal after power-on, so that the power supply device can adjust the electrical signal provided by the first power supply terminal and the electrical signal provided by the second power supply terminal. The power supply device can be a portable terminal device such as a power adapter or a smart phone. The load can be a heating cell or a cigarette cartridge chip. For example, the power supply device and the load communicate through an I2C bus, or communicate by sending fixed pulses through a single-line protocol to meet the power supply voltage requirement of the load U1. There is no need to use an additional MCU to monitor the plugging and unplugging of the charging interface, which simplifies the circuit structure.

[0048] It should be understood that the specific embodiments described herein are intended only to explain the present application and are not intended to limit the present application. Furthermore, for ease of description, the accompanying drawings only illustrate portions, rather than all, of the structures relevant to the present application. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without inventive effort are intended to fall within the scope of protection of this application.

[0049] The terms "first," "second," and the like in this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0050] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Claims

1. A power receiving circuit that supports forward and reverse connection, wherein the power receiving end of the power receiving circuit is used to supply power to the power supply end of the power supply device, and the power receiving circuit is electrically connected to the load; characterized in that: The power receiving working circuit includes a first diode driving circuit, a second diode driving circuit, and an operational amplifier control circuit; The first diode driving circuit and the second diode driving circuit are both connected to the operational amplifier control circuit; an operational amplifier control circuit, configured to control the first diode drive circuit, the second diode drive circuit, and the load to form an electrical path when the power supply device is forward-connected to the power receiving working circuit and when the power supply device is reverse-connected to the power receiving working circuit, so that the power supply device supplies power to the load through the power receiving working circuit; The power receiving end of the power receiving working circuit includes a first power receiving end and a second power receiving end, and the power supply end of the power supply device includes a first power supply end and a second power supply end; an operational amplifier control circuit for, when the power supply device is forward-connected to the powered working circuit, sequentially determining the direction of current flow in the diode provided in the first diode drive circuit and the diode provided in the second diode drive circuit by processing the electrical signal provided by the first power supply terminal of the power supply device, so as to apply the electrical signal provided by the first power supply terminal of the power supply device to the positive input terminal of the load and form an electrical path between the negative input terminal of the load and the second power supply terminal of the power supply device; The operational amplifier control circuit is further configured to, when the power supply device is reversely connected to the power receiving working circuit, determine the direction of current flow in the diode provided in the second diode drive circuit and the diode provided in the first diode drive circuit by processing the electrical signal provided by the second power supply terminal of the power supply device, so as to apply the electrical signal provided by the second power supply terminal of the power supply device to the positive input terminal of the load, and to form an electrical path between the negative input terminal of the load and the first power supply terminal of the power supply device; The first diode driving circuit includes a pair of diodes connected end to end, and a switch tube connected to the positive and negative ends of each diode; The operational amplifier control circuit includes a first operational amplifier and a second operational amplifier; The common end of the diodes connected end to end in the first diode driving circuit is the first power receiving end, the control end of the switch tube included in the first diode driving circuit is connected to the negative output end of the first operational amplifier, and the negative input end of the first operational amplifier is connected to the first power receiving end via a resistor; The common end of the diodes connected end to end in the second diode driving circuit is the second power receiving end, the control end of the switch tube included in the second diode driving circuit is connected to the negative output end of the second operational amplifier, and the negative input end of the second operational amplifier is connected to the second power receiving end through a resistor; The negative input terminal of the first operational amplifier and the negative input terminal of the second operational amplifier are connected via a resistor to form a path between the negative input terminal of the first operational amplifier and the negative input terminal of the second operational amplifier and generate a voltage difference; The negative input terminal of the first operational amplifier is also connected to the positive output terminal of the first operational amplifier through a feedback resistor (R5) to form a feedback loop, and the negative output terminal of the first operational amplifier is also connected to the negative output terminal of the first operational amplifier through a feedback resistor (R9) to form another feedback loop.

2. The power receiving working circuit according to claim 1, characterized in that: The first operational amplifier is configured to, when the first power receiving end is connected to the first power supply end and the second power receiving end is connected to the second power supply end, process the electrical signal provided by the first power supply end into a first electrical signal and feed it back to the first diode drive circuit via the negative output end, so as to prevent the discharge current of the first power supply end of the power supply device from flowing through the diode provided in the first diode drive circuit, and then apply the voltage transmitted by the first power supply end of the power supply device to the positive input end of the load via the switch tube; a second operational amplifier, configured to, when the first power receiving terminal is connected to the first power supply terminal and the second power receiving terminal is connected to the second power supply terminal, process the electrical signal applied to its negative input terminal into a second electrical signal having a voltage value lower than the first electrical signal, and feed the second electrical signal back through the negative output terminal to the second diode drive circuit, so that current does not flow through the diode provided in the second diode drive circuit. The second operational amplifier then applies the electrical signal transmitted from the second power supply terminal of the power supply device to the negative input terminal of the load via the switching tube; Among them, the first power supply end is the positive power pole of the power supply device, the second power supply end is the negative power pole of the power supply device, and when the first power receiving end is connected to the first power supply end and the second power receiving end is connected to the second power supply end, the power supply device is forward connected to the power receiving working circuit.

3. The power receiving working circuit according to claim 2, characterized in that: The first diode driving circuit includes two switching tubes with opposite polarities, and the second diode driving circuit includes two switching tubes with opposite polarities; The absolute value of the difference between the voltage value of the first electrical signal output by the negative output terminal of the first operational amplifier and the source voltage value of a corresponding switch tube in the first diode driving circuit is greater than a first preset turn-on voltage threshold, so that the voltage value of the first power supply terminal of the power supply device is equal to the voltage value of the positive input terminal of the load; The absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switch in the first diode driving circuit is less than the second preset conduction voltage threshold, so that the electrical signal output by the first power supply terminal of the power supply device is not applied to the negative input terminal of the load; The absolute value of the difference between the voltage value of the second electrical signal output from the negative output terminal of the second operational amplifier and the source voltage value of one of the switching tubes in the second diode driving circuit is greater than the second preset conduction voltage threshold, so that the voltage value of the second power supply terminal of the power supply device is equal to the voltage value of the negative input terminal of the load; The absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of another switching tube in the second diode driving circuit is less than the first preset conduction voltage threshold, so that the electrical signal existing at the second power supply end of the power supply device is not applied to the positive input end of the load.

4. The power receiving working circuit according to claim 1, characterized in that: The second operational amplifier is configured to, when the first power receiving end is connected to the second power supply end and the second power receiving end is connected to the first power supply end, process the electrical signal provided by the first power supply end into a first electrical signal and feed the first electrical signal back to the second diode drive circuit via the negative output end, so that the discharge current of the first power supply end of the power supply device does not flow through the diode provided in the second diode drive circuit, and the electrical signal transmitted by the first power supply end of the power supply device is applied to the positive input end of the load; a first operational amplifier configured to process an electrical signal applied to its negative input terminal into a second electrical signal having a voltage value lower than the first electrical signal, and to feed the second electrical signal back to the first diode drive circuit from its negative output terminal when the first power receiving terminal is connected to the second power supply terminal and the second power receiving terminal is connected to the first power supply terminal, so that current does not flow through the diode provided in the first diode drive circuit and the electrical signal transmitted from the second power supply terminal of the power supply device is applied to the negative input terminal of the load, wherein the voltage value of the electrical signal at the second power supply terminal of the power supply device is lower than the voltage value of the second electrical signal; and the voltage value of the electrical signal at the first power supply terminal is greater than the voltage value of the electrical signal at the second power supply terminal; Among them, the first power supply end is the positive power pole of the power supply device, the second power supply end is the negative power pole of the power supply device, and when the first power receiving end is connected to the second power supply end and the second power receiving end is connected to the first power supply end, the power supply device is reversely connected to the power receiving working circuit.

5. The power receiving working circuit according to claim 4, characterized in that: The first diode driving circuit includes two switching tubes with opposite polarities, and the second diode driving circuit includes two switching tubes with opposite polarities; The absolute value of the difference between the voltage value of the first electrical signal output by the second operational amplifier and the source voltage value of a corresponding switch tube in the second diode driving circuit is greater than a first preset turn-on voltage threshold, so that the voltage value of the first power supply terminal of the power supply device is equal to the voltage value of the positive input terminal of the load; The absolute value of the difference between the voltage value of the first electrical signal and the source voltage value of another switch tube in the second diode driving circuit is less than the second preset conduction voltage threshold, so that the electrical signal output by the first power supply terminal of the power supply device is not applied to the negative input terminal of the load; The absolute value of the difference between the voltage value of the first electrical signal output by the first operational amplifier and the source voltage value of one of the switching tubes in the first diode driving circuit is greater than the second preset conduction voltage threshold, so that the voltage value of the second power supply terminal of the power supply device is equal to the voltage value of the negative input terminal of the load; The absolute value of the difference between the voltage value of the second electrical signal and the source voltage value of another switching tube in the first diode driving circuit is less than the first preset conduction voltage threshold, so that the electrical signal existing at the second power supply end of the power supply device is not applied to the positive input end of the load.

6. The power receiving working circuit according to claim 2 or 4, characterized in that: The operational amplifier control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor; the first operational amplifier and the second operational amplifier are both differential operational amplifiers; The first power receiving end is connected to the second power receiving end through a first resistor to form a power supply loop among the first power supply end, the first power receiving end, the second power supply end, and the second power receiving end; One end of the second resistor is connected to the first power receiving terminal, the other end of the second resistor is connected to the negative input terminal of the first operational amplifier, the positive output terminal of the first operational amplifier is connected to the negative input terminal of the first operational amplifier through a fifth resistor, one end of the sixth resistor is grounded, the other end of the sixth resistor is connected to the positive input terminal of the first operational amplifier, and the negative output terminal of the first operational amplifier is connected to the positive input terminal of the first operational amplifier through a ninth resistor; One end of the third resistor is connected to the second power receiving terminal, the other end of the third resistor is connected to the negative input terminal of the second operational amplifier, the positive output terminal of the second operational amplifier is connected to the negative input terminal of the second operational amplifier through the fourth resistor, one end of the seventh resistor is grounded, the other end of the seventh resistor is connected to the positive input terminal of the second operational amplifier, and the negative output terminal of the second operational amplifier is connected to the positive input terminal of the second operational amplifier through the eighth resistor.

7. The power receiving working circuit according to claim 6, characterized in that: The positive power supply terminal of the first operational amplifier and the positive power supply terminal of the second operational amplifier are both connected to the positive input terminal of the load; the negative power supply terminal of the first operational amplifier and the negative power supply terminal of the second operational amplifier are both grounded; the common mode input terminal of the first operational amplifier and the common mode input terminal of the second operational amplifier are both connected to the reference voltage signal; wherein the voltage value of the signal outputted by the negative output terminal of the first operational amplifier is less than the voltage value of the reference voltage signal inputted by the first operational amplifier, the resistance value of the fifth resistor is equal to the resistance value of the ninth resistor, and the resistance value of the second resistor is equal to the resistance value of the sixth resistor; Among them, the voltage value of the signal output from the negative output terminal of the second operational amplifier is less than the voltage value of the reference voltage signal input to the second operational amplifier, the resistance value of the fourth resistor is equal to the resistance value of the eighth resistor, the resistance value of the seventh resistor is equal to the resistance value of the third resistor, the resistance value of the eighth resistor is equal to the resistance value of the ninth resistor, and the resistance value of the sixth resistor is equal to the resistance value of the seventh resistor.

8. The power receiving working circuit according to claim 7, characterized in that: The two switching transistors with opposite polarities included in the first diode driving circuit are respectively a first NMOS transistor and a first PMOS transistor, and the two switching transistors with opposite polarities included in the second diode driving circuit are respectively a second NMOS transistor and a second PMOS transistor; The first diode drive circuit further includes a first diode and a second diode, wherein the forward end of the first diode is connected to the source of the first NMOS transistor, the reverse end of the first diode is connected to the drain of the first NMOS transistor, the reverse end of the first diode is connected to the forward end of the second diode, the forward end of the second diode is connected to the drain of the first PMOS transistor, the reverse end of the second diode is connected to the source of the first PMOS transistor, and the gate of the first NMOS transistor is connected to the gate of the first PMOS transistor, wherein the gate of the first PMOS transistor and the gate of the first NMOS transistor are both control terminals of the switch transistor within the first diode drive circuit, the reverse end of the first diode and the forward end of the second diode are both connected to the first power receiving terminal; the forward end of the first diode is connected to the negative input terminal of the load, and the negative end of the second diode is connected to the positive input terminal of the load; The second diode drive circuit also includes a third diode and a fourth diode, wherein the forward end of the third diode is connected to the source of the second NMOS transistor, the reverse end of the third diode is connected to the drain of the second NMOS transistor, the reverse end of the third diode is connected to the forward end of the fourth diode, the forward end of the fourth diode is connected to the drain of the second PMOS transistor, the reverse end of the fourth diode is connected to the source of the second PMOS transistor, and the gate of the second NMOS transistor is connected to the gate of the second PMOS transistor, wherein the gate of the second PMOS transistor and the gate of the first NMOS transistor are both control terminals of the switch transistor inside the second diode drive circuit, the reverse end of the third diode and the forward end of the fourth diode are both connected to the second power receiving terminal; the forward end of the third diode is connected to the negative input terminal of the load, and the negative end of the fourth diode is connected to the positive input terminal of the load.

9. An electronic atomization terminal, characterized in that: The electronic atomization terminal includes a power supply device, a load and the power receiving working circuit described in any one of claims 1 to 8, wherein the power supply device is plugged into the power receiving working circuit through an interface, or the power receiving working circuit is plugged into the power supply device through an interface.

10. The electronic atomization terminal according to claim 9, characterized in that: The electronic atomization terminal includes a cigarette rod and a cigarette cartridge. The cigarette rod is provided with a male interface, and the cigarette cartridge is provided with a pluggable female interface. The power supply device is arranged in the cigarette rod, and the power receiving working circuit and the load are arranged in the cigarette cartridge, so that when the cigarette rod is inserted into the cigarette cartridge, the power supply device is connected to the power receiving working circuit; The load is used to receive power provided by the power supply device when the power supply device is connected to the power receiving working circuit in the forward direction or the reverse direction, so as to continue atomizing the aerosol source.

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