398 results about "Dividing circuits" patented technology

The invention discloses a conversion circuit for measuring time sequence arc delay of a standard unit, which belongs to the field of integrated circuits and comprises a time sequence arc delay clock generation circuit of the standard unit, a clock frequency dividing circuit, a control module and an IO output module. The standard unit time sequence arc delay clock generation circuit connects a plurality of same standard units in series to form a test chain, delays the time sequence arc of a single standard unit, and outputs the time sequence arc in a stable-frequency clock form; the clock frequency division circuit performs frequency division on the stable clock generated by the standard unit time sequence arc delay clock generation circuit through an algorithm, so that the stable clock can be detected by a machine table; the control module selects a plurality of standard cell types from the control signal, selects a time sequence arc, selects a cascade stage number, and controls the output of the clock frequency dividing circuit; and the IO output module outputs the frequency-divided clock generated on the chip through an IO port so as to be detected by a machine. According to the invention, extra power consumption, area and design complexity caused by an extra on-chip high-frequency clock can be effectively avoided.

The invention discloses an electrostatic protection circuit and method, equipment and a storage medium, and relates to the technical field of electrostatic protection, and the circuit comprises a metal sheet connecting plug, an electrostatic discharge circuit, an electrostatic sampling circuit and a microcontroller; the metal sheet connecting plug is electrically connected with the metal sheet, the electrostatic discharge circuit and the electrostatic sampling circuit respectively; the electrostatic sampling circuit comprises a voltage division circuit and a conditioning circuit, and the voltage division circuit is electrically connected with the metal sheet connecting plug and the conditioning circuit; and the microcontroller is in communication connection with the electrostatic sampling circuit and the electrostatic discharge circuit and is used for performing analog-to-digital conversion on the output voltage of the conditioning circuit to obtain electrostatic voltage and controlling the electrostatic discharge circuit to be switched on or switched off. The static voltage of the operator can be acquired in real time through the microcontroller so as to accurately judge whether the static discharge of the current operator is in place or not, so that the condition of hot-line operation of corresponding equipment when the static discharge is insufficient is reduced, and the accuracy and reliability of the static discharge are improved.

The invention discloses a broadband low-power-consumption receiving and transmitting shared phase shifter which comprises a differential signal common port, a frequency sampling and control circuit, a dual-mode orthogonal generation circuit and a passive vector modulation synthesis circuit. The differential signal common port comprises a common input / output port interface of RF + and RF-differential radio frequency signals; the frequency sampling and control circuit is composed of a frequency sampling circuit, a frequency detection circuit and a logic control unit. The dual-mode orthogonal generation circuit is composed of a frequency selection change-over switch, a multi-phase filter, a coupling transformer, a matching network 1 and a matching network 2. The passive vector modulation synthesis circuit is composed of two passive vector modulation arrays and two combining / power dividing circuits.

The invention relates to the technical field of semiconductor design and manufacturing, in particular to an operation method and a design method of a multi-core chip and the multi-core chip. According to the technical scheme, circuit logics which can accept manufacturing defects are divided into the first logic group, and circuit logics which cannot accept manufacturing defects are divided into the second logic group; by reading the defect state of at least one computing core on the multi-core chip, the availability of a first logic group capable of accepting manufacturing defects in the computing core can be determined; and when the defect state indicates that the first logic group is unavailable, configuring a control register in the computing core to close the first logic group, and keeping a second logic group which is not accepted to manufacture defects in the computing core in a running state without influencing the functional circuit logic of the computing core. According to the technical scheme, the circuit logic, capable of accepting manufacturing defects, of the multi-core chip still has usability when the manufacturing defects occur, and the overall yield of manufacturing of the multi-core chip is improved in a disguised mode.

The invention relates to the technical field of photoelectric detection, and provides a single-photon counter circuit for weak light detection based on a photomultiplier, and the single-photon counter comprises a photoelectric conversion circuit, a differential amplification circuit, a threshold comparison circuit and a signal shaping circuit. The photoelectric conversion circuit is composed of a photomultiplier, a high-voltage power supply circuit and a voltage division circuit, detects weak light signals and outputs two paths of current signals through photoelectric conversion. The differential amplification circuit carries out differential amplification on the two current signals through a differential amplifier. The threshold comparison circuit compares two input signals, filters out signals with the amplitude lower than 1 / 2 of a set threshold, and outputs a single-path effective signal. And the signal shaping circuit shapes the effective signal and finally outputs the effective signal in a TTL pulse mode. According to the single photon counter circuit for weak light detection, the background dark counting rate is low, the sensitivity is high, and the counting unit module specially used for digital pulse statistics is connected behind the single photon counter circuit for counting single photons.

The utility model discloses a sine pulse width modulation circuit and a switching power supply, and the circuit comprises a sine wave generation circuit which comprises a voltage division circuit, an RC oscillation circuit, a differential comparison amplification circuit, and a gating circuit; the voltage division circuit is used for carrying out voltage division processing on power supply voltage input by the input end of the sine pulse width modulation circuit and then outputting a direct-current voltage signal; the RC oscillating circuit is used for converting the direct-current voltage signal into an alternating-current oscillating signal and outputting the alternating-current oscillating signal; the differential comparison amplification circuit is used for comparing and amplifying the AC oscillation signal and the DC voltage signal and then outputting an AC voltage signal; the gating circuit is used for gating the AC voltage signal and then outputting a sine wave signal; the negative half-cycle rectifying circuit is used for overturning and rectifying a negative half-cycle signal in the sine wave signal and then outputting the negative half-cycle signal; and the positive half-cycle rectifying circuit is used for overturning and rectifying a positive half-cycle signal in the sine wave signal and then outputting the positive half-cycle signal. According to the utility model, the cost, volume and weight of the product can be reduced.

A hybrid switching converter with a single inductor and multiple outputs is disclosed for converting an input voltage to a first output voltage and a second output voltage. The hybrid switching converter includes a sub-switching converter configured to convert the input voltage to an intermediate voltage, and first and second output switches configured to respectively convert the intermediate voltage to the first and second output voltages. An inductor has one terminal coupled to a switched-capacitor voltage dividing circuit and another terminal coupled to a second voltage. Under different configurations, the inductor is coupled to either a negative terminal or a positive terminal of a first capacitor, thereby converting the first voltage to either half the first voltage and a reference potential, or the first voltage and half the first voltage. The first voltage and the second voltage respectively correspond to one of the input voltage and the intermediate voltage.

The application discloses a DC-DC converter circuit based on over-temperature protection threshold adjustment, and an over-temperature detection module comprises: a first transistor circuit, the base of the transistor is connected with the reference voltage VBG output end of a band gap reference module, a positive temperature coefficient voltage proportional to absolute temperature is generated; a voltage dividing circuit input end is connected with the positive temperature coefficient voltage output end, the positive temperature coefficient voltage is divided to generate a detection voltage; a second transistor circuit, the base of the transistor is connected with the detection voltage output end, an over-temperature protection signal OTP is output to shut down the main circuit of the converter; an adjustment resistance circuit receives a digital adjustment signal; the digital adjustment signal changes the voltage dividing ratio of the positive temperature coefficient voltage divided to the detection voltage by controlling the equivalent resistance value of the adjustment resistance circuit; the change direction of the voltage dividing ratio is opposite to the change direction of the reference voltage VBG caused by adjustment. The application significantly improves the accuracy, consistency and overall reliability of the over-temperature protection threshold.

The invention discloses an electrolytic capacitor polarity detection circuit, a detection method and a detection device. The detection circuit comprises a test interface used for connecting an electrolytic capacitor; the voltage division circuit is used for outputting sampling voltage; the voltage comparison circuit is used for comparing the sampling voltage with the reference voltage; the isolation circuit is used for outputting a level signal according to the comparison result; the judgment unit is used for judging whether the polarity of the electrolytic capacitor is reversed according to the level signal. The sampling voltage is compared with the reference voltage through the voltage comparison circuit; and meanwhile, the isolation circuit is arranged to realize electrical isolation, the circuit is protected, and a level signal is converted through the isolation circuit and transmitted to the judgment unit. The judgment unit judges whether the polarity of the electrolytic capacitor is reverse according to the level signal. Through the design, the problem of reverse connection of the electrolytic capacitor of the electric meter can be quickly identified in the production stage, and abnormal electric meters are screened out; the detection efficiency is high, the quality of outgoing products is improved, and the failure rate of the electric meter is remarkably reduced.

The utility model provides a relay switch control circuit and a relay output type PLC controller, and the relay switch control circuit comprises a relay which comprises a coil, a first contact and a second contact, and the coil is used for controlling the opening and closing of the first contact and the second contact; the load loop power supply input terminal is connected with the first contact and is used for being connected with an external power supply through an external load; the load loop power supply common terminal is connected with the second contact and is used for being connected with an external power supply; the voltage division circuit is connected with the load loop power supply input terminal; the isolation circuit is connected with the load loop power supply common terminal; the feedback circuit is respectively connected with the voltage division circuit and the isolation circuit; the external power supply is an alternating current power supply, the first contact and the second contact are closed, and the signal output end of the feedback circuit outputs a first signal; the external power supply is an alternating current power supply, the first contact and the second contact are disconnected, and the signal output end outputs a second signal. According to the utility model, the reliability of AC control is improved.

The invention relates to the technical field of chip testing, and discloses a circuit, method, device and system for measuring the voltage of a chip pin, and the circuit comprises a relay circuit which can be in a first state or a second state through a control signal; when the relay circuit is in the first state, the chip pin is directly connected with the ATE test channel through the relay circuit; the voltage division circuit is provided with a test end, a sampling end and a reference end; and when the relay circuit is in the second state, the test end is connected with the chip pin through the relay circuit, the sampling end is connected with the ATE test channel through the relay circuit, and the reference end is connected with the reference voltage. And when the relay circuit is in the second state, the voltage of the sampling end can be adjusted to a measurable range of the ATE test channel through the voltage division circuit and the reference voltage, so that the high voltage and the negative voltage exceeding the measuring range at the chip pin can be obtained through calculation.

This application discloses an MCU sleep / wake-up circuit, including a signal circuit, a second sleep control transistor Q2, a first hierarchical sleep control transistor Q1, an LDO chip U, and a control unit MCU. The signal circuit outputs a wake-up signal. The base of the second sleep control transistor Q2 is connected to the output terminal of the signal circuit through a current-limiting resistor R4, grounded through a voltage divider resistor R9, and connected to the enable terminal ENA through a current-limiting resistor R3. The enable terminal ENA is connected to the control unit MCU, the emitter is grounded, and the collector outputs a control signal. The control signal is input to the first hierarchical sleep control transistor Q1 through a bias voltage divider circuit. The emitter of the first sleep control transistor Q1 is connected to the power supply VIN, and the collector outputs the power supply voltage to the LDO chip U. The LDO chip U outputs its operating voltage to the control unit MCU. When the control unit MCU is working, it outputs a high level to the enable terminal ENA. This application can reduce the complexity of the sleep / wake-up system and achieve low-power sleep and reliable wake-up of the control unit MCU.

The utility model relates to a PD detection alarm protection circuit of a laser. The PD detection alarm protection circuit comprises a PD sensor, a resistance voltage division circuit, an in-phase proportion amplification circuit, a comparator circuit and a voltage reference circuit, the PD sensor collects a PD photocurrent signal of the laser and then sends the PD photocurrent signal to the resistance voltage division circuit; the resistance voltage division circuit converts the PD photocurrent signal into a PD voltage signal and then sends the PD voltage signal to the in-phase proportion amplification circuit; the in-phase proportional amplification circuit amplifies the PD voltage signal and then transmits the PD voltage signal to one input end of the comparator circuit, the other input end of the comparator circuit is connected with the voltage reference circuit, and the output end of the comparator circuit outputs a processed PD signal; by optimizing a pre-stage amplification framework and a post-stage reference design, the detection reliability is remarkably improved while the cost is reduced, and the detection response speed is very high. And real-time monitoring can be realized through an upper computer. The system is especially suitable for a safety protection system of industrial laser equipment.

This invention provides a reference voltage buffer circuit and calibration method for a high-precision analog-to-digital converter (ADC). The circuit includes a first operational amplifier whose inverting input is connected to a reference voltage, and whose output is fed back to the non-inverting input via a first driving transistor and a voltage divider circuit. A second operational amplifier's non-inverting input is connected to a first voltage divider node, its inverting input is connected to a second voltage divider node, and its output is connected to the gates of several third driving transistors and a second driving transistor. The drains of the third driving transistors are all connected to the first voltage divider node via switches. The width-to-length ratios of the second driving transistors and the several third driving transistors are linearly related. The switches are all input with logic control signals to control their states for linear calibration of the reference voltage. This invention uses binary encoding to control the switch states for linear calibration of the output reference voltage and significantly reduces the total resistance by designing a linear relationship between the resistors, thus reducing chip area and cost.

A power supply device with high output stability includes a voltage divider circuit, a full bridge rectifier, a resonant capacitor, a first transformer, a second transformer, a first switch element, a second switch element, a third switch element, an output stage circuit, and a detection and control circuit. The first switch element selectively couples the second transformer to the first transformer. The second switch element selectively couples the output stage circuit to the first transformer. The third switch element selectively couples the output stage circuit to the second transformer. The detection and control circuit appropriately controls the first switch element, the second switch element, and the third switch element according to a divided voltage from the voltage divider circuit and a capacitive voltage from the resonant capacitor.

A shunt regulator is provided which can reduce a consumption current at the time of normal operation even if a circuit including a large current flowing at the time of operation is included. The shunt regulator includes a capacitor connected between an output terminal and a ground terminal, a voltage dividing circuit and an output transistor connected between the output terminal and the ground terminal, an error amplifier which controls the output transistor based on a voltage of an output terminal of the voltage dividing circuit and a reference voltage, a nonvolatile memory, a memory control circuit which outputs a read signal of data to the nonvolatile memory, and a voltage detection circuit which detects that the voltage of the output terminal reaches a prescribed voltage which allows a data read operation of the nonvolatile memory, outputs a detection signal to the memory control circuit, and an operation current of the nonvolatile memory is supplied from the capacitor.

The invention provides a temperature reading circuit, a correction method, a chip and electronic equipment, and relates to the technical field of temperature detection, the temperature reading circuit comprises a digital operation circuit and a double-slope integral analog-to-digital conversion circuit, and the double-slope integral analog-to-digital conversion circuit comprises a voltage division circuit, a charging and discharging switching circuit and a counting control circuit; the voltage division circuit divides the band-gap reference voltage to obtain a first reference voltage, a second reference voltage and a third reference voltage; the charging and discharging switching circuit determines a preset adjustment value; third reference voltage and second reference voltage are accessed in the first stage, first temperature detection voltage and second temperature detection voltage are accessed in the third stage, second reference voltage and first reference voltage are accessed in the second stage and the fourth stage, and a counting control circuit counts to obtain a first measurement value and a second measurement value; the digital operation circuit calculates a first calibration value according to the first measurement value, the second measurement value and a preset adjustment value; and obtaining a target temperature value according to the temperature deviation value. The cost is reduced, and the precision is improved.

The invention discloses a series electronic water gauge circuit based on PMOS (P-channel Metal Oxide Semiconductor) tubes. The series electronic water gauge circuit is characterized by comprising a plurality of cascaded water level monitoring sub-circuits which are arranged in series at equal intervals and a voltage division circuit. The water level monitoring sub-circuit cascade arranged in series at equal intervals comprises n stages of sub-circuits, n is greater than 1, and the structures of the sub-circuits of each stage are the same; the first-stage water level monitoring sub-circuit comprises an electronic switch M1, resistors S1 and R1, a monitoring electrode X1 and a water body resistor W1; the electronic switch is a PMOS (P-channel Metal Oxide Semiconductor) tube M1, a monitoring electrode X1 is simultaneously connected with a resistor R1 and a grid electrode of the PMOS tube M1, the other end of the resistor R1 is connected with a power supply VCC and a source electrode of the PMOS tube M1, one end of the resistor S1 is connected with a drain electrode of the PMOS tube M1, and the other end of the resistor S1 is connected to the voltage division circuit S0 to output a water level monitoring signal Vo. Compared with the prior art, the series type electronic water gauge circuit based on the PMOS tubes has the advantages that the electronic water gauge circuit based on the PMOS tubes is provided, and the electronic water gauge circuit of high-speed collection of a simple combination logic circuit is provided.

The invention discloses a temperature isolation sampling circuit, and relates to the field of electronic circuit design, and the circuit comprises a triangular wave circuit which generates a triangular wave with a fixed period according to a threshold value comparison result in a capacitor charging and discharging mode; the temperature sampling circuit is used for comparing the sampling voltage which is output by the thermistor voltage division circuit and changes along with the temperature with the triangular wave and outputting a PWM (Pulse Width Modulation) square wave signal of which the duty ratio changes along with the temperature; and configuring an optocoupler device to work in a switching state based on a non-linear region, and transmitting the PWM square wave signal to an isolation output circuit at a low-voltage side to realize electrical isolation transmission. The device supports electrical isolation and adapts to high-voltage occasions, and the isolation voltage range depends on selected isolation elements; according to the invention, the PWM is used for transmitting the temperature signal, when the temperature signal is interfered by an electromagnetic environment, the influence on the level amplitude does not change the duty ratio, and in addition, the cost of the device is also reduced.

The utility model discloses a residual electricity rapid discharge circuit suitable for high voltage input, which belongs to the technical field of power electronics and comprises a voltage stabilizing diode, a first triode and a second triode, the voltage stabilizing diode, a first resistor and a second resistor are sequentially connected in series to form a first-stage voltage division circuit, and the first-stage voltage division circuit is used for controlling the second triode. The sixth resistor, the third resistor, the fourth resistor and the fifth resistor are sequentially connected in series to form a second-stage voltage division circuit, the second-stage voltage division circuit is used for controlling the first triode, and the two ends of the first-stage voltage division circuit and the two ends of the second-stage voltage division circuit are connected between the power source positive electrode and the power source negative electrode respectively. Compared with the prior art, the residual electricity rapid discharge circuit serves as a part of a direct-current high-voltage power supply, when the input end of the direct-current power supply is powered off, the residual electricity rapid discharge circuit serves as a discharge loop to achieve input voltage discharge, the time needed by input voltage discharge can be effectively shortened, and the working reliability is improved.

The utility model relates to the technical field of surge protectors, in particular to a graphite gap N-PE surge protector, which is characterized in that the graphite gap N-PE surge protector comprises a shell, a graphite gap module and a circuit module, the graphite gap module and the circuit module are both arranged in the shell, and the graphite gap module is arranged in the shell. The graphite gap module is connected with the circuit module; the circuit module comprises a boosting transformer, a voltage doubling circuit, an energy storage capacitor and a voltage division circuit which are connected in sequence, the boosting transformer is connected with the two ends of the graphite gap module, and the voltage division circuit is used for providing multiple trigger voltages and enabling the multiple trigger voltages to be changed in a gradient decreasing mode in the graphite gap module. Compared with a traditional surge protector, the surge protector provided by the utility model reduces the residual voltage of the graphite gap, improves the voltage protection level, and meets the requirement of a graphite gap module for small block motion threshold discreteness.

The application relates to a master-slave architecture calibration circuit and an energy storage system. A plurality of primary controllers of the energy storage system comprises a master primary controller and a slave primary controller; the master-slave architecture calibration circuit is used for outputting a first calibration signal to the master primary controller and / or outputting a second calibration signal to the slave primary controller; wherein the first calibration signal is used for indicating that the master primary controller calibrates itself as a master control device, and the second calibration signal is used for indicating that the slave primary controller calibrates itself as a slave control device; wherein the master-slave architecture calibration circuit comprises a switching circuit, or comprises a multiplexing circuit and a power supply circuit, or comprises a voltage dividing circuit and the power supply circuit. By using the application, the master-slave architecture can be automatically calibrated through a hardware circuit, manpower is saved, and the debugging time is shortened.

The utility model provides a novel output short-circuit protection circuit and a switching power supply. The circuit comprises a sampling current input end, a rectification filter circuit, a first voltage stabilizer, a voltage division circuit, a second voltage stabilizer and a control chip. The rectifying and filtering circuit is used for rectifying and filtering a detection signal input by the sampling current input end; the rectified and filtered detection signal enters the voltage division circuit for voltage division after being higher than a set threshold value of the first voltage stabilizer; after the voltage-divided detection signal is higher than a set threshold value of the second voltage stabilizer, the detection signal enters a Det function pin of the control chip, and whether the circuit is in an output short-circuit state or not is judged according to a set protection value of the Det function pin. By introducing the voltage stabilizer, the Det function pin and the like, the short-circuit protection circuit independent of the CS pin is realized, a more efficient and accurate short-circuit protection function is realized, and the working reliability of the whole circuit is improved.

A fouling state detection circuit (10) that detects a fouling state of a first substrate of a power supply unit includes a first voltage divider circuit (22) that outputs a first divided voltage (V1) to a first node (N11). The first voltage division circuit (22) includes a first resistance circuit (24) connected between the first power supply terminal (18) and the first node (N11), and a first resistance element (R1) connected between the first node (N11) and the second power supply terminal (20). The first resistance circuit (24) includes a plurality of second wiring patterns (WP1-WP4) formed on the second substrate (11), and a plurality of second resistance elements (RA1-RA4) having mutually different resistance values. The plurality of second wiring patterns (WP1-WP4) have wiring widths that differ from each other and that are equal to or less than the wiring width of the first wiring pattern formed on the first substrate. The plurality of second resistance elements (RA1-RA4) are connected in series with the plurality of second wiring patterns (WP1-WP4), respectively, between the first power supply terminal (18) and the first node (N11). A fouling state detection circuit (10) detects a fouling state of the first wiring pattern on the basis of the first divided voltage (V1).

A circuit device and an electronic apparatus. The circuit device includes: a voltage division circuit that divides a voltage to be measured and outputs the divided voltage to a voltage division node; a comparison circuit that compares the voltage of the voltage division node with a reference voltage; and a control circuit. The voltage division circuit includes first to n-th resistors provided in series between a voltage node to be measured and a voltage division node, and first to n-th transistors in which an i-th transistor and an i-th resistor are connected in parallel. The control circuit sets the j-th transistor to one of ON and OFF, sets the first to (j-1)-th transistors to the other of ON and OFF, and outputs measurement data by determining the ON or OFF of the j-th transistor on the basis of the comparison result of the comparison circuit.

This invention provides a power-on detection circuit and a chip. An enable control circuit is added before the voltage divider circuit. During chip power-on, the enable control circuit outputs an enable control signal to enable the voltage divider circuit only after the power supply voltage reaches a first threshold. This avoids the problem of misjudgment by the comparator circuit due to the voltage divider circuit's voltage division establishment speed being equal to or faster than the reference voltage establishment speed. Thus, during chip power-on, problems such as the chip failing to start normally or irreversible damage caused by the output of the power-on detection circuit being incorrectly flipped can be avoided, thereby improving the chip's power-on safety and operational reliability.

The application discloses a multi-input source charging management system and electronic equipment, and relates to the technical field of charging management. The system comprises a micro control unit (MCU), a charging management integrated circuit and a first voltage dividing circuit. The MCU and the charging management integrated circuit are connected with respective communication pins. An ADC pin of the MCU is connected with an output end of the first voltage dividing circuit. A power input pin of the charging management integrated circuit is connected to an external power module. A charging output pin is connected with a positive pin of a battery to be charged. An input end of the first voltage dividing circuit is connected to the external power module. The charging management integrated circuit is internally provided with a register of configurable charging parameters, supports writing and configuration of the charging parameters through the communication pin, and the voltage dividing ratio of the first voltage dividing circuit is set to attenuate the voltage from the external power module to the input voltage range of the ADC pin. The application provides a basic hardware platform for supporting multiple input sources, reduces the cost, and has higher universality.

The application provides a reference voltage starting circuit, a direct current residual current detection device and a protection device, wherein the reference voltage starting circuit comprises a voltage dividing circuit, an operational amplifier, a push-pull circuit and an output capacitor circuit; the voltage dividing circuit is used for voltage dividing a received power supply voltage signal and inputting a voltage divided signal to the operational amplifier; the operational amplifier performs voltage following on the current reference voltage output by the reference voltage starting circuit and the voltage divided signal to obtain a control signal; the push-pull circuit controls the charging or discharging of the output capacitor circuit according to the control signal, so that the reference voltage starting circuit outputs a constant reference voltage to a current transformer. The application enhances the current driving capacity by setting the push-pull circuit, and the push-pull circuit has no overcurrent protection and can quickly drive the output capacitor circuit to power on. Compared with the scheme of directly adjusting the reference voltage by the operational amplifier, the capacitor power-on time of the application scheme is shorter, which is beneficial to the fast and stable excitation system of the current transformer.

The invention provides a power supply selection circuit and system.The power supply selection circuit comprises a control switch, a current mirror circuit, a voltage division circuit and a grid voltage regulation and control circuit and further comprises a first gating switch and a second gating switch, and when the control switch is turned on, the current mirror circuit can mirror the turn-on current of the control switch to the voltage division circuit; when the control switch is switched on, the first gating switch is switched on, the second gating switch is switched off, then the voltage which has the corresponding voltage difference with the first power supply is output at the first voltage drop node and provided for the first grounding end, and the voltage of the output end of the power supply selection circuit is equal to the voltage of the first power supply; when the first gating switch is switched off and the second gating switch is switched on, the voltage of the output end of the power supply selection circuit is equal to the voltage of the second power supply, so that dual-power supply selection is realized, the requirements of a system on wider power supply voltage or multi-mode work are met, and the circuit is simple in structure and low in cost.

The application provides a power supply circuit of an adaptive power supply and a power-using equipment, wherein the power supply circuit comprises a first power supply connecting groove and a second power supply connecting groove for placing a power supply, the power supply is a dry battery or a lithium battery, and the power supply circuit further comprises a voltage dividing circuit, a first controlled switch and a switching control circuit, so that when the power supply is the lithium battery, the voltage output by the voltage dividing circuit to the control end of the first controlled switch makes the first controlled switch conduct, the current power supply circuit can be automatically identified as being powered by the dry battery or the lithium battery through the design of the hardware circuit, and the series-parallel connection relationship of the power supply is automatically switched according to the type of the power supply to supply power to the power-using equipment, the damage of the subsequent circuit caused by the user's mistake of placing the lithium battery is avoided, the adaptive capacity of the power supply circuit to different power supplies is realized, the user experience is improved, the cost of the hardware circuit design is low, and the cost of the power supply circuit is reduced.