Control guide function generation circuit

Abstract

The embodiment of the utility model discloses a control guide function generating circuit, comprising a control module, a plurality of control sub-modules, each control sub-module comprising a light emitting diode; the optical coupling module comprises a plurality of optical coupling sub-modules, and each optical coupling sub-module comprises an optical coupling field effect transistor; and each optical coupling sub-module transmits an electric signal between the control sub-module corresponding to the optical coupling sub-module so as to conduct a path between the control sub-module and the optical coupling sub-module and generate a control guide function generation signal. The reference point of the control guide function generation circuit is the same as that of a system, a driving level conversion circuit can be omitted, direct driving by a micro-control unit is facilitated, and the control guide function generation circuit is convenient to use. By adopting the optical coupling module, two functions of generating the control guide function signal and disconnecting the control guide function generating circuit can be realized at the same time, and the purposes of few elements, simple circuit, small size, low cost and high reliability can be achieved to a great extent.

Description

Technical Field

[0001] The utility model relates to the field of vehicle-mounted chargers, in particular to a control and guidance function generating circuit. Background Art

[0002] On-board chargers (OBC) are widely used in new energy vehicles, including but not limited to pure electric new energy vehicles, plug-in hybrid new energy vehicles, hydrogen energy vehicles, etc.

[0003] At present, the control pilot function (CP) signal generating circuit is composed of a field effect tube switch circuit and a relay circuit. The field effect tube switch circuit is responsible for generating the CP signal, and the relay is responsible for completely disconnecting the CP signal generating circuit when not working. That is to say, three control signals, CP+ control signal, CP- control signal and relay are required. Among them, the relay switch is a mechanical switch, which opens or closes the mechanical contacts through electromagnetic drive. The number of switching times is limited and there is a life problem. In addition, the current CP+ and CP- signal reference points are different from the reference points of the entire system and cannot be directly driven by a micro control unit. It is necessary to control the CP+ and CP- signals by adding a drive level conversion circuit.

[0004] In the application of new energy vehicles, automotive electronic equipment is used in high temperature, large vibration, harsh working environment, and has high reliability requirements. However, the circuit contains two parts, namely switching circuit and relay circuit, with a large number of components, complex circuit, large size, high cost and poor reliability. Utility Model Content

[0005] The embodiment of the utility model provides a control and guidance function generating circuit, which realizes a control and guidance function signal generating circuit with a small number of components, a simple circuit, a small volume, a low cost and high reliability.

[0006] The embodiment of the utility model provides a control and guidance function generating circuit, comprising: a control module, comprising a plurality of control submodules, wherein the plurality of control submodules are connected in parallel, and each of the control submodules comprises a light emitting diode;

[0007] An optical coupling module, comprising a plurality of optical coupling sub-modules, wherein the plurality of optical coupling sub-modules are connected in parallel, and each of the optical coupling sub-modules comprises an optical coupling field effect transistor;

[0008] Each of the optical coupling sub-modules receives the electrical signal of the control sub-module corresponding to the optical coupling sub-module through the optical coupling isolation effect between the corresponding optical coupling field effect tube and any of the light-emitting diodes, so as to open the path between the control module and the optical coupling module and generate a control guidance function generation signal.

[0009] The multiple control submodules include a first control submodule and a second control submodule, wherein the light emitting diode corresponding to the first control submodule is a first light emitting diode, and the light emitting diode corresponding to the second control submodule is a second light emitting diode.

[0010] Wherein, the first control submodule includes: a first triode, a first resistor, a second resistor, a third resistor, and the first light-emitting diode; the second control submodule includes: a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and the second light-emitting diode; Wherein,

[0011] The first port of the first light emitting diode and the first port of the second light emitting diode are both connected to one end of a first power source;

[0012] The second port of the first light emitting diode is connected to the first port of the first resistor, the second port of the first resistor is connected to the collector of the first transistor, the base of the first transistor is connected to the first port of the second resistor and the first port of the third resistor, the second port of the third resistor is connected to the ground; the emitter of the first transistor is connected to the ground;

[0013] The second port of the second light-emitting diode is connected to the first port of the fourth resistor, the other end of the fourth resistor is connected to the collector of the second transistor, the base of the second transistor is connected to the first port of the fifth resistor and the first port of the sixth resistor, the second port of the sixth resistor is connected to the ground; the emitter of the second transistor is connected to the ground.

[0014] Among them, the control module also includes: a first control guidance function signal source and a second control guidance function signal source, wherein the first control guidance function signal source is connected to the second port of the second resistor, and the second control guidance function signal source is connected to the second port of the fifth resistor, and the first control guidance function signal source and the second control guidance function signal source are used to generate a high level signal or a low level signal.

[0015] Among them, the multiple optical coupling sub-modules include a first optical coupling sub-module and a second optical coupling sub-module, the optical coupling field effect transistors corresponding to the first optical coupling sub-module include: a first optical coupling field effect transistor and a second optical coupling field effect transistor, and the optical coupling field effect transistors corresponding to the second optical coupling sub-module include: a third optical coupling field effect transistor and a fourth optical coupling field effect transistor.

[0016] The first optical coupling submodule includes: the first optical coupling field effect transistor, the second optical coupling field effect transistor, and a seventh resistor; the second optical coupling submodule includes: the third optical coupling field effect transistor, the fourth optical coupling field effect transistor, and an eighth resistor;

[0017] The drain of the first optical coupling field effect transistor is connected to the port of the second power supply V2, the source of the first optical coupling field effect transistor is connected to the source of the second optical coupling field effect transistor, and the gate of the first optical coupling field effect transistor is connected to the gate of the second optical coupling field effect transistor;

[0018] The drain of the second optical coupling field effect transistor is connected to the first port of the seventh resistor, and the second port of the seventh resistor is connected to the output end of the control and guidance function generating circuit;

[0019] The drain of the third optical coupling field effect transistor is connected to the first port of the eighth resistor, and the second port of the eighth resistor is connected to the output end of the control and guidance function generating circuit;

[0020] The source of the third optical coupling field effect transistor is connected to the source of the fourth optical coupling field effect transistor, the gate of the third optical coupling field effect transistor is connected to the gate of the fourth optical coupling field effect transistor, and the drain of the fourth optical coupling field effect transistor is connected to the port of the third power supply V3;

[0021] The first optical coupling field effect transistor and the second optical coupling field effect transistor are connected to have a bidirectional isolation function; the third optical coupling field effect transistor and the fourth optical coupling field effect transistor are connected to have a bidirectional isolation function.

[0022] Wherein, when the first control guidance function signal source generates the high level signal and the second control guidance function signal source generates the low level signal, the first control submodule is turned on, and the first light-emitting diode generates the electrical signal to conduct the path between the first optical coupling submodule and the first control submodule, and when the second control submodule is not turned on and the second light-emitting diode is not turned on, the path between the second optical coupling submodule and the second control submodule is not conducted;

[0023] The output end of the control and guidance function generating circuit outputs a first control and guidance function generating signal, and the first control and guidance function generating signal is used to output the voltage input by the second power supply V2.

[0024] Wherein, when the first control and guidance function signal source generates the low-level signal and the second control and guidance function signal source generates the high-level signal, the first control submodule is not turned on, the first light-emitting diode is not turned on, the first optical coupling submodule is not turned on, and the second control submodule is turned on, and the second light-emitting diode generates the electrical signal to turn on the path between the second optical coupling submodule and the second control submodule;

[0025] The output end of the control and guidance function generating circuit outputs a second control and guidance function generating signal, and the second control and guidance function generating signal is used to output the voltage input by the third power supply V3.

[0026] Wherein, when the first control and guidance function signal source generates the low level signal and the second control and guidance function signal source generates the low level signal, the second control submodule is not turned on, and when the first control submodule is not turned on, the second light-emitting diode and the first light-emitting diode are not turned on, and the electrical signal cannot be generated, then the second optical coupling submodule and the first optical coupling submodule are not turned on;

[0027] The output end of the control and guidance function generating circuit is in a high impedance state.

[0028] Wherein, when the first control guidance function signal source generates the high level signal and the second control guidance function signal source generates the high level signal, the second control submodule and the first control submodule are both turned on, then the second light emitting diode and the first light emitting diode both generate the electrical signal to conduct the path between the first optical coupling submodule and the first control submodule and the path between the second optical coupling submodule and the second control submodule, then the second optical coupling submodule and the first optical coupling submodule are both turned on;

[0029] The output end of the control and guidance function generating circuit outputs 0V.

[0030] It can be seen that the embodiment of the utility model proposes a control and guidance function generating circuit, including: a control module, including multiple control sub-modules, the multiple control sub-modules are connected in parallel, and each of the control sub-modules includes a light-emitting diode; an optical coupling module, including multiple optical coupling sub-modules, the multiple optical coupling sub-modules are connected in parallel, and each of the optical coupling sub-modules includes an optical coupling field effect tube; each of the optical coupling sub-modules receives the electrical signal of the control sub-module corresponding to the optical coupling sub-module through the optical coupling isolation effect between the corresponding optical coupling field effect tube and any of the light-emitting diodes, so as to conduct the path between the control module and the optical coupling module, and generate a control and guidance function generating signal. The CP+ and CP- signals of the control and guidance function generating circuit proposed in the embodiment of the utility model take 0V as the reference point, which is the same as the reference point of the system, and is convenient for direct driving by a microcontroller unit. The control and guidance function generating circuit proposed in the embodiment of the utility model can save the driving level conversion circuit, simplify the circuit to reduce costs, reduce the number of components, and improve reliability. Moreover, the optical coupling module can simultaneously realize the two functions of generating the control and guidance function signal and completely disconnecting the control and guidance function generating circuit, which can achieve a small number of components, a simple circuit, a small size, a low cost, and a high reliability to a large extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the background technology, the drawings required for use in the embodiments of the utility model or the background technology will be described below.

[0032] Figure 1 A circuit block diagram of a control and guidance function generating circuit provided by an embodiment of the utility model;

[0033] Figure 2 A circuit block diagram of a control and guidance function generating circuit provided by an embodiment of the utility model;

[0034] Figure 3 A schematic diagram of a control and guidance function generating circuit provided by an embodiment of the utility model;

[0035] Figure 4 A schematic diagram of the structure of another control and guidance function generating circuit provided by an embodiment of the utility model;

[0036] Figure 5 A schematic diagram of the structure of another control and guidance function generating circuit provided by an embodiment of the utility model;

[0037] Figure 6 A schematic diagram of the structure of another control and guidance function generating circuit provided by an embodiment of the utility model;

[0038] Figure 7 A schematic diagram of the structure of another control and guidance function generating circuit provided by an embodiment of the utility model;

[0039] Figure 8 A schematic diagram of the structure of another control and guidance function generating circuit provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the utility model and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0042] Reference to "embodiments" herein means that a particular feature, result, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same implementation method, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] like Figure 1 As shown, Figure 1 For a circuit diagram of a control and guidance function generating circuit provided by the embodiment of the utility model, please refer to Figure 1, the background technology solution CP pulse width modulation circuit (pulse width modulation, PWM) is composed of a metal-oxide-semiconductor field effect transistor (metal-oxide-semiconductor, MOS) switch circuit and a relay circuit. The MOS switch circuit includes a first control guide function signal source CP+ circuit and a second control guide function signal source CP- circuit. The MOS switch circuit is responsible for generating PWM, and the relay is responsible for completely disconnecting the CP PWM generating circuit when not working. In addition, the relay switch is a mechanical switch, which is opened or closed by electromagnetically driving the mechanical contacts. The number of switching times is limited, and there is a life problem. In addition, the first control guide function signal source CP+ and the second control guide function signal source CP- signals need to use -12V as the reference point instead of 0V as the reference point, which is different from the reference point of the system. It is necessary to control the signals of the first control guide function signal source CP+ and the second control guide function signal source CP- by adding a driving level conversion circuit. In summary, it can be seen that if Figure 1 The control guidance function generating circuit shown is relatively complex, has many electronic components and low reliability. To address the above problems, a control guidance function generating circuit is provided, which eliminates the relay circuit and the driving level conversion circuit, thereby realizing a control guidance function signal generating circuit with a small number of components, a simple circuit, a small size, a low cost and a high reliability.

[0044] Please combine Figure 2 , Figure 2 A circuit block diagram of a control and guidance function generating circuit provided by an embodiment of the utility model, the control and guidance function generating circuit may include: a control module 100, an optical coupling module 200;

[0045] The control module 100 includes a plurality of control submodules, the plurality of control submodules are connected in parallel, and each of the control submodules includes a light emitting diode;

[0046] The optical coupling module 200 includes a plurality of optical coupling sub-modules, the plurality of optical coupling sub-modules are connected in parallel, and each of the optical coupling sub-modules includes an optical coupling field effect transistor;

[0047] Each of the optical coupling sub-modules receives the electrical signal of the control sub-module corresponding to the optical coupling sub-module through the optical coupling isolation effect between the corresponding optical coupling field effect tube and any of the light-emitting diodes, so as to open the path between the control module and the optical coupling module and generate a control guidance function generation signal.

[0048] Specifically, the plurality of control submodules include a first control submodule 110 and a second control submodule 120, and the plurality of optical coupling submodules include a first optical coupling submodule 210 and a second optical coupling submodule 220. The first optical coupling submodule 210 performs its own on-off control by receiving an electrical signal sent by the first control submodule 110, and the second optical coupling submodule 220 performs its own on-off control by receiving an electrical signal sent by the second control submodule 120.

[0049] There are many possible solutions for the circuit in each module, which are not limited here.

[0050] It can be seen that in this embodiment, the driving level conversion circuit can be omitted, the circuit can be simplified to reduce costs, the number of components can be reduced, and reliability can be improved. The optical coupling module can simultaneously realize the two functions of generating a control guidance function signal and completely disconnecting the control guidance function generating circuit, which can greatly achieve a small number of components, a simple circuit, a small size, a low cost, and a high reliability.

[0051] In one possible embodiment, see Figure 3 , Figure 3 A schematic diagram of a control and guidance function generating circuit provided by an embodiment of the utility model is shown below in combination with Figure 3 Each circuit in this embodiment is described in detail. Figure 3 As shown, the multiple control submodules include a first control submodule 110 and a second control submodule 120, wherein the light emitting diode corresponding to the first control submodule 110 is a first light emitting diode L1, and the light emitting diode corresponding to the second control submodule 120 is a second light emitting diode L2.

[0052] The first port of the first light emitting diode L1 is connected to one end of the first power source VDD, and one end of the second light emitting diode L2 is also connected to one end of the first power source VDD.

[0053] Specifically, the first control submodule 110 may include: a first transistor Q1, a first resistor R1, a second resistor R2, a third resistor R3, and the first light-emitting diode L1; the second control submodule 120 includes: a second transistor Q2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and the second light-emitting diode L2; wherein,

[0054] The first port of the first light emitting diode L1 and the first port of the second light emitting diode L2 are both connected to one end of a first power source VDD;

[0055] The second port of the first light emitting diode L1 is connected to the first port of the first resistor R1, the second port of the first resistor R1 is connected to the collector of the first transistor Q1, the base of the first transistor Q1 is connected to the first port of the second resistor R2 and the first port of the third resistor R3, the second port of the third resistor R3 is connected to the ground; the emitter of the first transistor Q1 is connected to the ground;

[0056] The second port of the second light-emitting diode L2 is connected to the first port of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the collector of the second transistor Q2, the base of the second transistor Q2 is connected to the first port of the fifth resistor R5 and the first port of the sixth resistor R6, the second port of the sixth resistor R6 is connected to the ground; the emitter of the second transistor Q2 is connected to the ground.

[0057] Wherein, the first transistor Q1 and the second transistor Q2 may be NPN transistors;

[0058] Specifically, the control module 100 also includes: a first control guidance function signal source CP+ and a second control guidance function signal source CP-, wherein the first control guidance function signal source CP+ is connected to the second port of the second resistor R2, and the second control guidance function signal source CP- is connected to the second port of the fifth resistor R5, and the first control guidance function signal source CP+ and the second control guidance function signal source CP- are used to generate a high level signal or a low level signal.

[0059] Among them, the first control guidance function signal source CP+ can generate a high level or a low level, and the second control guidance function signal source CP- can also generate a high level or a low level. When the first control guidance function signal source CP+ generates a high level, the second control guidance function signal source CP- can generate a high level or a low level. When the first control guidance function signal source CP+ generates a low level, the second control guidance function signal source CP- can generate a high level or a low level.

[0060] For example, when the first control and guidance function signal source CP+ generates a high level, the collector and emitter of the first transistor Q1 are connected, and the current input by the first power supply VDD flows to the ground through the first light-emitting diode L1, the first resistor R1, the collector and emitter of the first transistor Q1, and the first light-emitting diode L1 is turned on and emits light. When the second guidance function signal source CP- generates a high level, the collector and emitter of the second transistor Q2 are connected, and the current input by the first power supply VDD flows to the ground through the second light-emitting diode L2, the second resistor R2, the collector and emitter of the second transistor Q2, and the second light-emitting diode L2 is turned on and emits light. When the first control and guidance function signal source CP+ generates a low level, the collector and emitter of the first transistor Q1 are not connected, and a loop cannot be formed between the first power supply VDD and the ground, and the first light-emitting diode L1, the first resistor R1, and the first transistor Q1 are not connected, and the first light-emitting diode L1 does not emit light. When the second boot function signal source CP- generates a low level, there is no conduction between the collector and the emitter of the second transistor Q2, and a loop cannot be formed between the first power supply VDD and the ground. The second light-emitting diode L2, the second resistor R2, and the second transistor Q2 are all non-conductive, and the second light-emitting diode L2 does not emit light.

[0061] It can be seen that in this embodiment, through the circuit connection method in this embodiment, the optical coupling module can simultaneously realize the two functions of generating a control guidance function signal and completely disconnecting the control guidance function generating circuit, which can achieve a small number of components, a simple circuit, a small size, a low cost and a high reliability to a large extent.

[0062] In one possible embodiment, please refer again to Figure 3 The multiple optical coupling sub-modules include a first optical coupling sub-module 210 and a second optical coupling sub-module 220. The optical coupling field effect transistors corresponding to the first optical coupling sub-module 210 may include: a first optical coupling field effect transistor F1 and a second optical coupling field effect transistor F2. The optical coupling field effect transistors corresponding to the second optical coupling sub-module include: a third optical coupling field effect transistor F3 and a fourth optical coupling field effect transistor F4.

[0063] Specifically, the first optical coupling submodule 210 may include: the first optical coupling field effect transistor F1, the second optical coupling field effect transistor F2, and a seventh resistor R7, and the second optical coupling submodule 220 includes: the third optical coupling field effect transistor F3, the fourth optical coupling field effect transistor F4, and an eighth resistor R8, wherein the drain of the first optical coupling field effect transistor F1 is connected to the port of the second power supply V2, the source of the first optical coupling field effect transistor F1 is connected to the source of the second optical coupling field effect transistor F2, and the gate of the first optical coupling field effect transistor F1 is connected to the gate of the second optical coupling field effect transistor F2;

[0064] The drain of the second optical coupling field effect transistor F2 is connected to the first port of the seventh resistor R7, and the second port of the seventh resistor R7 is connected to the output terminal CP of the control and guidance function generating circuit;

[0065] The drain of the third optical coupling field effect transistor F3 is connected to the first port of the eighth resistor R8, and the second port of the eighth resistor R8 is connected to the output terminal CP of the control and guidance function generating circuit;

[0066] The source of the third optical coupling field effect transistor F3 is connected to the source of the fourth optical coupling field effect transistor F4, the gate of the third optical coupling field effect transistor F3 is connected to the gate of the fourth optical coupling field effect transistor F4, and the drain of the fourth optical coupling field effect transistor F4 is connected to the port of the third power supply V3; the first optical coupling field effect transistor and the second optical coupling field effect transistor are connected to have a bidirectional blocking effect; the third optical coupling field effect transistor and the fourth optical coupling field effect transistor are connected to have a bidirectional blocking effect.

[0067] Among them, the first optical coupling field effect transistor F1 and the second optical coupling field effect transistor F2 are connected in a common gate and common source manner, and the third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 are connected in a common gate and common source manner. Since a parasitic body diode is connected between the drain and source of the first optical coupling field effect transistor F1, the second optical coupling field effect transistor F2, the third optical coupling field effect transistor F3, and the fourth optical coupling field effect transistor F4, even when no gate-source driving voltage is applied, the external signal can still flow through the above body diode, so that the above optical coupling field effect transistor is in a unidirectional blocking state. The purpose of adopting back-to-back connection (that is, common gate and common source connection) is to make the body diodes of the two optical coupling field effect transistors in a bidirectional blocking state when there is no driving signal.

[0068] Among them, the first optical coupling field effect transistor F1, the second optical coupling field effect transistor F2, the third optical coupling field effect transistor F3, and the fourth optical coupling field effect transistor F4 can be P-channel field effect transistors; the first optical coupling field effect transistor F1 and the second optical coupling field effect transistor F2 can form a photosensitive isolation back-to-back field effect transistor; the third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 can form a photosensitive isolation back-to-back field effect transistor; the first optical coupling field effect transistor F1, the second optical coupling field effect transistor F2, the third optical coupling field effect transistor F3, and the fourth optical coupling field effect transistor F4 have parasitic body diodes.

[0069] Specifically, when the first control guidance function signal source CP+ generates the high level signal and the second control guidance function signal source CP- generates the low level signal, the first control submodule is turned on, and the first light-emitting diode L1 generates the electrical signal to turn on the path between the first optical coupling submodule 210 and the first control submodule 110, and the second control submodule 120 is not turned on, the second light-emitting diode L2 is not turned on, and the path between the second optical coupling submodule 220 and the second control submodule 120 is not turned on; the output end CP of the control guidance function generating circuit outputs the first control guidance function generating signal, and the first control guidance function generating signal is used to output the voltage input by the second power supply V2.

[0070] For example, when the first control and guidance function signal source CP+ generates a high-level signal, the collector and emitter of the first transistor Q1 are connected, and the current input from the first power source VDD can flow through the first light-emitting diode L1, the first resistor R1, and the first transistor Q1 to form a closed loop, and the first light-emitting diode L1 can emit light, which leads to the connection between the first optical coupling field effect transistor F1 and the second optical coupling field effect transistor F2 in the first optical coupling submodule 210. Therefore, the current input from the second power source V2 can flow from the drain of the first optical coupling field effect transistor F1 to the source, and then flow through the source of the second optical coupling field effect transistor F2 and the drain of the second optical coupling field effect transistor F2, and reach the output terminal CP of the control and guidance function generating circuit after voltage division by the seventh resistor R7, and then the output terminal CP of the control and guidance function generating circuit outputs the voltage input by the second power source V2. At this time, if the second control and guidance function signal source CP- inputs a low level, a closed loop cannot be formed, the second light-emitting diode L2 cannot be turned on, and the second optical coupling submodule cannot be turned on.

[0071] In one possible embodiment, see Figure 3 When the first control guidance function signal source CP+ generates the low level signal and the second control guidance function signal source CP- inputs the high level signal, the first control submodule 110 is not turned on, the first light-emitting diode L1 is not turned on, the first optical coupling submodule 210 is not turned on, and the second control submodule 120 is turned on, and the second light-emitting diode L2 generates the electrical signal to turn on the path between the second optical coupling submodule 220 and the second control submodule 120; the output terminal CP of the control guidance function generating circuit outputs the second control guidance function generating signal, and the second control guidance function generating signal is used to output the voltage input by the third power supply V3.

[0072] For example, when the second control and guidance function signal source CP- generates a high-level signal, the collector and emitter of the second triode Q2 are connected, and the current input from the first power supply VDD can flow through the second light-emitting diode L2, the second resistor R2, and the second triode Q2 to form a closed loop, and the second light-emitting diode L2 can emit light, which leads to the connection between the third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 in the second optical coupling submodule 220. Therefore, the current input by the third power supply V3 can flow from the drain of the fourth optical coupling field effect transistor F4 to the source, and then flow through the source of the third optical coupling field effect transistor F3 and the drain of the third optical coupling field effect transistor F3, and reach the output end CP of the control and guidance function generating circuit after voltage division by the eighth resistor R8, and then the output end CP of the control and guidance function generating circuit outputs the voltage input by the third power supply V3. At this time, if the first control and guidance function signal source CP+ inputs a low level, a closed loop cannot be formed, the first light-emitting diode L1 cannot be turned on, and the first optical coupling submodule cannot be turned on.

[0073] It can be seen that in this embodiment, through the circuit connection method in this embodiment, the optical coupling module can simultaneously realize the two functions of generating a control guidance function signal and completely disconnecting the control guidance function generating circuit, which can achieve a small number of components, a simple circuit, a small size, a low cost and a high reliability to a large extent.

[0074] In a possible embodiment, when the first control guidance function signal source CP+ generates the low level signal and the second control guidance function signal source CP- inputs the low level signal, the second control submodule 120 is not turned on, and the first control submodule 110 is not turned on, then the second light-emitting diode L2 and the first light-emitting diode L1 are both not turned on and cannot generate the electrical signal, then the second optical coupling submodule 220 and the first optical coupling submodule 210 are both not turned on; the output end of the control guidance function generating circuit is in a high impedance state.

[0075] Among them, when the first control guidance function signal source CP+ and the second control guidance function signal source CP- are both input with the low-level signal, the second control submodule 120 and the first control submodule 110 cannot form a closed loop, and then the first optical coupling field effect transistor F1 and the second optical coupling field effect transistor F2 are not conductive, and the third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 are not conductive, and the output terminal CP of the control guidance function generating circuit cannot output a signal and is in a high impedance state.

[0076] It can be seen that in this embodiment, by controlling the high and low levels of the first control guidance function signal source and the second control guidance function signal source, the output signal of the output end of the control guidance function generating circuit can be controlled, and the optical coupling module can simultaneously realize the two functions of generating the control guidance function signal and completely disconnecting the control guidance function generating circuit, which can greatly reduce the number of components, simplify the circuit, small size, low cost and high reliability.

[0077] In a possible embodiment, when the first control guidance function signal source CP+ generates the high level signal and the second control guidance function signal source CP- inputs the high level signal, the second control submodule 120 and the first control submodule 110 are both turned on, then the second light-emitting diode L2 and the first light-emitting diode L1 both generate the electrical signal to turn on the path between the first optical coupling submodule 210 and the first control submodule 110 and the path between the second optical coupling submodule 220 and the second control submodule 120, then the second optical coupling submodule 220 and the first optical coupling submodule 210 are both turned on; the output end of the control guidance function generating circuit outputs 0V.

[0078] Among them, when the first control and guidance function signal source CP+ generates a high-level signal, the collector and emitter of the first transistor Q1 are connected, and the current input from the first power supply VDD can flow through the first light-emitting diode L1, the first resistor R1, and the first transistor to the ground to form a closed loop. The first light-emitting diode L1 can emit light, which causes the first optical coupling field effect transistor F1 and the second optical coupling field effect transistor F2 in the first optical coupling sub-module 210 to be connected. Therefore, the current input from the second power supply V2 can flow from the drain of the first optical coupling field effect transistor F1 to the source, and then flow through the source of the second optical coupling field effect transistor F2 and the drain of the second optical coupling field effect transistor F2, and reach the output end CP of the control and guidance function generating circuit after voltage division by the seventh resistor R7, and then the output end CP of the control and guidance function generating circuit outputs the voltage input by the second power supply V2. At the same time, when the second control and guidance function signal source CP- generates a high-level signal, the collector and emitter of the second transistor Q2 are connected, and the current input from the first power supply VDD can flow through the second light-emitting diode L2, the second resistor R2, and the second transistor Q2 to the ground to form a closed loop. The second light-emitting diode L2 can emit light, which causes the third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 in the second optical coupling sub-module 220 to be connected. Therefore, the current input from the third power supply V3 can flow from the drain of the fourth optical coupling field effect transistor F4 to the source, and then flow through the source of the third optical coupling field effect transistor F3 and the drain of the third optical coupling field effect transistor F3, and reach the output end CP of the control and guidance function generating circuit after voltage division by the eighth resistor R8, and then the output end CP of the control and guidance function generating circuit outputs the voltage input by the third power supply V3. However, since the voltages at the two ends of the power supply are opposite, the current always flows from the positive pole to the negative pole, so the current can flow from the second power supply V2 to the third power supply V3, and there is a symmetrical structure at both ends of the output terminal CP of the control guidance function generating circuit, and the seventh resistor R7 and the eighth resistor R8 are the same, so 0V is output at the output terminal CP of the control guidance function generating circuit.

[0079] It can be seen that in this embodiment, by controlling the high and low levels of the first control guidance function signal source and the second control guidance function signal source, the output signal of the output end of the control guidance function generating circuit can be controlled, and the optical coupling module can simultaneously realize the two functions of generating the control guidance function signal and completely disconnecting the control guidance function generating circuit, which can greatly reduce the number of components, simplify the circuit, small size, low cost and high reliability.

[0080] In one possible embodiment, see Figure 4 , Figure 4 It is a structural schematic diagram of another control and guidance function generating circuit provided by an embodiment of the utility model. Figure 4 is Figure 3Based on this, Figure 3 On the basis of Figure 4 The control and guidance function generating circuit shown in the figure also includes: a first field effect transistor Q3 and a second field effect transistor Q4. The first field effect transistor Q3 and the second field effect transistor Q4 replace Figure 3 The first transistor Q1 and the second transistor Q2 in the circuit are connected; one end of the first resistor R1 is connected to the first light-emitting diode L1, and the other end is connected to the drain of the first field effect transistor Q3, the source of the first field effect transistor Q3 is connected to the ground, and the gate is connected to one end of the second resistor R2 and one end of the third resistor R3; one end of the fourth resistor R4 is connected to the second light-emitting diode L2, and the other end is connected to the drain of the second field effect transistor Q4, the source of the second field effect transistor Q4 is connected to the ground, and the gate is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, and the rest is connected to Figure 3 The structure of the control and guidance function generating circuit is the same and will not be repeated here.

[0081] Specifically, when the first control guidance function signal source CP+ inputs a high level, the drain and source of the first field effect transistor Q3 are connected, and the current input from the first power supply VDD can flow through the first light-emitting diode L1, the first resistor R1, and the first field effect transistor Q3 to the ground to form a closed loop, and the first light-emitting diode L1 can emit light; if the second control guidance function signal source CP- inputs a low level at this time, a closed loop cannot be formed, and the second light-emitting diode L2 cannot be turned on. When the second control guidance function signal source CP- inputs a high level, the drain and source of the second field effect transistor Q4 are connected, and the current input from the first power supply VDD can flow through the second light-emitting diode L2, the fourth resistor R4, and the second field effect transistor Q4 to the ground to form a closed loop, and the second light-emitting diode L2 can emit light; if the second control guidance function signal source CP- inputs a low level at this time, a closed loop cannot be formed, and the second light-emitting diode L2 cannot be turned on. Other parts are the same Figure 3 The structure of the control and guidance function generating circuit is the same as that of the control and guidance function generating circuit, and will not be repeated here.

[0082] It can be seen that in this embodiment, the first field effect transistor Q3 and the second field effect transistor Q4 can also achieve different effects of on and off conditions under different high and low level conditions. By controlling the high and low levels of the first control guidance function signal source and the second control guidance function signal source, the output signal of the output end of the control guidance function generating circuit can be controlled. The optical coupling module can simultaneously realize the two functions of generating the control guidance function signal and completely disconnecting the control guidance function generating circuit, which can largely achieve a small number of components, a simple circuit, a small size, a low cost, and a high reliability.

[0083] In one possible embodiment, see Figure 5 , Figure 5 It is a structural schematic diagram of another control and guidance function generating circuit provided by an embodiment of the utility model. Figure 5 is Figure 3 Based on this, Figure 3 On the basis of Figure 5 The control and guidance function generating circuit shown in the figure also includes: a first insulated gate bipolar transistor Q5 and a second insulated gate bipolar transistor Q6. The first insulated gate bipolar transistor Q5 replaces Figure 3 The first transistor Q1 in the embodiment is replaced by the second insulated gate bipolar transistor Q6. Figure 3 The second triode Q2 in the. One end of the first resistor R1 is connected to the first light emitting diode L1, and the other end is connected to the drain of the first insulated gate bipolar transistor Q5. The source of the first insulated gate bipolar transistor Q5 is connected to the ground, and the gate is connected to one end of the second resistor R2 and one end of the third resistor R3; one end of the fourth resistor R4 is connected to the second light emitting diode L2, and the other end is connected to the drain of the second insulated gate bipolar transistor Q6. The source of the second insulated gate bipolar transistor Q6 is connected to the ground, and the gate is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6. The rest of the fourth resistor R4 is connected to the second light emitting diode L2. Figure 3 The structure of the control and guidance function generating circuit is the same and will not be repeated here.

[0084] Among them, when the first control guidance function signal source CP+ inputs a high level, the drain and source of the first insulated gate bipolar transistor Q5 are connected, and the current input from the first power supply VDD can flow through the first light-emitting diode L1, the first resistor R1, and the first insulated gate bipolar transistor Q5 to the ground to form a closed loop, and the first light-emitting diode L1 can emit light; if the second control guidance function signal source CP- inputs a low level at this time, a closed loop cannot be formed, and the second light-emitting diode L2 cannot be turned on. When the second control guidance function signal source CP- inputs a high level, the drain and source of the second insulated gate bipolar transistor Q6 are connected, and the current input from the first power supply VDD can flow through the second light-emitting diode L2, the fourth resistor R4, and the second insulated gate bipolar transistor Q6 to the ground to form a closed loop, and the second light-emitting diode L2 can emit light; if the second control guidance function signal source CP- inputs a low level at this time, a closed loop cannot be formed, and the second light-emitting diode L2 cannot be turned on. Other parts are the same Figure 3 The structure of the control and guidance function generating circuit is the same as that of the control and guidance function generating circuit, and will not be repeated here.

[0085] It can be seen that in this embodiment, the first insulated gate bipolar transistor Q5 and the second insulated gate bipolar transistor Q6 can also achieve different on-off effects in different high and low level conditions. By controlling the high and low levels of the first control guidance function signal source and the second control guidance function signal source, the output signal of the output end of the control guidance function generating circuit can be controlled. The optical coupling module can simultaneously realize the two functions of generating the control guidance function signal and completely disconnecting the control guidance function generating circuit, which can greatly achieve a small number of components, a simple circuit, a small size, a low cost, and a high reliability.

[0086] In one possible embodiment, see Figure 6 , Figure 6 It is a structural schematic diagram of another control and guidance function generating circuit provided by an embodiment of the utility model. Figure 6 is Figure 3 Based on this, Figure 3 On the basis of Figure 6 The control and guidance function generating circuit shown in the figure deletes the first transistor Q1, the first resistor R1, the second resistor R2, the third resistor R3, the second transistor Q2, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6. The first control and guidance function signal source CP+ and the second control and guidance function signal source CP- input high level or low level to control the on and off of the first light-emitting diode L1 and the second light-emitting diode L2, thereby achieving the function of controlling the light-emitting diodes.

[0087] Among them, one end of the first light-emitting diode L1 is connected to the first power supply VDD, and the other end of the first light-emitting diode L1 is connected to the first control and guidance function signal source CP+. When the first control and guidance function signal source CP+ inputs a high level, the first light-emitting diode L1 is not turned on. When the first control and guidance function signal source CP+ inputs a low level, the first light-emitting diode L1 is turned on and the first light-emitting diode L1 emits light. One end of the second light-emitting diode L2 is connected to the first power supply VDD, and the other end of the second light-emitting diode L2 is connected to the first control and guidance function signal source CP+. When the first control and guidance function signal source CP+ inputs a high level, the second light-emitting diode L2 is not turned on. When the second control and guidance function signal source CP+ inputs a low level, the second light-emitting diode L2 is turned on and the second light-emitting diode L2 emits light. Other parts are the same Figure 3 The structure of the control and guidance function generating circuit is the same as that of the control and guidance function generating circuit, and will not be repeated here.

[0088] It can be seen that in this embodiment, the high and low levels of the first control and guidance function signal source and the second control and guidance function signal source are directly used to control the on and off of the diode, so that the cost of components can be saved and the circuit is simpler.

[0089] In one possible embodiment, see Figure 7 , Figure 7 It is a structural schematic diagram of another control and guidance function generating circuit provided by an embodiment of the utility model. Figure 7 is Figure 3 Based on this, Figure 3 On the basis of Figure 7 The control and guidance function generating circuit shown in the figure also includes: a first gallium nitride transistor F5 and a second gallium nitride transistor F6. The first gallium nitride transistor F5 replaces Figure 3 The first optical coupling field effect transistor F1, the second optical coupling field effect transistor F2, and the second gallium nitride transistor F6 replace Figure 3 The third optical coupling field effect transistor F3 and the fourth optical coupling field effect transistor F4 in the embodiment. The drain of the first gallium nitride transistor F5 is connected to the second power supply V2, the source of the first gallium nitride transistor F5 is connected to the seventh resistor, the source of the second gallium nitride transistor F6 is connected to the third power supply V3, and the drain of the second gallium nitride transistor F6 is connected to one end of the eighth resistor. Other structures are similar to Figure 3 The structure of the control and guidance function generating circuit is the same as that of the control and guidance function generating circuit, which will not be repeated here.

[0090] The first gallium nitride transistor F5 and the second gallium nitride transistor F6 may also be P-channel field effect transistors.

[0091] The first gallium nitride transistor F5 and the second gallium nitride transistor F6 have a bidirectional blocking effect, that is, the drain-source of the first gallium nitride transistor F5 and the second gallium nitride transistor F6 has no parasitic body diode, and when no gate-source driving voltage is applied, external signals cannot flow into the first gallium nitride transistor F5 and the second gallium nitride transistor F6.

[0092] Among them, when the first control and guidance function signal source CP+ generates a high-level signal, the first light-emitting diode L1 can emit light, and the gate of the first gallium nitride transistor F5 can receive a high-level signal, and the current input by the second power supply V2 can flow from the drain of the first gallium nitride transistor F5 to the source, and the output terminal CP of the control and guidance function generating circuit outputs the voltage input by the second power supply V2. At this time, if the second control and guidance function signal source CP- inputs a low level, the second control submodule cannot form a closed loop, the second light-emitting diode L2 cannot be turned on, and the second gallium nitride transistor F6 cannot be turned on.

[0093] Among them, when the second control and guidance function signal source CP- generates a high-level signal, the second light-emitting diode L2 can emit light, and the gate of the second gallium nitride transistor F6 receives a high-level signal, and the current input by the third power supply V3 can flow from the drain of the second gallium nitride transistor F6 to the source, and the output terminal CP of the control and guidance function generating circuit outputs the voltage input by the third power supply V3. At this time, if the first control and guidance function signal source CP- inputs a low level, the first control submodule cannot form a closed loop, the first light-emitting diode L1 cannot be turned on, and the first gallium nitride transistor F5 cannot be turned on.

[0094] Among them, when the first control and guidance function signal source CP+ and the second control and guidance function signal source CP- are both input with the low-level signal, the second light-emitting diode L2 and the first light-emitting diode L1 are not turned on, and the electrical signal cannot be generated, and then the first gallium nitride transistor F5 and the second gallium nitride transistor F6 are not turned on, and the output terminal CP of the control and guidance function generating circuit cannot output a signal and is in a high impedance state.

[0095] Among them, when the first control and guidance function signal source CP+ generates a high-level signal, the first light-emitting diode L1 can emit light, and the current input by the second power supply V2 can flow from the drain to the source of the first gallium nitride transistor F5, and reach the output end CP of the control and guidance function generating circuit after voltage division by the seventh resistor R7, and then the output end CP of the control and guidance function generating circuit outputs the voltage input by the second power supply V2. At the same time, when the second control and guidance function signal source CP- generates a high-level signal, the second light-emitting diode L2 can emit light, and the current input by the third power supply V3 can flow from the drain to the source of the second gallium nitride transistor F6, and reach the output end CP of the control and guidance function generating circuit after voltage division by the eighth resistor R8, and then the output end CP of the control and guidance function generating circuit outputs the voltage input by the other end of the third power supply V3. However, since the voltages at the two ends of the power supply are opposite and the current always flows from the positive pole to the negative pole, the current can flow from the second power supply V2 to the third power supply V3, and there is a symmetrical structure at both ends of the output terminal CP of the control guidance function generating circuit, and the seventh resistor R7 and the eighth resistor R8 are the same, so 0V is output at the output terminal CP of the control guidance function generating circuit.

[0096] It can be seen that in this embodiment, by using the first gallium nitride transistor F5 and the second gallium nitride transistor F6, one gallium nitride transistor can replace a group of back-to-back transistors, which can make the circuit simpler and save costs.

[0097] In one possible embodiment, see Figure 8 , Figure 8 It is a structural schematic diagram of another control and guidance function generating circuit provided by an embodiment of the utility model. Figure 8 is Figure 3 Based on this, Figure 3 On the basis of Figure 8 The control and guidance function generating circuit shown in the figure connects the seventh resistor R7 to one end of the power supply, and the other end of the seventh resistor R7 is connected to the first optical coupling field effect transistor F1, and connects the eighth resistor R8 to the other end of the power supply, and the other end of the eighth resistor R8 is connected to the fourth optical coupling field effect transistor F4. The other structures are the same as Figure 3 The structures are the same and will not be described in detail here.

[0098] It can be seen that in this embodiment, the driving level conversion circuit can be omitted, the circuit can be simplified to reduce costs, the number of components can be reduced, and the reliability can be improved. The optical coupling module can simultaneously realize the two functions of generating a control guidance function signal and completely disconnecting the control guidance function generation circuit, which can achieve a small number of components, a simple circuit, a small volume, a low cost, and high reliability to a large extent. It should be noted that for the aforementioned various utility model implementations, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described order of actions, because according to the utility model, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the implementations described in the specification are all optional implementations, and the actions and modules involved are not necessarily required by the utility model.

[0099] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] In the several embodiments provided by the present utility model, it should be understood that the disclosed device can be implemented in other ways. For example, the device implementation described above is only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0101] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software program modules.

[0102] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the utility model can be essentially or in other words, the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the utility model. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0103] A person skilled in the art may understand that all or part of the steps in the various methods of the above-mentioned embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable memory, and the memory may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0104] The above is a detailed introduction to the implementation mode of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above implementation mode is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A control and guidance function generating circuit, characterized in that: include: A control module, comprising a plurality of control submodules, wherein the plurality of control submodules are connected in parallel, and each of the control submodules comprises a light emitting diode; An optical coupling module, comprising a plurality of optical coupling sub-modules, wherein the plurality of optical coupling sub-modules are connected in parallel, and each of the optical coupling sub-modules comprises an optical coupling field effect transistor; Each of the optical coupling sub-modules receives the electrical signal of the control sub-module corresponding to the optical coupling sub-module through the optical coupling isolation effect between the corresponding optical coupling field effect tube and any of the light-emitting diodes, so as to open the path between the control module and the optical coupling module and generate a control guidance function generation signal.

2. The control and guidance function generating circuit according to claim 1, characterized in that: The multiple control submodules include a first control submodule and a second control submodule, wherein the light emitting diode corresponding to the first control submodule is a first light emitting diode, and the light emitting diode corresponding to the second control submodule is a second light emitting diode.

3. The control and guidance function generating circuit according to claim 2, characterized in that: The first control submodule includes: a first triode, a first resistor, a second resistor, a third resistor, and the first light-emitting diode; the second control submodule includes: a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and the second light-emitting diode; wherein, The first port of the first light emitting diode and the first port of the second light emitting diode are both connected to one end of a first power source; The second port of the first light emitting diode is connected to the first port of the first resistor, the second port of the first resistor is connected to the collector of the first transistor, the base of the first transistor is connected to the first port of the second resistor and the first port of the third resistor, the second port of the third resistor is connected to the ground; the emitter of the first transistor is connected to the ground; The second port of the second light-emitting diode is connected to the first port of the fourth resistor, the other end of the fourth resistor is connected to the collector of the second transistor, the base of the second transistor is connected to the first port of the fifth resistor and the first port of the sixth resistor, the second port of the sixth resistor is connected to the ground; the emitter of the second transistor is connected to the ground.

4. The control and guidance function generating circuit according to claim 3, characterized in that: The control module also includes: a first control guidance function signal source and a second control guidance function signal source, wherein the first control guidance function signal source is connected to the second port of the second resistor, and the second control guidance function signal source is connected to the second port of the fifth resistor, and the first control guidance function signal source and the second control guidance function signal source are used to generate a high level signal or a low level signal.

5. The control and guidance function generating circuit according to claim 4, characterized in that: The multiple optical coupling sub-modules include a first optical coupling sub-module and a second optical coupling sub-module. The optical coupling field effect transistors corresponding to the first optical coupling sub-module include: a first optical coupling field effect transistor and a second optical coupling field effect transistor. The optical coupling field effect transistors corresponding to the second optical coupling sub-module include: a third optical coupling field effect transistor and a fourth optical coupling field effect transistor.

6. The control and guidance function generating circuit according to claim 5, characterized in that: The first optical coupling submodule includes: the first optical coupling field effect transistor, the second optical coupling field effect transistor, and a seventh resistor; the second optical coupling submodule includes: the third optical coupling field effect transistor, the fourth optical coupling field effect transistor, and an eighth resistor, wherein: The drain of the first optical coupling field effect transistor is connected to the port of the second power supply, the source of the first optical coupling field effect transistor is connected to the source of the second optical coupling field effect transistor, and the gate of the first optical coupling field effect transistor is connected to the gate of the second optical coupling field effect transistor; The drain of the second optical coupling field effect transistor is connected to the first port of the seventh resistor, and the second port of the seventh resistor is connected to the output end of the control and guidance function generating circuit; The drain of the third optical coupling field effect transistor is connected to the first port of the eighth resistor, and the second port of the eighth resistor is connected to the output end of the control and guidance function generating circuit; The source of the third optical coupling field effect transistor is connected to the source of the fourth optical coupling field effect transistor, the gate of the third optical coupling field effect transistor is connected to the gate of the fourth optical coupling field effect transistor, and the drain of the fourth optical coupling field effect transistor is connected to the port of the third power supply; The first optical coupling field effect transistor and the second optical coupling field effect transistor are connected to have a bidirectional isolation function; the third optical coupling field effect transistor and the fourth optical coupling field effect transistor are connected to have a bidirectional blocking function.

7. The control and guidance function generating circuit according to claim 6, characterized in that: When the first control and guidance function signal source generates the high level signal and the second control and guidance function signal source generates the low level signal, the first control submodule is turned on and the first light emitting diode generates the electrical signal to conduct the path between the first optical coupling submodule and the first control submodule, and when the second control submodule is not turned on and the second light emitting diode is not turned on, the path between the second optical coupling submodule and the second control submodule is not conducted; The output end of the control and guidance function generating circuit outputs a first control and guidance function generating signal, and the first control and guidance function generating signal is used to output the voltage input by the second power supply.

8. The control and guidance function generating circuit according to claim 6, characterized in that: When the first control and guidance function signal source generates the low-level signal and the second control and guidance function signal source inputs the high-level signal, the first control submodule is not turned on, the first light-emitting diode is not turned on, the first optical coupling submodule is not turned on, and the second control submodule is turned on, and the second light-emitting diode generates the electrical signal to turn on the path between the second optical coupling submodule and the second control submodule; The output end of the control and guidance function generating circuit outputs a second control and guidance function generating signal, and the second control and guidance function generating signal is used to output the voltage input by the third power supply.

9. The control and guidance function generating circuit according to claim 6, characterized in that: When the first control and guidance function signal source generates the low level signal and the second control and guidance function signal source inputs the low level signal, the second control submodule is not turned on, and when the first control submodule is not turned on, the second light emitting diode and the first light emitting diode are not turned on, and the electrical signal cannot be generated, then the second optical coupling submodule and the first optical coupling submodule are not turned on; The output end of the control and guidance function generating circuit is in a high impedance state.

10. The control and guidance function generating circuit according to claim 6, characterized in that: When the first control and guidance function signal source generates the high level signal and the second control and guidance function signal source inputs the high level signal, the second control submodule and the first control submodule are both turned on, then the second light emitting diode and the first light emitting diode both generate the electrical signal to conduct the path between the first optical coupling submodule and the first control submodule and the path between the second optical coupling submodule and the second control submodule, then the second optical coupling submodule and the first optical coupling submodule are both turned on; The output end of the control and guidance function generating circuit outputs 0V.

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