Isolation coupling device driven by two ports

Abstract

A kind of two-port driven isolation coupling device, including first buffer amplifier, isolation coupler and second buffer amplifier, the isolation coupler includes isolation coupling transmitting unit and isolation coupling receiving unit, the isolation coupling transmitting unit is electrically connected to the first buffer amplifier and the second buffer amplifier.The first buffer amplifier is configured to be controlled by first control signal to output first voltage to one end of the isolation coupling transmitting unit;The second buffer amplifier is configured to be controlled by second control signal to output second voltage to the other end of the isolation coupling transmitting unit;The isolation coupling transmitting unit is configured to be driven by the first voltage and the second voltage to be isolated to the isolation coupling receiving unit.

Description

Technical Field

[0001] This application relates to an isolation coupling device, and more particularly to a dual-port driven isolation coupling device. Background Technology

[0002] Regarding the driving of the transmitter of an isolation coupler, such as the driving of the LED in an optocoupler, a current-limiting resistor is typically connected in series with the logic output port of a pulse width modulation (PWM) signal controller to the LED, which is then connected to one end of the power supply. If the logic signal output by the logic output port causes the LED to be forward biased, the LED will emit light; conversely, if the logic signal output by the logic output port does not cause the LED to be forward biased, the LED will not emit light.

[0003] In the application of optocouplers, related optocouplers can connect a resistor in series at each end of the light-emitting diode to improve the common mode transient immunity (CMTI) capability. Although the two resistors seem symmetrical, one side is actually connected to the logic output port and the other side is connected to the power supply voltage. The characteristics of the two are mismatched, so the transient current will still interfere with the brightness of the light-emitting diode. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this application is to provide a dual-port driven isolation coupling device.

[0005] To address the aforementioned problems, another objective of this application is to provide a dual-port driven isolation coupling device.

[0006] To achieve the aforementioned objectives of this application, the dual-port driven isolation coupling device of this application includes: a first buffer amplifier; an isolation coupler including an isolation coupling transmitting unit and an isolation coupling receiving unit, the isolation coupling transmitting unit being electrically connected to the first buffer amplifier; and a second buffer amplifier being electrically connected to the isolation coupling transmitting unit, wherein the first buffer amplifier is configured to be controlled by a first control signal to output a first voltage to one end of the isolation coupling transmitting unit; the second buffer amplifier is configured to be controlled by a second control signal to output a second voltage to the other end of the isolation coupling transmitting unit; and the isolation coupling transmitting unit is configured to be driven by the first voltage and the second voltage to isolate coupling to the isolation coupling receiving unit.

[0007] In one embodiment, the first output voltage value of the first voltage is equal to a first fixed multiple of the first input voltage value of the first control signal; the second output voltage value of the second voltage is equal to a second fixed multiple of the second input voltage value of the second control signal.

[0008] In one embodiment, the isolated coupling emitting unit is a light-emitting diode, the isolated coupling receiving unit is a photodiode, and the light-emitting diode is configured to be driven by the first voltage and the second voltage to control the luminous brightness of the light-emitting diode.

[0009] In one embodiment, the system further includes a control waveform generator electrically connected to the first buffer amplifier and the second buffer amplifier, wherein the control waveform generator is configured to control the first control signal to a first high voltage level or a first low voltage level, or the control waveform generator is configured to control the second control signal to a second high voltage level or a second low voltage level.

[0010] In one embodiment, the isolation coupler is a capacitive isolation capacitor circuit or a magnetically coupled isolation transformer circuit.

[0011] To achieve yet another objective of this application, the dual-port driven isolation coupling device of this application includes: a first buffer amplifier; an isolation coupler including an isolation coupling transmitting unit and an isolation coupling receiving unit, the isolation coupling transmitting unit being electrically connected to the first buffer amplifier; a physical resistor being electrically connected to the isolation coupling transmitting unit, the impedance of the physical resistor being equal to the equivalent output impedance of the first buffer amplifier; and a voltage source being electrically connected to the physical resistor, wherein the first buffer amplifier is configured to be controlled by a first control signal to output a first voltage to one end of the isolation coupling transmitting unit; the voltage source is configured to transmit a second control signal to the physical resistor; the physical resistor is configured to receive the second control signal to output a second voltage to the other end of the isolation coupling transmitting unit; and the isolation coupling transmitting unit is configured to be driven by the first voltage and the second voltage to isolate coupling to the isolation coupling receiving unit.

[0012] In one embodiment, the first output voltage value of the first voltage is equal to a first fixed multiple of the first input voltage value of the first control signal.

[0013] In one embodiment, the isolated coupling emitting unit is a light-emitting diode, the isolated coupling receiving unit is a photodiode, and the light-emitting diode is configured to be driven by the first voltage and the second voltage to control the luminous brightness of the light-emitting diode.

[0014] In one embodiment, the system further includes: a control waveform generator electrically connected to the first buffer amplifier, wherein the control waveform generator is configured to control the first control signal to a first high voltage level or a first low voltage level; the first high voltage level is higher than the first low voltage level, and the first low voltage level is higher than the second voltage; when the first control signal is at the first high voltage level, the luminous intensity of the light-emitting diode is a first intensity; when the first control signal is at the first low voltage level, the luminous intensity of the light-emitting diode is a second intensity; and the first intensity is stronger than the second intensity.

[0015] In one embodiment, the isolation coupler is a capacitive isolation capacitor circuit or a magnetically coupled isolation transformer circuit.

[0016] The benefit of this application is to reduce the interference of transient current on the isolation coupler.

[0017] To further understand the technology, methods, and effects of this application and to achieve the intended purpose of this application, please refer to the following detailed description and accompanying drawings; furthermore, the purpose, characteristics, and features of this application can be understood more deeply and specifically; however, the accompanying drawings are provided for reference and description only and are not intended to limit the scope of this application. Attached Figure Description

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0019] Figure 1 This is a circuit block diagram of a first example of the dual-port driven isolated coupling device of this application.

[0020] Figure 2 This is a first signal state waveform diagram of a first example of the dual-port driven isolated coupling device of this application.

[0021] Figure 3 For the purposes of this application Figure 2 Waveform of the transvoltage of the light-emitting diode.

[0022] Figure 4 This is a second signal state waveform diagram for a first example of the dual-port driven isolated coupling device of this application.

[0023] Figure 5 For the purposes of this application Figure 4 Waveform of the transvoltage of the light-emitting diode.

[0024] Figure 6This is a schematic diagram illustrating the suppression of interference caused by common-mode transient current in this application.

[0025] Figure 7 This is a circuit block diagram of a second example of the dual-port driven isolated coupling device of this application.

[0026] Figure 8 This is a signal status waveform diagram of a second example of the dual-port driven isolated coupling device of this application.

[0027] Figure 9 This is a partial detailed circuit diagram of one embodiment of the dual-port driven isolated coupling device of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10: Dual-port driven isolation coupling device;

[0030] 102: First buffer amplifier;

[0031] 104: Isolation Coupler;

[0032] 106: Second buffer amplifier;

[0033] 108: Switch controller;

[0034] 110: Physical resistance;

[0035] 112: Voltage source;

[0036] 114: Output terminal;

[0037] 116: Common-mode transient pulse generator;

[0038] 118: Inverter;

[0039] 120: Buffer amplifier;

[0040] 122: Comparator;

[0041] 124: Differential amplifier;

[0042] 126: Control waveform generator;

[0043] 1021: Equivalent output impedance;

[0044] 1022: Ideal buffer amplifier;

[0045] 1041: Isolated Coupled Transmitter Unit;

[0046] 1042: Isolated coupling receiving unit;

[0047] C: Capacitor;

[0048] CA: First parasitic capacitance;

[0049] CK: Second parasitic capacitance;

[0050] HR: Voltage margin;

[0051] I1: First current source;

[0052] I2: Second current source;

[0053] JW: Jumper wire;

[0054] R: Resistance;

[0055] RC: Resistor-capacitor circuit;

[0056] SW1: First voltage level switch;

[0057] SW2: Second voltage level switch;

[0058] T: Transistor;

[0059] VA: First voltage;

[0060] VA1: First high voltage level;

[0061] VA2: First low voltage level;

[0062] Vbright: First brightness voltage;

[0063] Vdd: Operating voltage;

[0064] Vdim: Second brightness voltage;

[0065] VF: Forward voltage;

[0066] VinA: First control signal;

[0067] VinK: Second control signal;

[0068] VK: Second voltage;

[0069] VK1: Second low voltage level;

[0070] VK2: Second high voltage level;

[0071] Vmid: Intermediate voltage;

[0072] VR: Reverse voltage;

[0073] VREF: Reference voltage;

[0074] Vss: Grounding voltage. Detailed Implementation

[0075] Numerous specific details are provided in this application to provide a comprehensive understanding of the embodiments thereof; however, those skilled in the art will understand that this application may be practiced without one or more of these specific details; in other instances, well-known details have not been shown or described to avoid obscuring the features of this application. The technical content and detailed description of this application are as follows, and are illustrated with accompanying drawings.

[0076] Please refer to Figure 1 This is a circuit block diagram of a first example of the dual-port driven isolation coupling device 10 of this application. The dual-port driven isolation coupling device 10 of this application includes a first buffer amplifier 102, an isolation coupler 104, a second buffer amplifier 106, and a control waveform generator 126. The control waveform generator 126 includes a first voltage level switcher SW1, a second voltage level switcher SW2, and a switching controller 108. The isolation coupler 104 includes an isolation coupling transmitting unit 1041 and an isolation coupling receiving unit 1042. Figure 1 It also displays output terminal 114.

[0077] The first buffer amplifier 102 and the second buffer amplifier 106 are a pair of voltage-output buffer amplifiers with matched characteristics (e.g., push-pull amplifiers). The input terminal of the buffer amplifier receives a control signal, and its output voltage is approximately the same as (or at a fixed multiple) the input control signal. Its main function is to enhance the driving capability of the output. The voltage-output amplifier has bidirectional current driving capability (that is, the output terminal can output current or input current, which is called bidirectional output current). In order to maintain its proper output voltage, the output terminal can source current (i.e., positive current) or sink current (i.e., negative current).

[0078] The output of a voltage output amplifier is voltage, and the output stage is capable of driving positive and negative current. The output stage must remain active and not be clamped by the power supply when dealing with surges. Therefore, the operating voltage minus the ground voltage will be greater than the forward voltage of the light-emitting diode (usually 1 to 2 volts) plus the head room of the operating voltage and ground voltage (usually greater than or equal to 1 volt). The operating voltage minus the ground voltage is usually between 2.8 volts and 5 volts.

[0079] The isolated coupling transmitter unit 1041 is electrically connected to the first buffer amplifier 102 and the second buffer amplifier 106. The first voltage level switch SW1 is electrically connected to the first buffer amplifier 102 and the switching controller 108. The second voltage level switch SW2 is electrically connected to the second buffer amplifier 106 and the switching controller 108. The control waveform generator 126 is electrically connected to the first buffer amplifier 102 and the second buffer amplifier 106.

[0080] The first buffer amplifier 102 is configured to be controlled by a first control signal VinA to output a first voltage VA to one end of the isolated coupling transmitting unit 1041; the second buffer amplifier 106 is configured to be controlled by a second control signal VinK to output a second voltage VK to the other end of the isolated coupling transmitting unit 1041; the isolated coupling transmitting unit 1041 is configured to be driven by the first voltage VA and the second voltage VK to be isolated coupled to the isolated coupling receiving unit 1042. The first output voltage value of the first voltage VA is equal to a first fixed multiple of the first input voltage value of the first control signal VinA; the second output voltage value of the second voltage VK is equal to a second fixed multiple of the second input voltage value of the second control signal VinK.

[0081] The isolated coupling emitting unit 1041 is a light-emitting diode (LED), and the isolated coupling receiving unit 1042 is a photodiode. The LED is configured to be driven by the first voltage VA and the second voltage VK to control its luminous brightness. The control waveform generation circuit is usually also placed on the same chip as the first buffer amplifier 102. Therefore, the system-in-package (SIP) of this application contains three chips: all the driving circuitry, including the circuitry for receiving signals and forming waveforms, and the first buffer amplifier 102, are placed on the first chip; all the receiving circuitry, including the isolated coupling receiving unit 1042, is placed on the second chip; and the isolated coupling emitting unit 1041 is the third chip.

[0082] The control waveform generator 126 is configured to control the first control signal VinA to a first high voltage level VA1 or a first low voltage level VA2, or the control waveform generator 126 is configured to control the second control signal VinK to a second high voltage level VK2 or a second low voltage level VK1. In other words, the switching controller 108 is configured to switch the first voltage level switch SW1 such that the first control signal VinA is the first high voltage level VA1 or the first low voltage level VA2; the switching controller 108 is configured to switch the second voltage level switch SW2 such that the second control signal VinK is the second high voltage level VK2 or the second low voltage level VK1. The control waveform generator 126 can also be configured to control the first control signal VinA to the first high voltage level VA1 or the first low voltage level VA2, and at the same time, the control waveform generator 126 can be configured to control the second control signal VinK to the second high voltage level VK2 or the second low voltage level VK1.

[0083] Please refer to Figure 2 This is a first signal state waveform diagram of a first example of the dual-port driven isolation coupling device 10 of this application; please also refer to... Figure 3 This is in relation to the present application. Figure 2 The waveform diagram of the voltage across the light-emitting diode is shown, where the voltage across the light-emitting diode is the first voltage VA minus the second voltage VK; please also refer to... Figure 1 The first high voltage level VA1 is higher than the first low voltage level VA2, the first low voltage level VA2 is higher than the second high voltage level VK2, and the second high voltage level VK2 is higher than the second low voltage level VK1.

[0084] When the first control signal VinA is at the first high voltage level VA1 and the second control signal VinK is at the second low voltage level VK1, the luminous brightness of the light-emitting diode is the first brightness; when the first control signal VinA is at the first low voltage level VA2 and the second control signal VinK is at the second high voltage level VK2, the luminous brightness of the light-emitting diode is the second brightness; the first brightness is stronger than the second brightness.

[0085] The above Figure 2In constant-brightness mode, the LED maintains a forward bias voltage, using a stronger first brightness and a weaker second brightness to represent information. The LED's driving voltage can be a first brightness voltage Vbright and a second brightness voltage Vdim; the first brightness voltage Vbright is higher than the second brightness voltage Vdim, and the current corresponding to the first brightness voltage Vbright is also greater than the current corresponding to the second brightness voltage Vdim. Therefore, the brightness of the LED corresponding to the first brightness voltage Vbright is stronger than the brightness corresponding to the second brightness voltage Vdim. Furthermore, more driving voltages can produce other different brightness levels. Maintaining the LED in a forward bias voltage helps avoid the low bias voltage range where the LED's junction capacitance is large, thus accelerating the LED's driving.

[0086] exist Figure 2 The relationship between the waveform and the power supply voltage is as follows: the first voltage VA and the second voltage VK are designed to be roughly in the middle of the power supply voltage; the middle voltage Vmid = (the first voltage VA + the second voltage VK) / 2 = (the working voltage Vdd + the ground voltage Vss) / 2; there is a voltage margin HR between the first voltage VA and the working voltage Vdd, and there is also a voltage margin HR between the second voltage VK and the ground voltage Vss.

[0087] Please refer to Figure 4 This is a second signal state waveform diagram of a first example of the dual-port driven isolation coupling device 10 of this application; please also refer to... Figure 5 This is in relation to the present application. Figure 4 The waveform of the transvoltage of the light-emitting diode; and please also refer to the following: Figure 1 The first high voltage level VA1 is higher than the second high voltage level VK2, the second high voltage level VK2 is higher than the first low voltage level VA2, and the first low voltage level VA2 is higher than the second low voltage level VK1.

[0088] When the first control signal VinA is at the first high voltage level VA1 and the second control signal VinK is at the second low voltage level VK1, the light-emitting diode is configured to be driven to emit light; when the first control signal VinA is at the first low voltage level VA2 and the second control signal VinK is at the second high voltage level VK2, the light-emitting diode is configured to be stopped from being driven.

[0089] The above Figure 4This is a forced mode, meaning that when the LED is turned off, a reverse voltage is applied to accelerate the LED's shutdown speed. A forward voltage VF or a reverse voltage VR can be applied to the LED; the forward voltage VF corresponds to the LED's current, so the LED lights up; the reverse voltage VR does not correspond to the LED's current, so the LED does not light up. Furthermore, more forward voltages VF can produce different brightness levels. Reverse bias can accelerate the LED's transition to a non-conducting state, increasing the LED's driving speed, and the dual-port drive of this application achieves this advantage of reverse bias.

[0090] The anode and cathode of the light-emitting diode are respectively connected to the output of a buffer amplifier with identical characteristics, which helps to offset the effects of common-mode transients. The voltage output characteristics of the buffer amplifier are better able to withstand the inflow and outflow of transient-coupled currents, further enhancing transient suppression and improving the ability to suppress common-mode transient immunity (CMTI). The dual outputs of this application allow for a more flexible and variable drive voltage waveform.

[0091] Please refer to Figure 6 This is a schematic diagram illustrating the suppression of interference caused by common-mode transient current in this application, where the dashed line represents the common-mode transient coupling path. The characteristics of the buffer amplifier are matched to the characteristics of the first parasitic capacitance CA and the second parasitic capacitance CK, ensuring that both ends of the light-emitting diode are subjected to the same transient surge; the trans-voltage of the light-emitting diode itself remains unchanged, and the current of the light-emitting diode remains unchanged. Because the buffer amplifier is a voltage output, its output stage can suppress voltage surges caused by transient current, further relaxing the requirement for symmetry matching between the buffer amplifier and the first parasitic capacitance CA and the second parasitic capacitance CK.

[0092] The surge discussed in this case mainly concerns the voltage change across the coupling element. The voltage output characteristic is to control the voltage, thereby suppressing voltage changes caused by external interference. Characteristic matching can be optimized based on the ratio of the first parasitic capacitance CA and the second parasitic capacitance CK (similar to the resistance values ​​of the two resistors in the aforementioned related technology optocoupler); of course, the actual values ​​of the first parasitic capacitance CA and the second parasitic capacitance CK (and process stability) are closely related to the packaging architecture. Figure 6 It also displays the common-mode transient pulse generator 116 and the ground voltage Vss. Common-mode transient current refers to the instantaneous voltage change of (parasitic) capacitance caused by the instantaneous change in the relative voltage of the system, i.e., the generation of capacitive current. Transient current can only be released and discharged, and cannot be blocked (because it will generate high voltage).

[0093] Please refer to Figure 7This is a circuit block diagram of a second example of the dual-port driven isolated coupling device 10 of this application. The dual-port driven isolated coupling device 10 of this application includes a first buffer amplifier 102, an isolated coupler 104, a physical resistor 110, a voltage source 112, and a control waveform generator 126. The control waveform generator 126 includes a first voltage level switch SW1 and a switching controller 108. The isolated coupler 104 includes an isolated coupling transmitting unit 1041 and an isolated coupling receiving unit 1042. The first buffer amplifier 102 includes an ideal buffer amplifier 1022 and an equivalent output impedance 1021. Generally, a logic output high can only source current, while a logic output low can only sink current. However, the characteristic of a power supply is that it can maintain voltage and can source or sink current depending on the load.

[0094] The equivalent output impedance 1021 can be, for example, less than 10 ohms; the physical resistor 110 (for example, less than 30 ohms; however, the sum of the two resistors in the aforementioned related technology optocoupler will be greater than or equal to 300 ohms) can also be implemented using trace impedance, and is used to match the equivalent output impedance 1021 rather than to limit current; the current is mainly determined by the driving voltage of the light-emitting diode. The voltage source 112 has the characteristic of voltage output, which maintains the appropriate (design or control determined) output voltage, and the output terminal can source current or sink current, depending on the external load condition. Figure 7 It also shows output terminal 114, and the power supply used (i.e., the operating voltage minus the ground voltage) is, for example, greater than or equal to 2.8 volts.

[0095] The isolated coupling transmitter unit 1041 is electrically connected to the first buffer amplifier 102 and the physical resistor 110. The first voltage level switch SW1 is electrically connected to the first buffer amplifier 102 and the switching controller 108. The voltage source 112 is electrically connected to the physical resistor 110. The impedance of the physical resistor 110 is equal to the equivalent output impedance 1021 of the first buffer amplifier 102. The control waveform generator 126 is electrically connected to the first buffer amplifier 102.

[0096] The first buffer amplifier 102 is configured to be controlled by a first control signal VinA to output a first voltage VA to one end of the isolated coupling transmitting unit 1041; the voltage source 112 is configured to transmit a second control signal VinK to the physical resistor 110; the physical resistor 110 is configured to receive the second control signal VinK to output a second voltage VK to the other end of the isolated coupling transmitting unit 1041, wherein the second voltage VK is a constant voltage; the isolated coupling transmitting unit 1041 is configured to be driven by the first voltage VA and the second voltage VK to be isolated coupled to the isolated coupling receiving unit 1042. The first output voltage value of the first voltage VA is equal to a first fixed multiple of the first input voltage value of the first control signal VinA.

[0097] The isolated coupling transmitting unit 1041 is a light-emitting diode (LED), and the isolated coupling receiving unit 1042 is a photodiode. The LED is configured to be driven by the first voltage VA and the second voltage VK to control its brightness. The control waveform generator 126 is configured to control the first control signal VinA to either a first high voltage level VA1 or a first low voltage level VA2. In other words, the switching controller 108 is configured to switch the first voltage level switch SW1 so that the first control signal VinA is either the first high voltage level VA1 or the first low voltage level VA2.

[0098] Please refer to Figure 8 This is a signal state waveform diagram of a second example of the dual-port driven isolation coupling device 10 of this application; please also refer to... Figure 7 The first high voltage level VA1 is higher than the first low voltage level VA2, and the first low voltage level VA2 is higher than the second voltage VK. When the first control signal VinA is the first high voltage level VA1, the luminous intensity of the light-emitting diode is a first intensity; when the first control signal VinA is the first low voltage level VA2, the luminous intensity of the light-emitting diode is a second intensity; the first intensity is stronger than the second intensity.

[0099] The dual-port LED driver of this application can receive, for example, a command signal from a pulse width modulation signal controller, thereby controlling the voltage across the LED to achieve the effect of modulating the current (brightness) of the LED; in addition, it can suppress transient current coupled from the LED, so that the voltage across the LED remains constant, thereby achieving the effect of the LED current (brightness) being unaffected by transient interference.

[0100] Furthermore, please refer to Figure 9This is a partial detailed circuit diagram of an embodiment of the dual-port driven isolation coupling device 10 of this application. The dual-port driven isolation coupling device 10 also includes a plurality of first current sources I1, a plurality of second current sources I2, a plurality of resistor-capacitor sub-circuits RC, and a plurality of transistors T, all of which are electrically connected to each other. The first current source I1 can be adjusted by monitoring the current of the light-emitting diode, and the second current source I2 can be controlled to, for example, 90% of the current of the first current source I1.

[0101] The advantage of this application lies in reducing the interference of transient currents on the isolation coupler. The dual-port drive control of this application is highly flexible, and to cope with transient currents, the aforementioned buffer amplifier of this application possesses high-speed (wideband) response characteristics. The overall system experiences voltage transients, but the reason why the above content of this application focuses on transient currents is that, in most isolated environments, the result of isolation will only be that coupling (parasitic) capacitance cannot be completely eliminated. The rate of change of voltage transients crossing the coupling (parasitic) capacitance results in the generation of transient currents; therefore, the above content of this application focuses on transient currents.

[0102] Although this application has been described with reference to embodiments thereof, it should be understood that this application is not limited to its details; various substitutions and modifications have been proposed in the foregoing description, and other substitutions and modifications will be apparent to those skilled in the art; therefore, all such substitutions and modifications are intended to be included within the scope of this application.

Claims

1. A dual-port driven isolation coupling device, comprising: First buffer amplifier; An isolation coupler, comprising an isolation coupling transmitter unit and an isolation coupling receiver unit, wherein the isolation coupling transmitter unit is electrically connected to the first buffer amplifier; and A second buffer amplifier is electrically connected to the isolated coupling transmitting unit, wherein the first buffer amplifier is configured to be controlled by a first control signal to output a first voltage to one end of the isolated coupling transmitting unit; the second buffer amplifier is configured to be controlled by a second control signal to output a second voltage to the other end of the isolated coupling transmitting unit; and the isolated coupling transmitting unit is configured to be driven by the first voltage and the second voltage to be isolated coupled to the isolated coupling receiving unit.

2. The dual-port driven isolation coupling device according to claim 1, wherein, The first output voltage value of the first voltage is equal to a first fixed multiple of the first input voltage value of the first control signal; the second output voltage value of the second voltage is equal to a second fixed multiple of the second input voltage value of the second control signal.

3. The dual-port driven isolation coupling device according to claim 1, wherein, The isolated coupling emitting unit is a light-emitting diode, the isolated coupling receiving unit is a photodiode, and the light-emitting diode is configured to be driven by the first voltage and the second voltage to control the luminous brightness of the light-emitting diode.

4. The dual-port driven isolation coupling device according to claim 3, further comprising: A control waveform generator is electrically connected to the first buffer amplifier and the second buffer amplifier. The control waveform generator is configured to control the first control signal to a first high voltage level or a first low voltage level, or the control waveform generator is configured to control the second control signal to a second high voltage level or a second low voltage level.

5. The dual-port driven isolation coupling device according to claim 1, wherein, The isolation coupler is either a capacitive isolation capacitor circuit or a magnetically coupled isolation transformer circuit.

6. A dual-port driven isolation coupling device, comprising: First buffer amplifier; An isolation coupler, comprising an isolation coupling transmitter unit and an isolation coupling receiver unit, wherein the isolation coupling transmitter unit is electrically connected to the first buffer amplifier; A physical resistor electrically connected to the isolated coupled emitter unit, the impedance of which is equal to the equivalent output impedance of the first buffer amplifier; and A voltage source, electrically connected to the physical resistor, The first buffer amplifier is configured to be controlled by a first control signal to output a first voltage to one end of the isolated coupling transmitter unit; the voltage source is configured to transmit a second control signal to the physical resistor; and the physical resistor is configured to receive the second control signal to output a second voltage to the other end of the isolated coupling transmitter unit. The isolated coupling transmitting unit is configured to be driven by the first voltage and the second voltage to be isolated coupled to the isolated coupling receiving unit.

7. The dual-port driven isolation coupling device according to claim 6, wherein, The first output voltage value of the first voltage is equal to a first fixed multiple of the first input voltage value of the first control signal.

8. The dual-port driven isolation coupling device according to claim 6, wherein, The isolated coupling emitting unit is a light-emitting diode, the isolated coupling receiving unit is a photodiode, and the light-emitting diode is configured to be driven by the first voltage and the second voltage to control the luminous brightness of the light-emitting diode.

9. The dual-port driven isolation coupling device according to claim 8, further comprising: A control waveform generator is electrically connected to the first buffer amplifier. The control waveform generator is configured to control the first control signal to a first high voltage level or a first low voltage level; the first high voltage level is higher than the first low voltage level, and the first low voltage level is higher than the second voltage level; when the first control signal is at the first high voltage level, the luminous brightness of the light-emitting diode is a first brightness; when the first control signal is at the first low voltage level, the luminous brightness of the light-emitting diode is a second brightness; the first brightness is stronger than the second brightness.

10. The dual-port driven isolation coupling device according to claim 6, wherein, The isolation coupler is either a capacitive isolation capacitor circuit or a magnetically coupled isolation transformer circuit.

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