WO2019072000A1 - 无人驾驶光电软驱动恒流电路、集成电路与控制系统 - Google Patents

无人驾驶光电软驱动恒流电路、集成电路与控制系统 Download PDF

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WO2019072000A1
WO2019072000A1 PCT/CN2018/097975 CN2018097975W WO2019072000A1 WO 2019072000 A1 WO2019072000 A1 WO 2019072000A1 CN 2018097975 W CN2018097975 W CN 2018097975W WO 2019072000 A1 WO2019072000 A1 WO 2019072000A1
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transistor
circuit
unmanned
constant current
photoelectric
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PCT/CN2018/097975
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English (en)
French (fr)
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蔡祥云
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蔡祥云
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is dc characterised by reference voltage circuitry, e.g. soft start, remote shutdown

Definitions

  • the present invention relates to the field of semiconductor integrated circuit technology, and in particular, to an unmanned photoelectric soft drive constant current circuit, an integrated circuit and a control system.
  • the operating environment of unmanned intelligent IoT devices such as drones and unmanned vehicles is uncertain and complex, and it is necessary to continuously detect the surrounding environment to avoid collision with obstacles.
  • the traditional UAV adopts the acoustic intelligent identification technology solution. One method is to scan the radar itself in all directions, and the other method is to use phased array radar. These two schemes need to add complicated motor equipment to generate additional load.
  • the traditional unmanned vehicle adopts the visual intelligent recognition technology scheme and adopts the mature technology of image processing, but it is easy to receive the influence of light, dust, smoke and other factors, and cannot meet the driving needs of all weather.
  • the advantage of this application scheme over the switching power supply scheme is that the system structure is simple and the components are used less.
  • the disadvantage is that the number of system loads must be designed strictly according to the input voltage. The change of the input voltage will cause the change of the input power of the whole system, thereby affecting the system.
  • Light efficiency With the continuous development of laser technology, laser radar has been used more and more widely in various fields. For example, in the field of detection, laser radar is often used to detect dynamic objects. At this time, the measurement angle is increased and no blind zone is required, and it is also necessary to adapt to long distance or close distance measurement. When measuring at close range, the power of the laser radar is small, which can meet the safety requirements of the human eye, but the ranging capability is weak. When the distance is measured, the power of the laser radar is large, but the safety requirements of the human eye cannot be met, and the distance is close. Stray light will increase and cause it to be unusable at a distance.
  • the invention aims at the deficiencies of the prior art, and proposes an unmanned photoelectric soft drive constant current circuit, an integrated circuit and a control system, which solves the problem that the change of the input voltage causes the input power of the whole system to change, thereby affecting the efficiency of the system. Light effect problem.
  • the present invention adopts the following technical solutions:
  • the present invention provides an unmanned optoelectronic soft drive constant current circuit comprising:
  • a constant current circuit that adjusts a loop current of the unmanned photoelectric soft drive constant current circuit such that the loop current remains constant
  • the startup circuit includes two transistors, wherein:
  • the drain and the gate of the first N transistor (N1) are connected in parallel, and are simultaneously connected to the drain of the first P transistor (P1), the gate of the second N transistor (N2), and the source is grounded;
  • the source of the first P transistor (P1) and the drain of the second N transistor (N2) are simultaneously connected to the DC power supply terminal, and the gate is grounded;
  • the constant current circuit includes an operational amplifier, an electro-optical diode, a transistor and a resistor, wherein:
  • the source of the third N transistor (N3) is connected to the negative input terminal of the operational amplifier through the first resistor (R1), the adjustment circuit port, and the drain passes through the source of the reverse electro-optical diode (D1) and the second N transistor (N2). Pole connection
  • the positive input terminal of the operational amplifier is connected to a reference voltage Vref, and the output terminal is connected to a gate of the third N transistor (N3).
  • the electro-optical diode (D1) comprises a single electro-optical diode or an electro-optical diode string.
  • the area of the first N transistor (N1) and the third N transistor (N3) are equal.
  • the transistor adopts one or more of a field effect transistor and a bipolar transistor.
  • the first N transistor (N1) and the second N transistor (N2) are NMOS transistors
  • the first P transistor (P1) is a PMOS transistor.
  • the present invention provides an unmanned optoelectronic driving integrated circuit, comprising: an adjustment circuit, the unmanned photoelectric soft-drive constant current circuit according to the first aspect, wherein the adjustment circuit comprises a grounded sampling resistor Rext, The sampling resistor adjusts the current of the electro-optical diode D1 in the constant current circuit to maintain a constant current per unit time.
  • the present invention provides an unmanned photoelectric driving control system, comprising: a rectifying circuit, the unmanned photoelectric soft driving constant current circuit according to the first aspect, wherein the rectifying circuit performs full-wave rectification on an alternating current, and is connected The startup circuit is powered.
  • the invention has the beneficial effects that the unmanned photoelectric soft-drive constant current circuit, the integrated circuit and the control system of the invention use the constant current circuit protected by the soft drive circuit to provide automatic gain control, constant current and constant voltage for the connected load.
  • the working environment has a high power supply rejection ratio, which solves the problem of light efficiency that affects the efficiency of the system when the input voltage changes will cause changes in the input power of the entire system.
  • FIG. 1 is a circuit diagram of an embodiment of a prior art unmanned photoelectric soft drive constant current circuit.
  • FIG. 2 is a schematic structural view of an embodiment of an unmanned photoelectric soft-drive constant current circuit of the present invention.
  • the unmanned photoelectric soft drive constant current circuit, the integrated circuit and the control system provided by the embodiments of the present invention can be applied to various scenarios in the field of intelligent identification technology of the Internet of Things, including but not limited to 2G GSM, 3G CDMA, 4G LTE. /LTE-A, 5G eMBB mobile communication, trunking communication, satellite communication, laser communication, optical fiber communication, digital television, radio frequency identification, power carrier, unmanned vehicle, drone, internet of things, radar, etc., implementation of the present invention This example does not impose any particular limitation.
  • the invention provides an unmanned photoelectric soft drive constant current circuit, as shown in FIG. 2, comprising:
  • Constant current circuit adjusting the loop current of the unmanned photoelectric soft drive constant current circuit, so that the loop current is kept constant
  • the startup circuit includes two transistors, wherein the drain and the gate of the first N transistor (N1) are connected in parallel, and simultaneously with the drain of the first P transistor (P1) and the second N transistor (N2) The gate is connected and the source is grounded; the source of the first P transistor (P1) and the drain of the second N transistor (N2) are simultaneously connected to the DC power supply terminal, and the gate is grounded.
  • the constant current circuit includes an operational amplifier, an electro-optical diode, a transistor and a resistor, wherein a source of the third N transistor (N3) passes through the first resistor (R1) and a negative input terminal of the operational amplifier, Adjusting the circuit port connection, the drain is connected to the source of the second N transistor (N2) through the reverse electro-optical diode (D1); the positive input terminal of the operational amplifier is connected to the reference voltage Vref, and the output terminal is connected to the third N transistor (N3) The gate is connected.
  • the electro-optical diode (D1) comprises a single electro-optical diode or an electro-optical diode string.
  • the first N transistor (N1) and the second N transistor (N2) are NMOS transistors of equal area
  • the first P transistor (P1) is a PMOS transistor.
  • the transistor may be one or more of a field effect transistor and a bipolar transistor.
  • the transistor may be a structure in which the gate and the source of the depletion-type N-channel MOS transistor are connected. Although not shown, the gate of the depletion-type P-channel MOS transistor may be connected to the source. structure.
  • An unmanned optoelectronic driving integrated circuit comprising an adjustment circuit and the above-mentioned unmanned photoelectric soft-drive constant current circuit, wherein the adjustment circuit comprises a grounded sampling resistor Rext, the sampling resistor adjusting the electro-optical diode (D1) load in unit time The current inside is kept constant.
  • the invention also provides an unmanned photoelectric driving control system, comprising a rectifying circuit and the above-mentioned unmanned photoelectric soft driving constant current circuit, wherein the rectifying circuit performs full-wave rectification on the alternating current to supply power to the connected constant current circuit.
  • the invention provides an unmanned photoelectric soft drive constant current circuit, as shown in FIG. 2, comprising:
  • Constant current circuit adjusting the loop current of the unmanned photoelectric soft drive constant current circuit, so that the loop current is kept constant
  • the startup circuit includes two transistors, wherein the drain and the gate of the first N transistor (N1) are connected in parallel, and simultaneously with the drain of the first P transistor (P1) and the second N transistor (N2) The gate is connected and the source is grounded; the source of the first P transistor (P1) and the drain of the second N transistor (N2) are simultaneously connected to the DC power supply terminal, and the gate is grounded.
  • the constant current circuit includes an operational amplifier, an electro-optical diode, a transistor and a resistor, wherein a source of the third N transistor (N3) passes through the first resistor (R1) and a negative input terminal of the operational amplifier, Adjusting the circuit port connection, the drain is connected to the source of the second N transistor (N2) through the reverse electro-optical diode (D1); the positive input terminal of the operational amplifier is connected to the reference voltage Vref, and the output terminal is connected to the third N transistor (N3) The gate is connected.
  • the electro-optical diode (D1) comprises a single electro-optical diode or an electro-optical diode string.
  • the first N transistor (N1) and the second N transistor (N2) are NMOS transistors of equal area
  • the first P transistor (P1) is a PMOS transistor.
  • the transistor may be one or more of a field effect transistor and a bipolar transistor.
  • the transistor may be a structure in which the gate and the source of the depletion-type N-channel MOS transistor are connected. Although not shown, the gate of the depletion-type P-channel MOS transistor may be connected to the source. structure.
  • An unmanned optoelectronic driving integrated circuit comprising an adjustment circuit and the above-mentioned unmanned photoelectric soft-drive constant current circuit, wherein the adjustment circuit comprises a grounded sampling resistor Rext, the sampling resistor adjusting the electro-optical diode (D1) load in unit time The current inside is kept constant.
  • the invention also provides an unmanned photoelectric driving control system, comprising a rectifying circuit and the above-mentioned unmanned photoelectric soft driving constant current circuit, wherein the rectifying circuit performs full-wave rectification on the alternating current to supply power to the connected constant current circuit.
  • the driving circuit composed of the first P transistor (P1) and the first N transistor (N1) provides a soft driving environment for the automatic control circuit composed of the operational amplifier and the third N transistor (NN3), thereby ensuring a soft driving environment.
  • the light source load electro-optical diode (D1) operates normally under stable operating conditions.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
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  • Automation & Control Theory (AREA)
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Abstract

一种无人驾驶光电软驱动恒流电路、集成电路与控制系统，其中，光电软驱动恒流电路包括启动电路、恒流电路，利用软驱动电路保护的恒流电路，为所连接的负载提供自动增益控制的、恒流恒压的工作环境，具有较高的电源抑制比，解决了输入电压的变化会导致整个系统输入功率的变化，从而影响系统效率的光效问题。

Description

无人驾驶光电软驱动恒流电路、集成电路与控制系统 技术领域
本发明涉及半导体集成电路技术领域，尤其涉及一种无人驾驶光电软驱动恒流电路、集成电路与控制系统。
 背景技术
无人机、无人车等无人驾驶智能物联网设备的运作环境具有不确定性与复杂性, 需要不断对周围环境进行探测，避免与障碍物发生碰撞。传统的无人机采用声波智能识别技术方案，一种方法是雷达自身全方位实现扫描，另一种方法是采用相控阵雷达，这两种方案需要增加复杂的电机设备从而产生额外的负载。传统的无人车采用视觉智能识别技术方案，采用图像处理的成熟技术，但易收到光线、粉尘、烟雾等因素的影响，不能满足全天候驾驶需要。
    现有技术中，常见的方案如图1所示，包括整流电路、恒流驱动电路以及负载，其恒流输出为Iout＝Vref/Rcs。
 技术问题
此应用方案相对于开关电源方案优点在于系统结构简单，使用元器件少，缺点在于系统负载的数量必须严格按照输入电压来设计，输入电压的变化会导致整个系统输入功率的变化，从而影响系统的光效效率。随着激光技术的不断发展，激光雷达在各个领域得到越来越广泛的使用。例如，在检测领域，激光雷达常用于检测动态物体，此时测量角度增大且要求无盲区，还需要适应远距离或者近距离测距。当近距离测距时，激光雷达功率小，可以满足人眼安全要求，但是测距能力较弱；当远距离测距时，激光雷达功率大，但是无法满足人眼安全要求，并且近距离的杂散光会增加导致距离下无法使用。
    综上所述，需要设计一种自动增益控制的、恒流恒压的应用于无人机、无人车智能识别的无人驾驶光电软驱动恒流电路、集成电路与控制系统。
 技术解决方案
本发明针对现有技术的不足，提出一种无人驾驶光电软驱动恒流电路、集成电路与控制系统，解决了在输入电压的变化会导致整个系统输入功率的变化，从而影响系统的效率的光效问题。
    为实现上述目的，本发明采用如下的技术方案：
第一方面，本发明提出一种无人驾驶光电软驱动恒流电路，包括：
启动电路，接电源端，为所连接的恒流电路提供软启动电压；
恒流电路，调节所述无人驾驶光电软驱动恒流电路的回路电流，使得所述回路电流保持恒定；
所述启动电路包括二个晶体管，其中：
第一N晶体管（N1）的漏极、栅极并接，并同时与第一P晶体管（P1）的漏极、第二N晶体管（N2）的栅极连接，源极接地；
所述第一P晶体管（P1）的源极与第二N晶体管（N2）的漏极同时连接至直流电源端，栅极接地；
所述恒流电路包括一个运算放大器、一个电光二极管、一个晶体管与一个电阻，其中：
第三N晶体管（N3）的源极通过第一电阻（R1）与运算放大器的负输入端、调整电路端口连接，漏极通过反向电光二极管（D1）与第二N晶体管（N2）的源极连接；
所述运算放大器的正输入端与参考电压Vref连接，输出端与所述第三N晶体管（N3）的栅极连接。
优选地，所述电光二极管（D1）包括单个电光二极管或电光二极管串。
优选地，所述第一N晶体管（N1）与第三N晶体管（N3）的面积相等。
优选地，所述晶体管采用场效应管、双极晶体管中的一种或多种。
优选地，所述第一N晶体管（N1）、第二N晶体管（N2）为NMOS管，所述第一P晶体管（P1）为PMOS管。
第二方面，本发明提出一种无人驾驶光电驱动集成电路，包括调整电路、第一方面所述的无人驾驶光电软驱动恒流电路，所述调整电路包括一接地的采样电阻Rext，所述采样电阻调节所述恒流电路中的电光二极管D1负载在单位时间内的电流保持恒定。
第三方面，本发明提出一种无人驾驶光电驱动控制系统，包括整流电路、第一方面所述的无人驾驶光电软驱动恒流电路，所述整流电路对交流电进行全波整流，对连接的所述启动电路进行供电。
 有益效果
本发明的有益效果：本发明的无人驾驶光电软驱动恒流电路、集成电路与控制系统，利用软驱动电路保护的恒流电路，为所连接的负载提供自动增益控制的、恒流恒压的工作环境，具有较高的电源抑制比，解决了在输入电压的变化会导致整个系统输入功率的变化，从而影响系统的效率的光效问题。
 附图说明
用附图对本发明作进一步说明，但附图中的实施例不构成对本发明的任何限制。
图1是现有技术无人驾驶光电软驱动恒流电路一实施例电路示意图。
图2是本发明的无人驾驶光电软驱动恒流电路一实施例结构示意图。
 本发明的最佳实施方式
下面结合附图与实施例对本发明技术方案作进一步的说明，这是本发明的较佳实施例。
本发明实施例提供的一种无人驾驶光电软驱动恒流电路、集成电路与控制系统可以应用于物联网智能识别技术领域中的各个场景，包括但不局限于2G GSM、3G CDMA、4G LTE/LTE-A、5G eMBB的移动通信、集群通信、卫星通信、激光通信、光纤通信、数字电视、射频识别、电力载波、无人车、无人机、物联网、雷达等系统，本发明实施例对此不作特别限制。
本发明提出一种无人驾驶光电软驱动恒流电路，如图2所示，包括：
启动电路，接电源端，为所连接的恒流电路提供软启动电压；
恒流电路，调节无人驾驶光电软驱动恒流电路的回路电流，使得回路电流保持恒定；
本实施例中，启动电路包括二个晶体管，其中，第一N晶体管（N1）的漏极、栅极并接，并同时与第一P晶体管（P1）的漏极、第二N晶体管（N2）的栅极连接，源极接地；第一P晶体管（P1）的源极与第二N晶体管（N2）的漏极同时连接至直流电源端，栅极接地。
    本实施例中，恒流电路包括一个运算放大器、一个电光二极管、一个晶体管与一个电阻，其中，第三N晶体管（N3）的源极通过第一电阻（R1）与运算放大器的负输入端、调整电路端口连接，漏极通过反向电光二极管（D1）与第二N晶体管（N2）的源极连接；运算放大器的正输入端与参考电压Vref连接，输出端与第三N晶体管（N3）的栅极连接。其中，电光二极管（D1）包括单个电光二极管或电光二极管串。
    本实施例中，第一N晶体管（N1）、第二N晶体管（N2）为面积相等的NMOS管，第一P晶体管（P1）为PMOS管。需要说明的是，晶体管可以是采用场效应管、双极晶体管中的一种或多种。晶体管也可以是耗尽型N沟道MOS晶体管的栅极与源极连接的结构，虽未作图示，不过当然也可以是将耗尽型P沟道MOS晶体管的栅极与源极连接的结构。
    由调整电路、上述的无人驾驶光电软驱动恒流电路构成的无人驾驶光电驱动集成电路，其中，调整电路包括一接地的采样电阻Rext，该采样电阻调节电光二极管（D1）负载在单位时间内的电流保持恒定。
    本发明还提出一种无人驾驶光电驱动控制系统，包括整流电路、上述的无人驾驶光电软驱动恒流电路，整流电路对交流电进行全波整流，对连接的恒流电路进行供电。
 本发明的实施方式
下面结合附图与实施例对本发明技术方案作进一步的说明。
本发明提出一种无人驾驶光电软驱动恒流电路，如图2所示，包括：
启动电路，接电源端，为所连接的恒流电路提供软启动电压；
恒流电路，调节无人驾驶光电软驱动恒流电路的回路电流，使得回路电流保持恒定；
本实施例中，启动电路包括二个晶体管，其中，第一N晶体管（N1）的漏极、栅极并接，并同时与第一P晶体管（P1）的漏极、第二N晶体管（N2）的栅极连接，源极接地；第一P晶体管（P1）的源极与第二N晶体管（N2）的漏极同时连接至直流电源端，栅极接地。
本实施例中，恒流电路包括一个运算放大器、一个电光二极管、一个晶体管与一个电阻，其中，第三N晶体管（N3）的源极通过第一电阻（R1）与运算放大器的负输入端、调整电路端口连接，漏极通过反向电光二极管（D1）与第二N晶体管（N2）的源极连接；运算放大器的正输入端与参考电压Vref连接，输出端与第三N晶体管（N3）的栅极连接。其中，电光二极管（D1）包括单个电光二极管或电光二极管串。
    本实施例中，第一N晶体管（N1）、第二N晶体管（N2）为面积相等的NMOS管，第一P晶体管（P1）为PMOS管。需要说明的是，晶体管可以是采用场效应管、双极晶体管中的一种或多种。晶体管也可以是耗尽型N沟道MOS晶体管的栅极与源极连接的结构，虽未作图示，不过当然也可以是将耗尽型P沟道MOS晶体管的栅极与源极连接的结构。
    由调整电路、上述的无人驾驶光电软驱动恒流电路构成的无人驾驶光电驱动集成电路，其中，调整电路包括一接地的采样电阻Rext，该采样电阻调节电光二极管（D1）负载在单位时间内的电流保持恒定。
    本发明还提出一种无人驾驶光电驱动控制系统，包括整流电路、上述的无人驾驶光电软驱动恒流电路，整流电路对交流电进行全波整流，对连接的恒流电路进行供电。
 工业实用性
本发明的工作原理：由第一P晶体管（P1）、第一N晶体管（N1）构成的驱动电路为由运算放大器与第三N晶体管（NN3）构成的自动控制电路提供软驱动环境，保证了光源负载电光二极管（D1）在稳定的工作条件下正常工作。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (4)

  1. 一种无人驾驶光电软驱动恒流电路，其特征在于，包括：
    启动电路，接电源端，为所连接的恒流电路提供软启动电压；
    恒流电路，调节所述无人驾驶光电软驱动恒流电路的回路电流，使得所述回路电流保持恒定；
    所述启动电路包括二个晶体管，所述晶体管采用场效应管、双极晶体管中的一种或多种，其中：
    第一N晶体管（N1）的漏极、栅极并接，并同时与第一P晶体管（P1）的漏极、第二N晶体管（N2）的栅极连接，源极接地；
    所述第一P晶体管（P1）的源极与第二N晶体管（N2）的漏极同时连接至直流电源端，栅极接地；所述第一N晶体管（N1）、第二N晶体管（N2）为NMOS管，所述第一P晶体管（P1）为PMOS管；
    所述恒流电路包括一个运算放大器、一个电光二极管、一个晶体管与一个电阻，其中：
    第三N晶体管（N3）的源极通过第一电阻（R1）与运算放大器的负输入端、调整电路端口连接，漏极通过反向电光二极管（D1）与第二N晶体管（N2）的源极连接；
    所述运算放大器的正输入端与参考电压Vref连接，输出端与所述第三N晶体管（N3）的栅极连接，所述第一N晶体管（N1）与第三N晶体管（N3）的面积相等。
  2. 根据权利要求1所述的无人驾驶光电软驱动恒流电路，其特征在于，所述电光二极管（D1）包括单个电光二极管或电光二极管串。
  3. 一种无人驾驶光电驱动集成电路，其特征在于，包括调整电路、权利要求1-2任一项所述的无人驾驶光电软驱动恒流电路，所述调整电路包括一接地的采样电阻Rext，所述采样电阻调节所述恒流电路中的电光二极管D1负载在单位时间内的电流保持恒定。
  4. 一种无人驾驶光电驱动控制系统，其特征在于，包括整流电路、权利要求1-2任一项所述的无人驾驶光电软驱动恒流电路，所述整流电路对交流电进行全波整流，对连接的所述启动电路进行供电。
PCT/CN2018/097975 2017-10-09 2018-08-01 无人驾驶光电软驱动恒流电路、集成电路与控制系统 WO2019072000A1 (zh)

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