雪崩光电二极管偏压自动温度补偿电路设计

Design of APD Bias Voltage Automatic Temperature Compensation Circuit

针对雪崩光电二极管击穿电压随环境温度变化的工作特性,对雪崩光电二极管工作偏压温度补偿的原理进行了分析。提出了一种雪崩光电二极管偏压自动温度补偿电路设计方法。补偿电路包括温度传感器、运算放大电路和高压电源模块。温度传感器输出的温度信号经过运算放大电路的变换后,作为控制电压输入至高压电源模块,高压模块输出的雪崩光电二极管工作偏压改变,从而达到补偿雪崩光电二极管工作偏压的目的。试验表明,该电路可在-40℃^+60℃范围内对雪崩光电二极管的偏压进行精确地补偿。补偿电路具有电路简单、低功耗、实时性好、成本低等优点。

The principle of APD working bias voltage temperature compensation is analyzed for the operating characteristics of breakdown voltage with ambient temperature.A design method of bias voltage automatic temperature compensation circuit is proposed,the circuit includes a temperature sensor,an operational amplifier circuit,and a high voltage module.After the temperature signal outputted by the temperature sensor is converted by the operational amplifier circuit,the control voltage is input to the high voltage module,and the APD working bias voltage outputted by the high voltage module is changed,thereby achieving the purpose of compensation the APD working bias voltage.The experimental verification shows that the circuit can accurately compensate the APD working bias voltage in the range of-40℃to+60 ℃.The circuit has the advantages of simple,low power consumption,good real-time performance and low cost.