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发明授权
CN106033225B 低功耗APD偏压控制器与偏压控制方法及光电接收器 有权 转让

低功耗APD偏压控制器与偏压控制方法及光电接收器
摘要：
本发明提供了一种APD偏压控制方法，包括：采集与流经APD的光电流信号对应的光电流强度电压信号；将光电流强度电压信号与偏压设定信号叠加后产生控制信号，用于控制可调供电电源输出电压与APD电压之间的电压降；同步调整可调供电电源输出电压和偏压设定信号，将电压降控制在预定范围内。本发明还提供了一种APD偏压控制器，包括：偏置电压产生单元，用于根据来自外部的光电流强度反馈信号产生偏置电压信号用于决定APD偏压，其中，该偏置电压产生单元还产生第二电压信号，并将所述第二电压信号与一个或多个参考电压相比较，用以产生欠压或过压指示。本发明的APD偏压控制器及光电接收器具有低功耗、高动态，高信噪比，高灵敏度和及时温度补偿的优点。
摘要（英）：

An avalanche photodiode (APD) bias control method may include acquiring a photocurrent intensity voltage and generating a control signal by superposing the acquired photocurrent intensity voltage and a bias setting signal, wherein the control signal controls a voltage drop between an adjustable power supply output voltage and a voltage of the APD. The APB bias control method may further include adjusting the adjustable power supply output voltage and the bias setting signal simultaneously so that the voltage drop is within a target voltage drop range and the APD bias voltage approaches a bias voltage that corresponds to an APD optical input power. An avalanche photodiode (APD) bias controller and an avalanche photodiode (APD) photoelectric receiver are also provided.

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