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    • 10. 发明授权
    • Active quench circuit and reset circuit for avalanche photodiode
    • 用于雪崩光电二极管的有源骤冷电路和复位电路
    • US5532474A
    • 1996-07-02
    • US532259
    • 1995-09-22
    • Henri P. E. G. DautetJoseph D. P. DesChamps
    • Henri P. E. G. DautetJoseph D. P. DesChamps
    • H03K17/0416H03K17/74H01J40/14
    • H03K17/0416H03K17/74
    • An active quench circuit for interrupting the current flow in an avalanche photodiode (APD) operating in Geiger mode and for resetting the APD. The invention increases the speed of quenching and reduces the time required to bring the APD voltage back to its operating voltage above the breakdown voltage. The circuit includes a small inductor which isolates the reset circuit from the APD during the initial discharge and which provides a current pulse into the APD immediately after the end of the quenching operation to recharge the diode. The reset circuit also includes a diode assembly that increases the speed of the avalanche current pulse and that prevents the circuit from oscillating or latching under certain operating conditions. The circuit presents a low impedance to the APD during during reset, and is much less sensitive to the APD capacitance than prior art circuits.
    • 一种用于中断在Geiger模式下操作并用于复位APD的雪崩光电二极管(APD)中的电流的有源骤冷电路。 本发明提高了淬火速度,并且减少了将APD电压恢复到高于击穿电压的工作电压所需的时间。 该电路包括一个小电感,其在初始放电期间将复位电路与APD隔离,并且在淬灭操作结束之后立即向APD提供电流脉冲以对二极管再充电。 复位电路还包括二极管组件,其增加雪崩电流脉冲的速度,并且防止电路在某些操作条件下振荡或闭锁。 该电路在复位期间对APD呈现低阻抗,并且比现有技术电路对APD电容的敏感性要低得多。