Invention Grant
US08901475B1 Avalanche photodiode biasing system including a current mirror, voltage-to-current converter circuit, and a feedback path sensing an avalanche photodiode voltage
有权
雪崩光电二极管偏置系统包括电流镜，电压 - 电流转换器电路和感测雪崩光电二极管电压的反馈路径
- Patent Title: Avalanche photodiode biasing system including a current mirror, voltage-to-current converter circuit, and a feedback path sensing an avalanche photodiode voltage
- Patent Title (中): 雪崩光电二极管偏置系统包括电流镜，电压 - 电流转换器电路和感测雪崩光电二极管电压的反馈路径
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Application No.: US13538850Application Date: 2012-06-29
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Publication No.: US08901475B1Publication Date: 2014-12-02
- Inventor: Daniel Joffe , Phillip Herron
- Applicant: Daniel Joffe , Phillip Herron
- Applicant Address: US AL Huntsville
- Assignee: ADTRAN, Inc.
- Current Assignee: ADTRAN, Inc.
- Current Assignee Address: US AL Huntsville
- Agency: Maynard, Cooper & Gale, P.C.
- Agent Jon E. Holland
- Main IPC: H01J40/14
- IPC: H01J40/14 ; H03F3/08
Abstract:
A system has a current mirror that has an input node and an output node and an avalanche photodiode (APD) coupled to the output node of the current mirror. The system also has a nonlinear voltage-to-current conversion element coupled to the input node of the current mirror that transmits current through the current mirror and the APD. Further, the system has a feedback path coupled between the output node of the current mirror and the voltage-to-current conversion element that senses a voltage across the APD and provides, based on the sensed voltage, an input signal to the voltage-to-current conversion element for controlling the element's output current, and the feedback path is arranged to limit a voltage of the input signal such that the output current is limited thereby preventing damage to the APD.
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