发明授权
- 专利标题： Precision avalanche photodiode current monitor
- 专利标题（中）： 精密雪崩光电二极管电流监视器
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申请号： US10229665申请日： 2002-08-28
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公开(公告)号： US06919716B1公开(公告)日： 2005-07-19
- 发明人: Kevin Buehler
- 申请人： Kevin Buehler
- 申请人地址： US CA San Jose
- 专利权人： Cisco Technology, Inc.
- 当前专利权人： Cisco Technology, Inc.
- 当前专利权人地址： US CA San Jose
- 代理机构： Ritter, Lang & Kaplan LLP
- 主分类号： G01R19/00
- IPC分类号： G01R19/00 ; G01R31/302 ; G01R31/305 ; G01R31/308 ; H03F3/08 ; H04B10/158
摘要：
Precision measurement of optical signal power is provided. In one implementation, a Wilson current mirror senses current through an avalanche photodiode (APD) that has been exposed to the optical signal. The output of this APD may also be used to recover data. By incorporating a high voltage transistor as the buffer, the Wilson current mirror is able to operate in series with the APD at a high bias level.