Precision avalanche photodiode current monitor

Details Precision avalanche photodiode current monitor Precision avalanche photodiode current monitor

2005-07-19

2005-07-19

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

C324S754120, C324S754120, C324S754120, C324S076110

Reexamination Certificate

active

06919716

ABSTRACT:
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.

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patent: 2003/0178552 (2003-09-01), Hofmeister et al.

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