Signal strength detection circuits for high speed optical...

Details Signal strength detection circuits for high speed optical... Signal strength detection circuits for high speed optical...

2005-02-28

2008-12-30

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

Reexamination Certificate

active

07470884

ABSTRACT:
This disclosure is generally concerned with devices for determining photocurrent levels. One example of such a device is an optoelectronic transceiver that includes a laser and a photodetector. The photodetector is configured to receive an optical signal and generate a corresponding electrical signal. The electrical signal is received by a first stage circuit which then converts the received electrical signal to a differential output. Finally, a second stage circuit in communication with the first stage circuit is configured to derive an optical signal strength of the optical signal based upon the differential output received from the first stage circuit.

REFERENCES:
patent: 5237526 (1993-08-01), Delagrange
patent: 6366165 (2002-04-01), Huijsing et al.
patent: 6528777 (2003-03-01), Ames et al.
patent: 6855920 (2005-02-01), Shapiro
U.S. Appl. No. 11/068,657, filed Feb. 28, 2005 entitled “Signal Strength Detection Circuits for High Speed Optical Electronics.”.

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