Fully integrated received signal strength indicator for a...

Details Fully integrated received signal strength indicator for a... Fully integrated received signal strength indicator for a...

2005-04-05

2005-04-05

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including atomic particle or radiant energy impinging on a...

C250S2140AG

Reexamination Certificate

active

06876259

ABSTRACT:
A transimpedance amplifier (TIA) circuit and received signal strength indicator (RSSI) circuit are provided on a same integrated circuit substrate for providing of a TIA output signal and a RSSI signal. The RSSI signal is being used as an indication of optical alignment when aligning of an optical fiber to a photodetector coupled with the TIA during optical receiver manufacture or as received optical signal strength during operation. This allows for the TIA and RSSI circuit to be disposed within an optical signal receiver module prior to optical alignment. The TIA overcomes limitations of the prior art by allowing for a 2V reverse bias voltage to be provided on a PIN diode when the PIN diode is used with a single ended 3.3V supply voltage.

REFERENCES:
patent: 6342694 (2002-01-01), Satoh
patent: 6552605 (2003-04-01), Yoon
patent: 6803825 (2004-10-01), Chiou et al.

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