Method and apparatus for detecting interruption of an input...

Details Method and apparatus for detecting interruption of an input... Method and apparatus for detecting interruption of an input...

2003-06-11

2004-12-14

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

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

C330S279000, C330S136000

Reexamination Certificate

active

06831521

ABSTRACT:

BACKGROUND
Devices such as optical transceivers, limiting amplifiers and transimpedance amplifiers often include a circuit arrangement to detect interruption of an input signal. Such a circuit arrangement is referred to as a “loss-of-signal” (LOS) detector. One difficulty that may be encountered in an LOS detector is a mismatch between input and reference branches of the LOS detector. If off-chip compensation is employed, via a variable resistor for example, the mismatch problem can be avoided, but at considerable cost in terms of labor and additional hardware.


REFERENCES:
patent: 5430765 (1995-07-01), Nagahori
patent: 6232842 (2001-05-01), Asano
patent: 6292058 (2001-09-01), Ide et al.
patent: 6377082 (2002-04-01), Loinaz et al.

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