Automatically adjusting low noise amplifier

Details Automatically adjusting low noise amplifier Automatically adjusting low noise amplifier

2006-07-25

2006-07-25

Mottola, Steven J. (Department: 2817)

Amplifiers

With amplifier condition indicating or testing means

Reexamination Certificate

active

07081791

ABSTRACT:
A low noise amplifier circuit (10) includes an attenuator (12) for receiving a calibration signal and generating an attenuated calibration signal. A low noise amplifier (14) amplifies the attenuated calibration signal in calibration mode or amplifies a functional signal in functional mode. In calibration mode, a envelope detector/comparator (16) compares the calibration signal with the output of the low noise amplifier and generates a compensation signal indicating a deviation between the two signals. The gain of the low noise amplifier is adjusted responsive to the compensation signal.

REFERENCES:
patent: 5426641 (1995-06-01), Afrashteh et al.
patent: 5861774 (1999-01-01), Blumenthal
patent: 6175279 (2001-01-01), Ciccarelli et al.
patent: 2002/0070808 (2002-06-01), Tichauer
patent: 2003/0073419 (2003-04-01), Chadwick

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