Apparatus and method for amplifying an amplitude-varying signal

Details Apparatus and method for amplifying an amplitude-varying signal Apparatus and method for amplifying an amplitude-varying signal

1997-02-28

2000-07-04

Hunter, Daniel S.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455251, 455333, 455303, 330295, 333100, H04B 106

Patent

active

060850744

ABSTRACT:
An amplifier (300) comprising two amplifier stages (301, 303), a signal splitter (305), and a signal combiner (307) amplifies an amplitude-varying input signal (128) in the following manner. The signal splitter (305) receives a signal of varying amplitude (128) and splits the received signal into a first amplitude-varying signal (325) and a second amplitude-varying signal (327). The first amplifier stage (301) applies a first gain to the first amplitude-varying signal (325). The second amplifier stage (303) applies a second gain that is greater than the first gain to the second amplitude-varying signal (327) only when an amplitude of the second amplitude-varying signal (327) exceeds a threshold. The signal combiner (307) combines the amplified signals outputted from the amplifier stages (301, 303) to produce the amplifier output signal.

REFERENCES:
patent: 5548246 (1996-08-01), Yamamoto et al.
patent: 5684430 (1997-11-01), Yamamoto
patent: 5757229 (1998-05-01), Mitzlaff

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