Variable gain low noise amplifier

Details Variable gain low noise amplifier Variable gain low noise amplifier

2005-08-23

2005-08-23

Mottola, Steven J. (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S283000, C330S305000

Reexamination Certificate

active

06933779

ABSTRACT:
The present invention is related to a variable gain low noise amplifier that optimizes input matching, gain and noise characteristics, and linearity. The variable gain low noise amplifier according to an embodiment of the present invention includes a first amplifying cell that operates in a high gain mode, a second amplifying cell that operates in a low gain mode, a selectively matching circuit, and a first short-circuit means. The variable gain low noise amplifier according to the present invention selects the best operation in each gain mode so that the circuit operated in high and low gain modes does not affect a load of another circuit.

REFERENCES:
patent: 5548246 (1996-08-01), Yamamoto et al.
patent: 6144254 (2000-11-01), Irvine et al.
patent: 6586993 (2003-07-01), Macedo

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