Low noise amplifier for wideband tunable matching

Amplifiers – With semiconductor amplifying device – Including plural stages cascaded

Reexamination Certificate

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C330S305000, C330S098000

Reexamination Certificate

active

11241128

ABSTRACT:
Provided is a low noise amplifier with a common source and a source degeneration, which has linearity, power gain, noise factor, and lossless input matching. The low noise amplifier includes: a first inductor having one terminal connected to an input terminal receiving a signal; a second inductor having one terminal connected to a ground; a MOS transistor having a gate connected to the first inductor, a source connected to the other terminal of the second inductor, and a drain transmitting a signal; and a variable capacitor connected between the source and gate of the MOS transistor and varying an input matching frequency at the input terminal.

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patent: 6731175 (2004-05-01), Chen
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patent: 7154330 (2006-12-01), Quek
patent: 2001/0004227 (2001-06-01), Frech et al.
patent: 05-308229 (1993-11-01), None
patent: 07-066659 (1995-03-01), None
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“An Ultrawideband CMOS Low-Noise Amplifier for 3.1-10.6-GHz Wireless Receivers” by Andrea Bevilacqua et al.;IEEE Xplore—a captured copy of a web page showing publication before filing application.
“Design Criteria for Tunable Matching Networks A MEMS Perspective in the FM Band” by Amro M. Elshurafa et al.;IEEE2004; pp. 1311-1314.

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