Low noise amplifier

Details Low noise amplifier Low noise amplifier

2008-02-19

2010-02-16

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S149000, C330S12400D

Reexamination Certificate

active

07663441

ABSTRACT:
A low noise amplifier includes a main amplifier configured to amplify a first input signal to generate a first output signal and an auxiliary amplifier configured to amplify a second input signal to generate a second output signal. The auxiliary amplifier is coupled to the main amplifier for superposing the second output signal and the first output signal. The low noise amplifier also includes an adjusting unit configured to adjust a time constant for reducing a third order intermodulation distortion of the superposed signal in response to a control signal. The adjusting unit is configured to generate the second input signal based on the time constant and the first input signal.

REFERENCES:
patent: 5635874 (1997-06-01), Perrot
patent: 5995819 (1999-11-01), Yamaji et al.
patent: 6828858 (2004-12-01), Larson et al.
patent: 7332961 (2008-02-01), Blednov
patent: 7425872 (2008-09-01), Inamori et al.
patent: 1020050041556 (2005-05-01), None
patent: 1020060070796 (2006-06-01), None
patent: 100614928 (2006-08-01), None

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