Amplifiers – With semiconductor amplifying device – Including gain control means
Reexamination Certificate
2006-02-17
2009-02-24
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including gain control means
C330S086000, C330S099000, C330S260000, C330S283000, C330S310000
Reexamination Certificate
active
07495514
ABSTRACT:
A low noise amplifier including a first-stage signal amplifier, a second-stage signal amplifier and a gain control unit is disclosed. The first-stage signal amplifier is for receiving an input signal and outputting a first output signal accordingly. The second-stage signal amplifier is coupled to the first-stage signal amplifier for outputting a second output signal according to the first output signal. The second-stage signal amplifier includes a first output transistor for outputting the second output signal. The gain control unit includes a first variable resistance device coupled to an input terminal of the first output transistor for adjusting voltage gain of the second output signal.
REFERENCES:
patent: 6351183 (2002-02-01), Khabbaz et al.
patent: 6630861 (2003-10-01), Kawaoka
patent: 6693492 (2004-02-01), Desize
Huang, Da-Rong, Research on Differential CMOS RFICs for WLAN and DTV Broadband RF Tuner Applications, Thesis for Master of Science, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC, Jun. 2004.
Chu Yuan-Kai
Chuang Huey-Ru
Huang Da-Rong
Himax Technologies Limited
NCKU Research and Development Foundation
Nguyen Khanh V
Rabin & Berdo P.C.
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