Variable gain amplifier and receiver including the same

Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation

Reexamination Certificate

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C455S241100, C330S259000

Reexamination Certificate

active

08050642

ABSTRACT:
Provided are a variable gain amplifier and a receiver including the same. The variable gain amplifier includes: a gain controller generating a gain control voltage; a variable gain amplifier amplifying an input signal and a feedback signal by using a voltage gain that is linearly proportional to the gain control voltage, and converting the amplified signal into a predetermined magnitude of a signal; and an offset canceller removing an offset from an output signal of the variable gain amplifier and outputting the offset removed result as the feedback signal. The variable gain amplifier includes a plurality of operational transconductance amplifiers.

REFERENCES:
patent: 4591828 (1986-05-01), Storey
patent: 6169638 (2001-01-01), Morling
patent: 6992526 (2006-01-01), Cheng
patent: 2003/0169114 (2003-09-01), Manapragada et al.
patent: 2006/0017827 (2006-01-01), Tani et al.
patent: 2007/0126501 (2007-06-01), Kim et al.
patent: 2007/0164823 (2007-07-01), Hsieh et al.
patent: 100648379 (2006-11-01), None
patent: 1020070037952 (2007-04-01), None
patent: 1020070097937 (2007-10-01), None
Jianhong Xiao, et al. “A High Dynamic Range CMOS Variable Gain Amplifier for Mobile DTV Tuner” IEEE Journal of Solid-State Circuits, vol. 42, No. 2, Feb. 2007.

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