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A low power variable gain amplifier with 50-dB dynamic range

Pilong Gao, Zhigong Wang, Jian Xu, Weibing Li, Yiqiang Wu, Lu Tang

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Abstract

This paper presents a new structure of variable gain amplifier (VGA) in which a modified Gilbert Cell is firstly proposed to implement a low power wide dynamic range VGA. The proposed VGA can provide 50-dB dynamic range within a linear error of 1-dB. Furthermore, the proposed circuit consumes less than 0.5-mA current and occupies about only 0.12-mm2chip area, both of which are relatively low in terms of the wide dynamic range provided by it.

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What this paper is about

This paper presents a new structure of variable gain amplifier (VGA) in which a modified Gilbert Cell is firstly proposed to implement a low power wide dynamic range VGA. The proposed VGA can provide 50-dB dynamic range within a linear error of 1-dB. Furthermore, the proposed circuit consumes less than 0.5-mA current and occupies about only 0.12-mm2chip area, both of which are relatively low in terms of the wide dynamic range provided by it.

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Available abstract

This paper presents a new structure of variable gain amplifier (VGA) in which a modified Gilbert Cell is firstly proposed to implement a low power wide dynamic range VGA. The proposed VGA can provide 50-dB dynamic range within a linear error of 1-dB. Furthermore, the proposed circuit consumes less than 0.5-mA current and occupies about only 0.12-mm2chip area, both of which are relatively low in terms of the wide dynamic range provided by it.

Key concepts: Video Graphics Array, Variable-gain amplifier, Dynamic range, Wide dynamic range, Amplifier, Range (aeronautics), Power (physics), Variable (mathematics)

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