High-dynamic-range VGA with temperature compensation and linear-in-dB gain control

作者: F. Carrara , G. Palmisano

DOI: 10.1109/JSSC.2005.852827

关键词: WidebandDynamic rangeAutomatic gain controlVideo Graphics ArrayElectrical engineeringHigh dynamic rangeCompensation (engineering)Variable-gain amplifierMaterials scienceAmplifier

摘要: This paper presents the design and measured performance of a novel intermediate-frequency variable-gain amplifier for Wideband Code-Division Multiple Access (WCDMA) transmitters. A compensation technique parasitic coupling is proposed which allows high dynamic range 77 dB to be attained at 400 MHz while using single stage. Temperature decibel-linear characteristic are achieved by means control circuit provides lower than /spl plusmn/1.5 gain error over full temperature ranges. The device fabricated in 0.8-/spl mu/m 46 GHz f/sub T/ silicon bipolar technology drains up 6 mA from 2.7-V power supply.

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