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A CMOS variable gain amplifier (VGA) is designed, which is suitable for the turner of digital video broadcasting-cable(DVB-C). The amplifier is consists of exponential control circuit, amplifier circuit and common mode feedback circuit. The exponential circuit is presented by an approximate exponential function. The VGA is fabricated in 0.35 mum CMOS technology, and is simulated by Mentorpsilas circuit...
This paper describes a unique method for specifying the gain control characteristics of high frequency transistors over their entire AGC range. The forward gain control characteristics of transistors can be measured by means of a curve tracer to permit the specification, within published limits, of the high frequency power gain versus collector to emitter voltage curve. While this report describes...
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