Handout #20EE 214Winter 2009VGAs and Limiting AmplifiersB. Murmann and B. A. WooleyStanford UniversityTypical Design GoalsConstant bandwidth across wide gain rangeExponential gain control (“linear in dB”) preferred in many applications–VGA versus PGA (programmable gain amplifier, i.e. discrete steps)Low noise, low distortion, low power dissipationPoor BehaviorDesired BehaviorBarry Gilbert, “Considering Multipliers,” Analog Dialogue 42-11, November 2008B. A. Wooley, B. Murmann EE214 Winter 2008-092Barry Gilbert, Considering Multipliers,Analog Dialogue 42 11, November 2008http://www.analog.com/library/analogdialogue/archives/42-11/multipliers.html
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