Browse Prior Art Database

DISCRETE GAIN CONTROLLED AMPLIFIER

IP.com Disclosure Number: IPCOM000005920D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-15
Document File: 1 page(s) / 60K

Publishing Venue

Motorola

Related People

Authors:
Stuart G. Langley

Abstract

Digital gain control of amplifier circuits is required in the design of many linear circuits. This can be achieved by digitally selecting various feedback resistors, usually employing a DAC, to modify the gain of an op amp circuit. Such a design is limited to low power output, which must be amplified by additional analog circuitry, requires multiple supply voltages, and expensive components.