SELECTABLE PROGRAMMABLE GAIN OR OPERATIONAL AMPLIFIER

摘要

An integrated circuit amplifier (352) configurable to be either a programmable gain amplifier or an operational amplifier comprises two output blocks, one output block is optimized for programmable gain amplifier operation, and the other output block is optimized for operational amplifier applications. A common single input stage (302), input offset calibration (328) and bias generation (326) circuits are used with either amplifier configuration. Thus duplication of the input stage, offset calibration and bias generation circuits are eliminated while still selectably providing for either a programmable gain amplifier or operational amplifier configuration.