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Four Bit, Dual Polarity Multiplying Digital To Analog Converter

IP.com Disclosure Number: IPCOM000053621D
Original Publication Date: 1981-Oct-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Cole, TG Smith, C [+details]

Abstract

A four-bit multiplying digital-to-analog converter (DAC) with unidirect current output feeds a current mirror which performs voltage level shift and current reversal. The mirror can be switched off, if required, to provide zero output irrespective of input conditions and feeds a switchable input operational amplifier which generates output voltage signals of the required gain switchable to either polarity for all digital input values.