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Compensating Non-Ideal Voltage Switches in Digital-To-Analog Converters (R/2r Conductors)

IP.com Disclosure Number: IPCOM000064636D
Original Publication Date: 1985-Aug-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Krumrein, W [+details]

Abstract

From the known circuit shown in Fig. 1, the following compensations are known: a) Switch not ideal, but resistance value Rx identical in both directions (+U and -U). R2 is chosen to be: R2 = 2R - Rx (Fig. 2). b) Switch not ideal, but different resistance values --- in the +U direction R', --- in the -U direction R". The values of R1, R2 are chosen to be such that R2 = 2R - R' and R2 = 2R - R", respectively, is still within the permissible tolerance for R2. From the standpoint of circuit technology, however, it would be inexpedient in particular instances to choose the values of R1/R2 such that R' and R", respectively, are absorbed by the tolerance of R2.