The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1990
Filed:
Sep. 15, 1989
Clay S Clement, Rock Tavern, NY (US);
Cecil T Ho, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A push pull digital-to-analog converter circuit configuration improves the signal-to-noise ratio when used in the common bipolar (both positive and negative) mode of operation, thereby improving its absolute accuracy. Digital data is supplied to a data buffer which includes an inverter. The inverter supplies the data to one of a pair of push pull connected DACS, referred to as dual DACS. The buffer supplies the data to the other DAC without inversion. The outputs of the pair of DACS are combined by an op-amp circuit which takes the two analog outputs from those circuits and combines them while the push pull circuits are opposed so noise is reduced and accuracy of the conversion is enhanced.