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:
May. 27, 1980
Filed:
Mar. 31, 1978
Applicant:
Inventor:
Carl F Barnhart, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ; 235 / ; 235 / ; 235 / ; 364754 ; 364761 ; 364768 ;
Abstract
Circuitry and method for adding, subtracting, multiplying and/or dividing a plurality of multi-bit, arbitrarily signed, changeable, coded digital input signals representing numerical values to convert said signals into a single analog output signal of predetermined amplitude having a fixed period but a duty cycle that is proportional to the algebraic sum or product or quotient of said input signals. This is accomplished using indirect digital-to-analog conversion.