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:
Dec. 27, 1994
Filed:
Feb. 22, 1993
William T Colleran, Manhattan Beach, CA (US);
Asad A Abidi, Pacific Palisades, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A folding circuit includes a differential resistance ladder and a plurality of comparators coupled to the differential resistance ladder in a manner which substantially reduces capacitive loading on the differential ladder. In addition, the folding circuit has a minimum number of output resistors to facilitate resistor matching for precision outputs. In another aspect of the invention, the folding circuit has a replica gain matching circuit which includes a replica comparator of predetermined size, which is coupled to a replica differential ladder at a predetermined location so as to replicate the currents drawn by the comparators coupled to the main differential resistance ladder for precise gain matching.