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. 08, 1988
Filed:
Oct. 05, 1987
Andrew G Dingwall, Princeton Township, Mercer County, NJ (US);
GE Company, Fairfield, CT (US);
Abstract
An impedance transforming circuit for multibit digital word signals includes plural transmission paths for respective signals of a word. At least some of the paths have different output impedances but present essentially the same signal propagation delay. Each path includes plural, tandem connected, transistor switches; and each switch comprises, with correspondingly located switches of other paths, a stage of the transforming circuit. Output conductances of the switches of a path are scaled along the path according to a stage-to-stage ration F selected to minimize the number of stages required to achieve a desired signal propagation time through the path. At any stage switch where the ratio F cannot be directly accommodated, the selected value of F is achieved by dividing the stage output conductance between an in-path switch, that satisfies that ratio F with respect to a driven stage and a dummy-load switch that, together with the in-path switch, satisfies the ratio F with respect to a prior stage switch.