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:
Aug. 29, 1995
Filed:
Oct. 22, 1992
Geoffrey E Brehmer, Austin, TX (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An improved comparator circuit is provided for comparing two input signals and producing a resulting digital output. The comparator circuit uses a single cascode devices and current mirror circuit parallel coupled to two differential amplifier stages. One differential amplifier stage receives differential input signals and the other differential amplifier stage receives a variable reference voltage and a feedback voltage from the output of the comparator. The reference voltage is varied according to user requirements. The reference voltage can be varied to any voltage within the range of the input signals placed on the differential amplifier stage. Hysteresis differential voltage on the input differential amplifier stage can be accurately controlled by varying the biasing current and reference voltage placed on the hysteresis differential amplifier stage.