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:
Jul. 11, 2000
Filed:
Jul. 21, 1998
Daniel D Alexander, Gilbert, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A switched capacitor differential comparator (10) for receiving input signals which includes hysteresis circuitry (40, and 42) and a switch (43) responsive to timed clocking pulses occurring during alternating reset and comparison periods for application of a hysteresis current during a reset period of the differential comparator which current is injected into an applicable one of a pair of load devices (22, 24) to produce a hysteresis voltage offset at a selected one of the differential inputs (30, 32) which is stored during the reset period but removed during the next comparison period so that the hysteresis voltage is not canceled but remains superimposed on the stored input signals during the next comparison period to introduce hysteresis to influence the current output decision of the comparator circuit based on the decision of the comparator resulting from the previous comparison period.