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:
Oct. 17, 2000
Filed:
Jan. 27, 1999
Richard S Griffith, Chandler, AZ (US);
Robert L Vyne, Tempe, AZ (US);
Thomas A Somerville, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A comparator circuit (10) with hysteresis having transistors with the same threshold voltage and a method for comparing input signals. The comparator circuit (10) includes a current mirror (11) coupled to a common electrode differential pair (12) and to a feedback circuit (13). The current mirror (11) has a large output impedance and provides a plurality of output currents (I.sub.21, I.sub.26, I.sub.31). Some (I.sub.21, I.sub.26) of the currents are transmitted to the common electrode differential pair and one (I.sub.31) of the currents is transmitted to the feedback circuit (13). The output currents (I.sub.21, I.sub.26, I.sub.31) are modulated to generate positive feedback signals that control changing the output state of the comparator circuit (10) as well as provide hysteresis for the comparator circuit (10).