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:
Jan. 05, 1993
Filed:
Jan. 10, 1992
Applicant:
Inventors:
Keith M Wellnitz, Tempe, AZ (US);
Randall T Wollschlager, Chandler, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307290 ; 307359 ;
Abstract
A single ended input comparator circuit having an input inverter stage and a voltage reference circuit is provided. The voltage reference circuit modulates the voltage appearing across the inverter stage thereby varying the switching threshold voltage level of the inverter stage and providing hysteresis for the comparator circuit. Further, by appropriately choosing the widths and lengths of the transistors used in the inverter stage and the voltage reference circuit, a zero temperature coefficient for the comparator circuit is achieved.