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:
Sep. 19, 1989
Filed:
Aug. 23, 1988
Applicant:
Inventor:
Jaswinder S Jandu, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307355 ; 307491 ; 307494 ; 330295 ;
Abstract
A complementary voltage comparator is described wherein a CMOS operational amplifier having an input stage comprising N-channel field effect transistors is coupled with a CMOS operational amplifier having an input stage comprising P-channel field effect transistors. The outputs of the operational amplifiers are converted to currents and combined to indicate the relative magnitudes of the voltages being compared. This configuration allows the range of input voltages to vary over the full range of supply voltages and negates the need for offset correction.