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:
May. 07, 1991
Filed:
May. 08, 1989
Applicant:
Inventors:
Stephen W Hobrecht, Los Altos, CA (US);
Michael C Chow, San Mateo, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; G05F / ;
U.S. Cl.
CPC ...
3072967 ; 3072961 ; 3072966 ; 307310 ; 307350 ; 323313 ; 323315 ; 323907 ;
Abstract
A combined CMOS/linear circuit employs a voltage reference circuit to provide a temperature compensated V.sub.REF output. The circuit includes means for switching the reference circuit off and on in response to the signal on an enable terminal. The voltage reference circuit includes a current mirror feedback which is positive in nature to provide a controlled hysteresis action. This provides noise immunity for the enable input. A digital output indicator is included to indicate the state of the reference circuit.