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. 14, 1992
Filed:
Aug. 31, 1990
Applicant:
Inventor:
Christopher A Freymuth, Austin, TX (US);
Assignee:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
307 66 ; 307150 ;
Abstract
A power-sense circuit for use in an integrated circuit provides an indication when back-up battery power is lost when the integrated circuit main power supply was off. The power-sense circuit is fully integrated within the integrated circuit and includes a battery sensor, a main power sensor, a latch, and an output coupled to the latch which provides a power-sense signal which is at a first binary state when back-up battery power had been lost and a second binary state indicating that main power had been reinstated to the integrated circuit.