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:
Feb. 18, 1997
Filed:
Aug. 07, 1995
Noah M Price, Campbell, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
A relatively inexpensive static random access memory is utilized to store persistent data in a computer. To provide the SRAM with this capability, it is connected to a source of power within the computer that includes a battery. The source of power is connected to the SRAM in a manner such that the SRAM is in an enabled state whenever any power is available to it, from either a battery or a power supply connected to a regulated voltage source. When the computer is turned off, to prevent devices connected to the SRAM from draining current being provided by the battery, a chip select terminal of the SRAM is isolated from other circuits on the computer, to prevent leakage.