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. 16, 1986
Filed:
Dec. 10, 1984
Anthony M Olson, Stevensville, MI (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A power transition detection and override circuit is coupled to the OUTPUT-ENABLE (OE) pin of a nonvolatile electrically erasable programmable read only memory (EEPROM) for preventing inadvertent write commands thereto from a microprocessor arising from supply voltage (V.sub.cc) transitions, including power up and power down. With the EEPROM provided with internal write protection for V.sub.cc less than approximately 3.0 VDC, the power transition detection and override circuit holds the OE pin of the EEPROM low until V.sub.cc reaches a specified operating voltage, e.g., 4.75 VDC. This masks any WRITE ENABLE (WE) line glitches by the read operation of the active low OE line.