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:
Dec. 19, 1989
Filed:
Jun. 29, 1988
Applicant:
Inventors:
Ting-Wah Wong, San Jose, CA (US);
Raul-Adrian Cernea, Walnut Creek, CA (US);
Assignee:
Seeq Technology, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G05F / ;
U.S. Cl.
CPC ...
365218 ; 365185 ; 36518911 ; 36518906 ; 36523006 ; 323311 ; 323316 ;
Abstract
A control circuit for erasing EEPROM memory cells is disclosed, including a charge pump having two switched constant current sources driven by opposing clocks. Current produced by the current sources is coupled to a node from where it is used to erase EEPROM memory cells. A switch is provided to isolate the device being erased by floating its source.