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:
Jun. 06, 1995
Filed:
Apr. 26, 1994
Applicant:
Inventors:
Tim M Coffman, Sugarland, TX (US);
Sung-Wei Lin, Houston, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ; G05F / ;
U.S. Cl.
CPC ...
327537 ; 327536 ; 36518909 ; 363 59 ;
Abstract
A system for erasing a memory array in a memory has a supply voltage and a negative charge pump. The negative charge pump system includes (a) circuitry to select a memory array to be erased; (b) for circuitry to switch on the supply voltage Vnn for the charge pump; (c) circuitry to pump the supply voltage Vnn with the charge pump to produce a pumped negative voltage; (d) circuitry to erase the selected array with the pumped negative voltage; (e) circuitry to provide the pumping; and (f) circuitry to provide a discharge path for voltages trapped in the charge pump.