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. 26, 2000
Filed:
May. 14, 1999
Applicant:
Inventor:
Volker Hecht, Los Altos, CA (US);
Assignee:
GateField Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518529 ; 36518518 ; 326 39 ;
Abstract
In an FPGA, nonvolatile reprogrammable interconnect cells which have a switch transistor and at least one second transistor for programming and sensing, or a second transistor for sensing and a buried N+ region for programming the cell, use a high voltage on the common control gate for the cell erasing operation. The source/drains of the switch transistor are grounded. By placing an intermediate voltage on the source/drains of the second transistor, erase times can be reduced and test costs can be significantly lowered.