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. 09, 2009
Filed:
Jun. 10, 2007
Applicant:
Won Kyung Kang, Seoul, KR;
Inventor:
Won Kyung Kang, Seoul, KR;
Assignee:
Hynix Semiconductor Inc., Icheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A well bias circuit in a memory device includes a well voltage supplying circuit configured to apply a high voltage to a well for erasing data in a memory cell. A well discharging circuit is configured to discharge the high voltage applied to the well in accordance with a first control signal after the data in the memory cell is erased. A well-to-ground circuit is configured to control the well bias to obtain a ground voltage in accordance with a second control signal. A control circuit is configured to activate the well discharging circuit for a predetermined time when power is turned on.