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:
May. 02, 2006
Filed:
Jan. 21, 2005
Applicant:
Yafei BI, Fremont, CA (US);
Inventor:
Yafei Bi, Fremont, CA (US);
Assignee:
Cypress Semiconductor Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
An automatic transistor threshold measuring circuit () can include a current source circuit () that can provide increasing amounts of current to a measured transistor (N) according to current setting values (I). When a gate-to-source voltage of measured transistor (N) essentially equals a first reference voltage (Vref), the current setting values (I) is stored. The process is repeated with a second reference voltage (Vref) to acquire a second current setting value (I) A threshold voltage for the measured transistor (N) can be calculated according to the reference voltages (Vrefand Vref) and stored current setting values (I).