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. 16, 2015
Filed:
Aug. 11, 2011
Applicant:
Yasuyuki Takahashi, Atsugi, JP;
Inventor:
Yasuyuki Takahashi, Atsugi, JP;
Assignee:
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/00 (2006.01); G05F 3/30 (2006.01);
U.S. Cl.
CPC ...
G05F 3/30 (2013.01);
Abstract
Provided is a startup circuit which allows a reference voltage generating circuit to start up and reach a stable equilibrium state in an extremely short period. The startup circuit is configured to hold voltage which is substantially the same as internal voltage of the reference voltage generating circuit in the stable equilibrium state even when power is not supplied to the startup circuit. The voltage is output from the startup circuit to the reference voltage generation circuit when the reference voltage generating circuit is started.