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:
Dec. 08, 2015
Filed:
May. 08, 2014
Applicant:
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Inventors:
Akihito Yahagi, Chiba, JP;
Takashi Imura, Chiba, JP;
Assignee:
SEIKO INSTRUMENTS INC., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/573 (2006.01); G05F 1/56 (2006.01); G05F 1/565 (2006.01); G05F 1/575 (2006.01);
U.S. Cl.
CPC ...
G05F 1/56 (2013.01); G05F 1/565 (2013.01); G05F 1/573 (2013.01); G05F 1/575 (2013.01);
Abstract
Provided is a voltage regulator capable of accurately adjusting a tail current of a differential amplifier circuit without adding a test terminal. The voltage regulator includes: a constant current circuit for causing the tail current of the differential amplifier circuit to flow; a protection circuit; a current output circuit for outputting a current of the constant current circuit to a test terminal for measuring characteristics of the protection circuit; a switch circuit for stopping a function of the protection circuit; and a fuse provided between the test terminal and the current output circuit.