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:
Jan. 24, 2006
Filed:
Mar. 16, 2004
Applicant:
Nobutaka Kitagawa, Machida, JP;
Inventor:
Nobutaka Kitagawa, Machida, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/20 (2006.01); H02H 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device having a protection circuit comprising an NPN type bipolar transistor having a collector and an emitter connected between an external connection terminal of the semiconductor device to be protected and a reference terminal, a PMOS transistor having a drain and source connected between the base and the collector of the NPN type bipolar transistor and configured to supply a base current to the base of the NPN type bipolar transistor, and a control circuit configured to supply the control signal to the gate of the PMOS transistor in response to a voltage emerging on the external connection terminal.