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:
Nov. 24, 1998
Filed:
Dec. 05, 1995
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361111 ; 361 56 ; 361118 ; 361119 ;
Abstract
To an input terminal is connected one end of the source-to-drain current path of an NMOS the gate of which is connected to Vcc. The other end of the current path of the NMOS is connected by a protection circuit comprised of a PMOS and an NMOS to the common gates of a PMOS and an NMOS in the input stage of an internal circuit. In the protection circuit, the PMOS has its source and gate connected to Vcc and its drain connected to the common gates of the PMOS and the NMOS, while the NMOS has its source and gate connected to Vss and its drain connected to the common drains of the PMOS and the NMOS.