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:
Apr. 06, 1993
Filed:
Apr. 10, 1990
Applicant:
Inventors:
Etsuya Takeda, Suita, JP;
Yutaka Nanno, Amagasaki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 91 ; 361 56 ; 361111 ;
Abstract
An electrostatic breakdown protection circuit protects an internal circuit from positive and negative high voltages. One form of the protection circuit includes a hot line connected to the internal circuit for supplying a data signal, a bypass line, a first diode connected in a first direction between the hot line and the bypass line, and a second diode connected in a second direction between the hot line and the bypass line in parallel to the first diode.