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:
Oct. 22, 1991
Filed:
Mar. 16, 1990
Applicant:
Inventor:
Masashi Itoh, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
3074821 ; 3073031 ; 307446 ; 307456 ; 307270 ; 357 48 ; 357 51 ; 361212 ; 361 91 ;
Abstract
A buffer circuit comprises an interface node, a bipolar transistor having a collector connected to a first power source, an emitter connected to a second power source, and a base, for transferring a signal supplied to and from the interface node, and a diode structure formed between the emitter and base of the bipolar transistor, the diode structure containing a PN junction reversely coupled across the emitter-base junction of the bipolar transistor.