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:
Jun. 11, 1991
Filed:
May. 13, 1985
Applicant:
Inventor:
Joseph T Bellavance, San Jose, CA (US);
Assignee:
North American Philips Corp., Sunnyvale, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H01L / ;
U.S. Cl.
CPC ...
307456 ; 307458 ; 357 15 ; 357 44 ; 357 46 ; 357 92 ;
Abstract
An ISL clamped NPN transistor and a PNP interface transistor are merged together in a single semiconductive isolation island. The two transistors are laterally separated from each other along a semiconductive surface of the island, which also includes one or more metallic elements forming individual Schottky barrier contact diodes with the semiconductive surface. The PNP transistor provides translation between an ISL logic gate and a TTL logic gate. One of the Schottky diodes may be used in combination with the NPN transistor as an active pulldown for an output transistor of the TTL logic gate.