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. 06, 1987
Filed:
Feb. 04, 1986
Applicant:
Inventor:
Warren J Schultz, Tempe, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 234 ; 357 28 ; 357 38 ; 357 43 ; 361101 ; 361103 ; 307310 ;
Abstract
An overvoltage and overtemperature protection circuit that includes an output thyristor fabricated in monolithic integrated circuit form is provided. The thyristor comprises a P-type substrate serving as an anode and diffused cathode and gate region wherein the current flows vertically, optimizing the high voltage and high current capability. A thermal limit circuit is provided for triggering the thyristor when a designated temperature is exceeded. The output thyristor will shunt the output voltage to ground whenever the predetermined voltage or temperature is exceeded.