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. 10, 1987
Filed:
Jul. 07, 1986
Applicant:
Inventors:
Sossio Vergara, Frattamaggiore, IT;
Sebastiano D'Arrigo, Houston, TX (US);
Giuliano Imondi, Rieti, IT;
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323274 ; 323284 ; 307358 ; 307362 ; 307363 ;
Abstract
A circuit for sensing a voltage present on an input line higher than a supply voltage V.sub.DD which includes an isolation switch coupled between the input line and an output line, a threshold adjustment diode coupled in series with the isolation switch also between the input and output lines for establishing a voltage above V.sub.DD at which the isolation switch turns on and a constant current source coupled from an output of the sensing circuit and ground.