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. 30, 1990
Filed:
Jan. 10, 1989
Jan Dikken, Eindhoven, NL;
Roelof H Salters, Eindhoven, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
The invention relates to an additional transistor which is connected in cascode with a sub-circuit of a logic circuit in order to protect further transistors of the sub-circuit against hot carrier stress and hot carrier degradation. In a logic circuit having transistors of a first conductivity type, an additional transistor of the second conductivity type is arranged in cascode. This additional transistor is connected as a diode or as a current source in dependence on an output voltage of the circuit. Further aspects of the invention concern the switching means for switching the additional transistor and the location where the additional transistor is to be inserted.