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:
Apr. 28, 1981
Filed:
Jun. 30, 1978
Chakrapani G Jambotkar, Hopewell Junction, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a constant voltage threshold device for providing a substantially constant voltage across a pair of terminals. The threshold device includes a field effect device having source and drain regions formed into an isolated semiconductor region which, in turn, is formed into a substrate. The distance between the drain region of the field effect device and the substrate is directly related to the threshold voltage of the threshold device. The threshold voltage is also determined by the relative doping levels of the various semiconductor regions and the value of various fixed biasing potentials applied to the various electrodes of the threshold device.