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. 09, 1976
Filed:
Nov. 21, 1975
Hiroto Kawagoe, Kodaira, JA;
Haruo Keida, Kodaira, JA;
Hitachi, Ltd., , JA;
Abstract
A switching circuit for use as, e.g., a digitron driver circuit in an electronic desk top calculator, comprises a driving MISFET whose source terminal is connected to a ground reference potential, at least one protective MISFET whose source terminal is connected to a drain terminal of the driving MISFET, and a bias power source which is connected through a load to a drain terminal of the protective MISFET. A d.c. voltage is applied to a gate terminal of the protective MISFET and an output signal is derived from the drain terminal of the protective MISFET on the basis of an input signal which is supplied to a gate terminal of the driving MISFET. The driving MISFET is an enhancement mode transistor, while the protective MISFET is a depletion mode transistor, whereby the withstand voltage of the switching circuit is enhanced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile