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:
Sep. 22, 1981
Filed:
Nov. 20, 1979
Mitsuo Higuchi, Tokyo, JP;
Kiyoshi Miyasaka, Yokohama, JP;
Fujitsu Limited, , JP;
Abstract
A semiconductor device for use in a bootstrap circuit comprising: first and second MIS field effect transistors connected in series between a power supply line and ground; third and fourth MIS field effect transistors connected in series between the power supply line and ground; a capacitor connected between the gate and source of the third MIS field effect transistor, and; a fifth MIS field effect transistor connected between first and second nodes, the first node connecting the first and second MIS field effect transistors, and the gate of the third MIS transistor, the second node connecting the third and fourth MIS field effect transistors being connected to an output of the device, wherein a p-n junction portion which is connected to the capacitor is protected by a cover for preventing light from penetrating thereinto.