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. 02, 1982
Filed:
Nov. 26, 1980
Applicant:
Inventor:
Mitsuo Higuchi, Tokyo, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
331 66 ; 331111 ;
Abstract
An oscillation circuit for providing oscillation frequencies which vary in response to the intensity of incident light rays. The circuit comprises a capacitance for storing charges and a charging circuit; said stored charges being decreased in response to an increase in the intensity of light rays incident on the capacitance; the charging circuit connected to the output of the oscillation circuit; the charging circuit being adapted to charge the capacitance. The oscillation circuit, when adapted to a bootstrap circuit in an EPROM erasable by means of ultraviolet rays, improves the write-in efficiency thereof.