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. 26, 1977
Filed:
Dec. 23, 1975
Applicant:
Inventors:
Saburo Numata, Urawa, JA;
Shinichiro Fujino, Urawa, JA;
Assignee:
Fuji Photo Optical Co., Ltd., Omiya, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06G / ; H03K / ; G06G / ;
U.S. Cl.
CPC ...
307229 ; 235183 ; 328127 ;
Abstract
In an integration circuit including an operational amplifier wherein an integrating capacitor and a switch are connected in series across the operational amplifier as a negative feedback circuit, a positive feedback resistor is connected between the connecting point between the integrating capacitor and the switch and the reference input terminal of the operational amplifier. The potential difference across the integrating capacitor is made zero in order to remove the influence of the leakage current of the switch when the switch is in its OFF-state.