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:
May. 07, 1985
Filed:
Jul. 16, 1982
Applicant:
Inventors:
Bastiaan B Eertink, Grubbenvorst, NL;
Hendrikus J van Esch, Veldhoven, NL;
Assignee:
Oce-Nederland B.V., Venlo, NL;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 307311 ;
Abstract
A light detector circuit is described in which the baseline level of the output signal of a light detector is stabilized by feeding back a control signal to an element that has a voltage variable resistance and is connected in series with the light detector across a voltage source. Several embodiments are shown. In one embodiment a differential amplifier circuit with an integrating feedback circuit is employed to establish a stabilized control voltage.