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:
Jul. 15, 1986
Filed:
Oct. 27, 1983
Shuji Kizu, Yokohama, JP;
Tsuyoshi Ishida, Yokohama, JP;
Kenichi Hiramatsu, Kawasaki, JP;
Junji Miura, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
Analog switches are connected between corresponding photodiodes and a common output line. The analog switches are sequentially scanned in response to scanning pulses. During the ON period of each scanning pulse, the corresponding analog switch is turned on twice. A first circuit produces a first signal, including an image signal component and a noise signal component, when the analog switch is turned on for the first time, and produces a second signal including only the noise signal component, when the analog switch is turned on for the second time. A second circuit produces the signal derived from the difference between the first and second signals, i.e., the image signal.