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. 07, 2017
Filed:
Mar. 23, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyuki Yagi, Honjo, JP;
Toshio Kameshima, Kumagaya, JP;
Katsuro Takenaka, Honjo, JP;
Sho Sato, Tokyo, JP;
Hideyuki Okada, Honjo, JP;
Atsushi Iwashita, Saitama, JP;
Eriko Sato, Tokyo, JP;
Takuya Ryu, Kokubunji, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An imaging apparatus includes a pixel that generates charge; an integral amplifier that integrates charge transferred from the pixel; a low pass filter to which output of the integral amplifier is supplied and whose time constant is variable; first and second sample-and-hold circuits that sample and hold output of the low pass filter before and after the charge is transferred from the pixel to the integral amplifier, respectively; a differential circuit that outputs a difference between signals held by the first and second sample-and-hold circuits; and a control circuit that changes the time constant. The control circuit decreases the time constant after the sampling by the first sample-and-hold circuit ends, and increases the time constant in the middle of the sampling by the second sample-and-hold circuit.