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:
Feb. 09, 1993
Filed:
Jul. 16, 1991
Hiroshi Itagaki, Tokyo, JP;
Nobuo Matsuoka, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A color image reading apparatus includes reading circuitry for reading a color image and dot sequentially outputting a plurality of color component signals. Common amplifying circuitry is provided for sequentially amplifying the plurality of analog color component signals which are dot sequentially output from the reading circuitry. Common converting circuitry is provided for sequentially converting the plurality of color component signals, which are amplified by the common amplifying circuitry, into a plurality of digital color component signals. Separating circuitry is provided for separating the plurality of digital color component signals, which are converted by the common converting circuitry, into digital color component signals of each color. Finally, switching circuitry is provided for sequentially switching a gain of the amplifying circuitry in accordance with a color of the analog color signal to be amplified.