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:
Jan. 24, 2006
Filed:
Apr. 25, 2002
Junichi Saito, Miyagi-ken, JP;
Junichi Saito, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An analog Y signal input from an input terminalis clamped at a pedestal level in a clamp circuit, and then, is converted to a digital image signal in a quantization circuit. The pedestal level Dp of the digital output D(t)is stored in a register. A predetermined value Dref (Dref=0 for the Y signal) is subtracted from Dp in a subtracter. The subtraction outputis subtracted from the digital outputin a subtracter. The subtraction output(D(t)−(Dp−Dref)) is a signal for which a shift caused by a variation in the precision of the clamp circuitand the quantization circuithas been compensated for. The subtraction outputis limited to a predetermined dynamic range by an overflow limiter circuit, and output as Dout.