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:
Dec. 29, 2009
Filed:
May. 27, 2005
Tsuyoshi Higuchi, Kawasaki, JP;
Jun Funakoshi, Kawasaki, JP;
Seiji Yamagata, Kawasaki, JP;
Toshitaka Mizuguchi, Kawasaki, JP;
Katsuyoshi Yamamoto, Kawasaki, JP;
Tsuyoshi Higuchi, Kawasaki, JP;
Jun Funakoshi, Kawasaki, JP;
Seiji Yamagata, Kawasaki, JP;
Toshitaka Mizuguchi, Kawasaki, JP;
Katsuyoshi Yamamoto, Kawasaki, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
A differential amplifier has a first input terminal to which a voltage of a noise signal of the solid-state imaging device is supplied and a second input terminal to which a voltage of a temporary data signal having the noise signal of the solid-state imaging device superposed thereon is supplied. The differential amplifier inverts an output signal when a magnitude relationship in voltage between the first and second input terminals becomes reverse. A measurement circuit measures a variation amount of a voltage of the second input terminal from when the voltage of the second input terminal begins to vary in a direction to reverse the magnitude relationship to when the output signal of the differential amplifier is inverted, and outputs a measurement result as a digital value indicating a voltage of a real data signal obtained by removing the noise signal from the temporary data signal.