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:
Sep. 06, 2005
Filed:
Aug. 10, 2000
Tadami Mine, Osaka, JP;
Tadami Mine, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A noise reduction circuit with high noise reduction effect and low power consumption for a high resolution charge coupled device (CCD) as well as for a usual resolution CCD is provided. A delay circuit delays an CCD output signal, and a pulse generator outputs a pulse signal having the same period that the CCD output signal has. A part of period during which the pulse signal is at a high level overlaps with a signal-level period oh the CCD output signal. A first non-additive mixing (NAM) circuit selects and output a lower level signal between the CCD output signal and the pulse signal. A second NAM circuit selects and outputs a lower level signal between the output signal from the delay circuit and the pulse signal. A difference circuit calculates difference between an output signal of the first NAM circuit and an output signal of the second NAM circuit. A delay time of the delay circuit is set so that a feedthrough-level period of an output signal of the delay circuit overlaps with a signal-level period of the CCD output signal.