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:
Aug. 04, 1987
Filed:
Apr. 15, 1986
Shoichi Sugihara, Nagaokakyo, JP;
Sumio Katoh, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention relates to a feedback comb-type filter used for improving the S/N ratio of video signals and so constructed as to delay the output of a coefficient multiplier and to get a feedback delay signal contrary to the conventional one which gives to the coefficient multiplier the filter output, that is, the signal to be output to the exterior, thereby enabling to improve the S/N ratio only by varying the coefficient of the coefficient multiplier, also constructed to be able to cut off the feedback delay signal to suppress generation of pseudo signal and use one low pass filter for both the delay circuit and the limit of horizontal frequency band to reduce the components in number, thereby expecting improvements in accuracy and reliability.