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. 18, 1990
Filed:
Oct. 18, 1988
Hirohisa Yamaguchi, Tokyo, JP;
Akira Mashimo, Tokorozawa, JP;
Teac Corporation, , JP;
Abstract
A distortion eliminating circuit for eliminating a harmonic distortion from an input frequency modulated luminance signal comprises a comparator for producing a series of output pulses responsive to the input frequency modulated luminance signal by comparing the level of the frequency modulated luminance signal with a predetermined level, a filtering circuit for extracting a d.c. component from the series of output pulses by filtering out oscillating components from said output pulses, a detecting circuit for extracting a d.c. distortion component corresponding to the harmonic distortion in the input frequency modulated luminance signal by comparing the level of the d.c. component by a reference level, and a level adjusting circuit for adjusting the level of the input frequency modulated luminance signal by adding or subtracting the d.c. distortion component to the input frequency modulated luminance signal and for supplying the input frequency modulated luminance signal having a level now thus adjusted to the comparator.