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. 26, 1989
Filed:
Aug. 22, 1988
Applicant:
Inventors:
Assignees:
Pioneer Electronic Corporation, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 65 ; 360 46 ;
Abstract
In a waveform equalization circuit, a digital signal is applied through a first network having a transfer function defined by four angular frequencies to one of the inversion and non-inversion input terminals of an amplifier and through a second network having a transfer function made up of a constant to the other input terminal, so that the digital signal subjected to waveform equalization is provided at the output terminal, whereby according to the transfer characteristic of the recording or reproducing system, the most suitable waveform equalization characteristic can be obtained with ease.