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:
Feb. 27, 1990
Filed:
Aug. 05, 1988
Applicant:
Inventor:
Axel Schulz, Bickenbach, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 46 ;
Abstract
A distorted signal available at the output of a preamplifier which are derived from a magnetically recorded digital signal is differentiated twice. The second derivative signal obtained by that double differentiation is used to derive one set of pulses corresponding to both positive and negative peaks of the twice differented signal, which are then used to clock a D-flipflop. Another set of pulses is derived from the double differentiated signal responding to peaks of only one polarity thereof and these are applied to the D input of the flipflop. The output of the flipflop is a reconstituted replica of the digital signal that was originally recorded.