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. 13, 1996
Filed:
Dec. 13, 1993
Applicant:
Inventors:
Hans W Klein, Pleasanton, CA (US);
Sriram Narayan, Pleasanton, CA (US);
Assignee:
I M P, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369124 ; 369 59 ; 369 60 ; 327 58 ;
Abstract
A circuit for detecting when peaks occur in an amplitude modulated electrical signal, and for measuring in real time the amplitudes of the detected peaks. The circuit delays the input signal a short time, and then notes when the input signal and its delayed version have the same amplitude, thereby to detect when a peak has occurred. The amplitude of the peak is then measured. This circuit and technique have particular advantages when used as part of a servo control system that positions a read/write head to accurately follow moving tracks of recorded data on magnetic tape, magnetic disks, optical disks, and the like.