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:
Oct. 16, 1984
Filed:
Apr. 12, 1982
James K Berger, Malibu, CA (US);
Pioneer Magnetics, Inc., Santa Monica, CA (US);
Abstract
A system is provided for aligning the read/write magnetic heads in a multi-head disc drive which includes a four quadrant balanced circuit and which responds to the peak amplitudes of dibits recorded in servo tracks on the discs of a prerecorded servo disc pack as read by the various heads to produce, without offset errors, digital signals representative of individual head misalignments; the system being insensitive to distortions of waveform. The system can also be used to provide an analog position signal to a feedback servo mechanism for positioning the head, or heads, which is insensitive to waveform distortions and to baseline shift due to write recovery.