Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1993-04-23
1995-08-01
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 7303, 360 70, G11B 1546
Patent
active
054384648
ABSTRACT:
A disk drive in a multi-disk storage system has a spindle synchronizer and a spindle controller that are microprocessor-based. The spindle synchronizer has a counter used to track the phase of a master phase reference signal that is distributed to all the disk drives in the storage system. The counter may also optionally be used to generate the master reference signal. The spindle synchronizer also has programmable registers and a comparator that are used to generate a spindle reference signal having a programmable phase offset relative to the master reference signal, and a register used to sample the phase of the master reference once per revolution of its associated spindle. The spindle controller contains a counter used to measure the actual rotational period of the associated spindle. The spindle phase error is used in a phase correction algorithm that controls a reference voltage supplied to a motor spin controller. The algorithm employs frequency switching to phase-lock the associated spindle with the spindle reference signal generated by the spindle synchronizer.
REFERENCES:
patent: 3441342 (1969-04-01), Ball et al.
patent: 3484760 (1969-12-01), Perkins et al.
patent: 3503058 (1970-03-01), Ault
patent: 3553662 (1971-01-01), Goss
patent: 3864750 (1975-02-01), Applequist
patent: 3893178 (1975-07-01), Sordello
patent: 3911488 (1975-10-01), Wood
patent: 4206485 (1980-06-01), Sakamoto
patent: 4224645 (1980-09-01), Mauch
patent: 4249220 (1981-02-01), Yasutake et al.
patent: 4259698 (1981-03-01), Takada
patent: 4278924 (1981-07-01), Mawatari et al.
patent: 4622499 (1986-11-01), Squires et al.
patent: 4658307 (1987-04-01), Tsuyuguchi et al.
patent: 4780866 (1988-10-01), Syracuse
patent: 4815063 (1989-03-01), Aoshima et al.
patent: 4855978 (1989-08-01), Kanamaru
patent: 4870643 (1989-09-01), Bultman et al.
patent: 4907105 (1990-03-01), Kurzweil, Jr.
patent: 4908810 (1990-05-01), Oie
patent: 4920462 (1990-04-01), Couse et al.
patent: 4978902 (1990-12-01), Hatagami et al.
patent: 5008763 (1991-04-01), Horino
patent: 5038232 (1991-08-01), Grace
patent: 5067033 (1991-11-01), Wakui
patent: 5079654 (1992-01-01), Uno et al.
patent: 5117315 (1992-05-01), Nagasaki et al.
patent: 5119242 (1992-06-01), Murray
patent: 5128812 (1992-07-01), Uno et al.
patent: 5159503 (1992-10-01), Mitamura et al.
patent: 5237466 (1993-08-01), Glaser et al.
patent: 5303097 (1994-04-01), Baba et al.
Pending U.S. Patent Application Serial No. 07/721,044 filed Jun. 26, 1991, inventor Even, atty. docket No. PD91-0118.
Micro Linear ML4410 data sheet, Jul. 1992.
Unitrode UC1842 etc. data sheet, Feb. 1986.
Even William F.
Lewis William D.
Harrison David B.
Kapadia Varjha A.
Psitos Aristotelis
Quantum Corporation
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