Title:
COMPUTER DISK DRIVE INTEGRATED DATA PATH CIRCUIT OPTIMIZED FOR HANDLING BOTH DATA AND SERVO SIGNALS
Document Type and Number:
WIPO Patent Application WO1993019466
Kind Code:
A3
Abstract:
An integrated circuit adapted for use in a data path of a disk storage system of a type wherein data is recorded at different rates depending upon the storage track of the data and includes servo bursts of head positioning signals disbursed throughout the data on all of the tracks. The circuit includes a variable cut off low pass filter that is adjusted both for the rate of data being read and for the rate of the servo bursts when being read. An automatic gain control and a pulse detector are similarly dynamically adjusted in characteristics to fit that of the data and servo bursts when each is being read from the disk. An output of the filter provides both read data and head positioning signals. A write data path is also provided as part of the circuit.
Inventors:
PETERSEN COREY D (US)
Application Number:
PCT/US1993/002553
Publication Date:
November 11, 1993
Filing Date:
March 16, 1993
Export Citation:
Assignee:
INT MICROELECTRONIC PRODUCTS (US)
International Classes:
G11B20/10; H03G3/20; H03K5/08; (IPC1-7): G11B20/10; H03G3/20
Foreign References:
| EP0255036A2 | 1988-02-03 |
Other References:
GOODENOUGH F.: "VOLTAGE-TUNABLE LINEAR FILTERS MOVE ONTO A CHIP.", ELECTRONIC DESIGN., PENTON MEDIA, CLEVELAND, OH., US, vol. 38., no. 03., 8 February 1990 (1990-02-08), US, pages 43/44 + 46 + 53/54., XP000100421, ISSN: 0013-4872
ELECTRONIC DESIGN vol. 33, no. 18, August 1985, HASBROUCK HEIGHTS, NEW JERSEY, US pages 121 - 128 D.T. WILE AND J.B. CECIL 'Pulse detector chip keeps hard-disk drives virtually error-free'
PATENT ABSTRACTS OF JAPAN vol. 13, no. 209 (P-871)17 May 1989
IBM TECHNICAL DISCLOSURE BULLETIN vol. 29, no. 3, August 1986, NEW YORK, US pages 1231 - 1232 IBM 'Switchable time-domain filter'
PATENT ABSTRACTS OF JAPAN vol. 13, no. 508 (P-960)15 November 1989
ELECTRONIC DESIGN vol. 33, no. 18, August 1985, HASBROUCK HEIGHTS, NEW JERSEY, US pages 121 - 128 D.T. WILE AND J.B. CECIL 'Pulse detector chip keeps hard-disk drives virtually error-free'
PATENT ABSTRACTS OF JAPAN vol. 13, no. 209 (P-871)17 May 1989
IBM TECHNICAL DISCLOSURE BULLETIN vol. 29, no. 3, August 1986, NEW YORK, US pages 1231 - 1232 IBM 'Switchable time-domain filter'
PATENT ABSTRACTS OF JAPAN vol. 13, no. 508 (P-960)15 November 1989
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