NL7902070A - MFM INFORMATION CODING UNIT WITH WRITE COMPENSATION. - Google Patents

MFM INFORMATION CODING UNIT WITH WRITE COMPENSATION.

Info

Publication number: NL7902070A
Authority: NL; Netherlands
Prior art keywords: coding unit; information coding; write compensation; mfm information; mfm
Prior art date: 1978-03-16

Application number

NL7902070A

Other languages

Dutch (nl)

Original Assignee

Tektronix Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1978-03-16

Filing date

1979-03-15

Publication date

1979-09-18

1979-03-15 Application filed by Tektronix Inc filed Critical Tektronix Inc

1979-09-18 Publication of NL7902070A publication Critical patent/NL7902070A/en

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10194—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using predistortion during writing

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Signal Processing For Digital Recording And Reproducing (AREA)
Digital Magnetic Recording (AREA)
Compression, Expansion, Code Conversion, And Decoders (AREA)
Dc Digital Transmission (AREA)

NL7902070A 1978-03-16 1979-03-15 MFM INFORMATION CODING UNIT WITH WRITE COMPENSATION. NL7902070A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US88740378A	1978-03-16	1978-03-16

Publications (1)

Publication Number	Publication Date
NL7902070A true NL7902070A (en)	1979-09-18

Family

ID=25391063

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7902070A NL7902070A (en)	1978-03-16	1979-03-15	MFM INFORMATION CODING UNIT WITH WRITE COMPENSATION.

Country Status (6)

Country	Link
JP (1)	JPS59888B2 (en)
CA (1)	CA1172766A (en)
DE (1)	DE2909822C2 (en)
FR (1)	FR2420250A1 (en)
GB (1)	GB2016762B (en)
NL (1)	NL7902070A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4245263A (en) *	1979-05-14	1981-01-13	Honeywell Information Systems Inc.	Write precompensation and write encoding for FM and MFM recording
DE3326912A1 (en) *	1983-07-26	1985-02-07	Siemens AG, 1000 Berlin und 8000 München	Device for code conversion
US4756008A (en) *	1986-03-03	1988-07-05	Hitachi, Ltd.	Digitized quadrature phase shift keying modulator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3067422A (en) *	1958-12-24	1962-12-04	Ibm	Phase distortion correction for high density magnetic recording
US3482228A (en) *	1965-10-21	1969-12-02	Sperry Rand Corp	Write circuit for a phase modulation system
US3685033A (en) *	1970-08-24	1972-08-15	Honeywell Inc	Block encoding for magnetic recording systems
US3879342A (en) *	1973-12-28	1975-04-22	Honeywell Inf Systems	Pre-recorded digital data compensation system
US4000513A (en) *	1975-07-28	1976-12-28	Computer Peripherals, Inc.	Apparatus and method for data recording with peak shift compensation

1979
- 1979-03-02 GB GB7907381A patent/GB2016762B/en not_active Expired
- 1979-03-13 DE DE19792909822 patent/DE2909822C2/en not_active Expired
- 1979-03-14 FR FR7907080A patent/FR2420250A1/en active Granted
- 1979-03-14 CA CA000323397A patent/CA1172766A/en not_active Expired
- 1979-03-15 JP JP3054479A patent/JPS59888B2/en not_active Expired
- 1979-03-15 NL NL7902070A patent/NL7902070A/en not_active Application Discontinuation

Also Published As

Publication number	Publication date
CA1172766A (en)	1984-08-14
JPS54133019A (en)	1979-10-16
FR2420250B1 (en)	1983-08-12
JPS59888B2 (en)	1984-01-09
GB2016762A (en)	1979-09-26
DE2909822C2 (en)	1982-06-03
DE2909822A1 (en)	1979-09-20
FR2420250A1 (en)	1979-10-12
GB2016762B (en)	1982-08-25

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Legal Events

Date	Code	Title
1979-10-10	A1A	A request for search or an international-type search has been filed
1980-10-27	BB	A search report has been drawn up
1982-03-01	BC	A request for examination has been filed
1985-01-01	A85	Still pending on 85-01-01
1985-11-01	BV	The patent application has lapsed