JPS5534304A - Magnetic disc reproducing method - Google Patents
Magnetic disc reproducing methodInfo
- Publication number
- JPS5534304A JPS5534304A JP10548178A JP10548178A JPS5534304A JP S5534304 A JPS5534304 A JP S5534304A JP 10548178 A JP10548178 A JP 10548178A JP 10548178 A JP10548178 A JP 10548178A JP S5534304 A JPS5534304 A JP S5534304A
- Authority
- JP
- Japan
- Prior art keywords
- wave shape
- partial response
- reliablility
- inputted
- amplifier
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/035—Equalising
Landscapes
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE:To variably control the characteristics of wave shape equalizing filter in accordance with the positional information of the magnetic head, thereby enhance the reliablility of the double adjustment of the partial response system. CONSTITUTION:The isolated reproducing wave signal from the reproducing head is inputted through the delay line 31 and the track position signal C1 from the servo head is inputted. By these signals, interest of the respective amplifiers of the amplifier 34 is controlled, and the automatic equalizing control is carried out in such a manner that the amplitude characteristic is equalized every bit cell time. The respective outputs of the amplifier 34 is next inpressed into the adder 35 to obtain the correct partial response wave shape. Thus, since the characteristic property of the wave shape equalizing filter is most referably set in accordance with the track positional information, the precise partial response wave shape can be obtained inrrespective of the inner periphery or the outer periphery of the disc, the error in equalization influence is eliminated and the reliablility of the double adjustment can be enhanced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10548178A JPS5534304A (en) | 1978-08-31 | 1978-08-31 | Magnetic disc reproducing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10548178A JPS5534304A (en) | 1978-08-31 | 1978-08-31 | Magnetic disc reproducing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5534304A true JPS5534304A (en) | 1980-03-10 |
Family
ID=14408770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10548178A Pending JPS5534304A (en) | 1978-08-31 | 1978-08-31 | Magnetic disc reproducing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5534304A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182114A (en) * | 1982-04-16 | 1983-10-25 | Hitachi Ltd | Waveform equalizing circuit |
JPS59167811A (en) * | 1983-03-14 | 1984-09-21 | Nec Corp | Magnetic disk device |
JPS59203208A (en) * | 1983-04-30 | 1984-11-17 | Matsushita Electric Ind Co Ltd | Magnetic reproducing device |
JPS6070552A (en) * | 1983-09-27 | 1985-04-22 | Trio Kenwood Corp | Magnetic recording and reproducing system |
JPH02312018A (en) * | 1989-05-29 | 1990-12-27 | Nec Corp | Optical recording and reproducing system |
US5642381A (en) * | 1993-04-26 | 1997-06-24 | Kabushiki Kaisha Toshiba | Signal equalizer |
-
1978
- 1978-08-31 JP JP10548178A patent/JPS5534304A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182114A (en) * | 1982-04-16 | 1983-10-25 | Hitachi Ltd | Waveform equalizing circuit |
JPS59167811A (en) * | 1983-03-14 | 1984-09-21 | Nec Corp | Magnetic disk device |
JPS59203208A (en) * | 1983-04-30 | 1984-11-17 | Matsushita Electric Ind Co Ltd | Magnetic reproducing device |
JPS6070552A (en) * | 1983-09-27 | 1985-04-22 | Trio Kenwood Corp | Magnetic recording and reproducing system |
JPH02312018A (en) * | 1989-05-29 | 1990-12-27 | Nec Corp | Optical recording and reproducing system |
US5642381A (en) * | 1993-04-26 | 1997-06-24 | Kabushiki Kaisha Toshiba | Signal equalizer |
US5835531A (en) * | 1993-04-26 | 1998-11-10 | Kabushiki Kaisha Toshiba | Signal equalizer |
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