GB2017352A - Transducing head servo system - Google Patents
Transducing head servo systemInfo
- Publication number
- GB2017352A GB2017352A GB7909590A GB7909590A GB2017352A GB 2017352 A GB2017352 A GB 2017352A GB 7909590 A GB7909590 A GB 7909590A GB 7909590 A GB7909590 A GB 7909590A GB 2017352 A GB2017352 A GB 2017352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- track
- head
- signal
- envelope
- applying
- 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.)
- Granted
Links
- 230000002463 transducing effect Effects 0.000 title abstract 2
- 230000000694 effects Effects 0.000 abstract 2
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/1808—Driving of both record carrier and head
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
- G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Control Of Position Or Direction (AREA)
Abstract
In recording and reproducing apparatus of the type which utilizes transverse positioning of the transducing head assembly to accurately follow a track during reproducing and, at the completion of the track, to position the head to either play the next adjacent successive track, replay the same track or play another track so that the appropriate special motion effect is achieved, tracking is maintained by applying a small oscillatory motion to the head to cause it to vibrate laterally of the track, examining the resulting modulation of the reproduced signal's envelope to generate a tracking error correction signal and applying this to the head assembly. A reference signal employed in the generation of the error correction signal is automatically phase synchronized in response to the head vibrations to correct errors introduced to the error signal as a result of phase changes introduced to the modulation of the reproduced signal's envelope by effects other than mistracking by the head. The speed of a tape capstan is retroactively controlled. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88999478A | 1978-03-23 | 1978-03-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2017352A true GB2017352A (en) | 1979-10-03 |
GB2017352B GB2017352B (en) | 1982-08-25 |
Family
ID=25396083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7909590A Expired GB2017352B (en) | 1978-03-23 | 1979-03-19 | Transducing head servo system |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS54163618A (en) |
AT (1) | AT381823B (en) |
BE (1) | BE875025A (en) |
CA (1) | CA1147456A (en) |
DE (1) | DE2911122A1 (en) |
FR (1) | FR2420816B1 (en) |
GB (1) | GB2017352B (en) |
HK (1) | HK6887A (en) |
IT (1) | IT1115051B (en) |
NL (1) | NL181311C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2482398A1 (en) * | 1980-03-13 | 1981-11-13 | Sony Corp | HELICOIDAL SCANNING MAGNETOSCOPE WITH AUTOMATIC HEAD TRACING |
FR2500700A1 (en) * | 1981-02-24 | 1982-08-27 | Sony Corp | METHOD AND DEVICE FOR CONTROLLING THE MOVEMENT OF A RECORDING MEDIUM |
EP0090666A1 (en) * | 1982-03-30 | 1983-10-05 | Sony Corporation | Information signal reproducing devices |
EP0091190A1 (en) * | 1982-04-02 | 1983-10-12 | Ampex Corporation | A programmable nonlinear speed control for a recording and/or reproducing apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4481544A (en) * | 1981-09-18 | 1984-11-06 | Ampex Corporation | Automatic tracking system with apparatus to prevent mistracking by a limited range transducer during stop motion |
JPS6087422A (en) * | 1983-09-19 | 1985-05-17 | アムペックス コーポレーション | Automatic head position tracking servo system |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2260163B1 (en) * | 1974-02-04 | 1979-08-03 | Thomson Brandt | |
DE2423074C2 (en) * | 1974-05-13 | 1983-09-22 | Robert Bosch Gmbh, 7000 Stuttgart | Device for tracking a light beam scanning head |
US4080636A (en) * | 1976-03-19 | 1978-03-21 | Ampex Corporation | System for damping vibrations in a deflectable transducer |
US4093885A (en) * | 1976-03-19 | 1978-06-06 | Ampex Corporation | Transducer assembly vibration sensor |
US4106065A (en) * | 1976-03-19 | 1978-08-08 | Ampex Corporation | Drive circuitry for controlling movable video head |
IT1073210B (en) * | 1976-03-19 | 1985-04-13 | Ampex Corp Soc | SYSTEM FOR PRODUCING SPECIAL MOVEMENT EFFECTS IN VIDEO RECORDING AND PLAYBACK DEVICES |
US4151570A (en) * | 1976-03-22 | 1979-04-24 | Ampex Corporation | Automatic scan tracking using a magnetic head supported by a piezoelectric bender element |
US4099211A (en) * | 1976-09-13 | 1978-07-04 | Ampex Corporation | Positionable transducing mounting structure and driving system therefor |
GB1580008A (en) * | 1977-06-04 | 1980-11-26 | Sony Corp | Automatic head tracking system |
JPS5492307A (en) * | 1977-12-29 | 1979-07-21 | Sony Corp | Driving circuit of electrostrictive converter |
JPS54113308A (en) * | 1978-02-23 | 1979-09-04 | Sony Corp | Tracking device for magnetic head |
-
1979
- 1979-01-24 CA CA000320228A patent/CA1147456A/en not_active Expired
- 1979-03-19 GB GB7909590A patent/GB2017352B/en not_active Expired
- 1979-03-21 DE DE19792911122 patent/DE2911122A1/en active Granted
- 1979-03-21 IT IT48427/79A patent/IT1115051B/en active
- 1979-03-22 NL NLAANVRAGE7902274,A patent/NL181311C/en not_active IP Right Cessation
- 1979-03-22 FR FR7907283A patent/FR2420816B1/en not_active Expired
- 1979-03-22 BE BE0/194158A patent/BE875025A/en not_active IP Right Cessation
- 1979-03-23 AT AT0217279A patent/AT381823B/en not_active IP Right Cessation
- 1979-03-23 JP JP3420679A patent/JPS54163618A/en active Pending
-
1987
- 1987-01-15 HK HK68/87A patent/HK6887A/en unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2482398A1 (en) * | 1980-03-13 | 1981-11-13 | Sony Corp | HELICOIDAL SCANNING MAGNETOSCOPE WITH AUTOMATIC HEAD TRACING |
US4549234A (en) * | 1981-02-04 | 1985-10-22 | Sony Corporation | Method and apparatus for tracking control |
FR2500700A1 (en) * | 1981-02-24 | 1982-08-27 | Sony Corp | METHOD AND DEVICE FOR CONTROLLING THE MOVEMENT OF A RECORDING MEDIUM |
EP0090666A1 (en) * | 1982-03-30 | 1983-10-05 | Sony Corporation | Information signal reproducing devices |
US4550349A (en) * | 1982-03-30 | 1985-10-29 | Sony Corporation | Playback speed controller for video tape recorder |
EP0091190A1 (en) * | 1982-04-02 | 1983-10-12 | Ampex Corporation | A programmable nonlinear speed control for a recording and/or reproducing apparatus |
Also Published As
Publication number | Publication date |
---|---|
AT381823B (en) | 1986-12-10 |
JPS54163618A (en) | 1979-12-26 |
FR2420816B1 (en) | 1988-07-29 |
DE2911122C2 (en) | 1987-07-02 |
NL181311B (en) | 1987-02-16 |
HK6887A (en) | 1987-01-23 |
CA1147456A (en) | 1983-05-31 |
GB2017352B (en) | 1982-08-25 |
FR2420816A1 (en) | 1979-10-19 |
BE875025A (en) | 1979-07-16 |
NL181311C (en) | 1987-07-16 |
IT7948427A0 (en) | 1979-03-21 |
IT1115051B (en) | 1986-02-03 |
DE2911122A1 (en) | 1979-09-27 |
ATA217279A (en) | 1986-04-15 |
NL7902274A (en) | 1979-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950319 |