JPS573247A - Magnetic reproducer - Google Patents
Magnetic reproducerInfo
- Publication number
- JPS573247A JPS573247A JP7533080A JP7533080A JPS573247A JP S573247 A JPS573247 A JP S573247A JP 7533080 A JP7533080 A JP 7533080A JP 7533080 A JP7533080 A JP 7533080A JP S573247 A JPS573247 A JP S573247A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- control signal
- tape
- signal
- phase
- 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
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
- G11B15/46—Controlling, regulating, or indicating speed
- G11B15/52—Controlling, regulating, or indicating speed by using signals recorded on, or derived from, record carrier
Abstract
PURPOSE:To keep the running speed of a tape constant, by setting the gain of the speed control loop of a motor. CONSTITUTION:Information on a tape speed is obtained by reproducing a control signal, recorded on a tape 3, by a head 9 and then supplied to a frequency dividing circuit 30. The oscillation frequency (f) of a reference oscillator 31 is compared with the control signal by a phase comparator 32 to obtain a phase error signal. When playback operation is carried out with the tape speed W times as fast as the speed in the recording of the control signal, the reproduced control signal increases frequency accordingly. Then, the phase error signal is applied via a mixer 27 to a motor driving circuit 28 to form a phase control loop, and the control signal synchronizes with the signal of the oscillator 31, holding the tape speed constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7533080A JPS573247A (en) | 1980-06-03 | 1980-06-03 | Magnetic reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7533080A JPS573247A (en) | 1980-06-03 | 1980-06-03 | Magnetic reproducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS573247A true JPS573247A (en) | 1982-01-08 |
JPS6235174B2 JPS6235174B2 (en) | 1987-07-31 |
Family
ID=13573133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7533080A Granted JPS573247A (en) | 1980-06-03 | 1980-06-03 | Magnetic reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS573247A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4866412A (en) * | 1971-12-13 | 1973-09-12 | ||
JPS5084205A (en) * | 1973-11-24 | 1975-07-08 | ||
JPS50150410A (en) * | 1974-05-22 | 1975-12-02 | ||
JPS5174210A (en) * | 1974-12-24 | 1976-06-28 | Matsushita Electric Ind Co Ltd | |
JPS526347U (en) * | 1975-06-30 | 1977-01-17 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5188679A (en) * | 1975-01-29 | 1976-08-03 | Kanetsusatsukinho oyobi sonosochi |
-
1980
- 1980-06-03 JP JP7533080A patent/JPS573247A/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4866412A (en) * | 1971-12-13 | 1973-09-12 | ||
JPS5084205A (en) * | 1973-11-24 | 1975-07-08 | ||
JPS50150410A (en) * | 1974-05-22 | 1975-12-02 | ||
JPS5174210A (en) * | 1974-12-24 | 1976-06-28 | Matsushita Electric Ind Co Ltd | |
JPS526347U (en) * | 1975-06-30 | 1977-01-17 |
Also Published As
Publication number | Publication date |
---|---|
JPS6235174B2 (en) | 1987-07-31 |
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