JPS57100649A - Controller for running speed of magnetic tape - Google Patents
Controller for running speed of magnetic tapeInfo
- Publication number
- JPS57100649A JPS57100649A JP55176392A JP17639280A JPS57100649A JP S57100649 A JPS57100649 A JP S57100649A JP 55176392 A JP55176392 A JP 55176392A JP 17639280 A JP17639280 A JP 17639280A JP S57100649 A JPS57100649 A JP S57100649A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- magnetic tape
- clock
- running speed
- reference clock
- 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
- 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
- G11B15/44—Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
- G11B15/442—Control thereof
Landscapes
- Control Of Velocity Or Acceleration (AREA)
Abstract
PURPOSE:To obtain an optional tape speed without time delay, by shifting the offset level of a DC amplifier, which amplifies a phase error voltage between a reference clock and a reproduced clock, by using a D/A converter. CONSTITUTION:The phase of a reference clock from an input terminal 1 and that of a reproduced clock from a clock detection part 6 are compared with each other by a phase comparator 2, and the resulting phase error voltage is amplified by a DC amplifier 8. A DC motor 10 is driven by its output to control a run of a magnetic tape. Then, the offset level of the DC amplifier 8 is shifted by a D/A converter 13. For this purpose, when the frequency of the reference clock is varied in order to vary the running speed of the magnetic tape, the DC amplifier 8 generates a corresponding output voltage instantaneously, setting an optional tape speed without time delay.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55176392A JPS57100649A (en) | 1980-12-12 | 1980-12-12 | Controller for running speed of magnetic tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55176392A JPS57100649A (en) | 1980-12-12 | 1980-12-12 | Controller for running speed of magnetic tape |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57100649A true JPS57100649A (en) | 1982-06-22 |
Family
ID=16012847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55176392A Pending JPS57100649A (en) | 1980-12-12 | 1980-12-12 | Controller for running speed of magnetic tape |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57100649A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8505404B2 (en) | 2007-04-17 | 2013-08-13 | Ntn Corporation | Switching device for switching driving force between forward and reverse directions |
US9086103B2 (en) | 2009-03-16 | 2015-07-21 | Ntn Corporation | Rotation transmission device |
-
1980
- 1980-12-12 JP JP55176392A patent/JPS57100649A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8505404B2 (en) | 2007-04-17 | 2013-08-13 | Ntn Corporation | Switching device for switching driving force between forward and reverse directions |
US9086103B2 (en) | 2009-03-16 | 2015-07-21 | Ntn Corporation | Rotation transmission device |
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