JPS5488102A - Automatic changeover device of running speeds of recording media - Google Patents
Automatic changeover device of running speeds of recording mediaInfo
- Publication number
- JPS5488102A JPS5488102A JP15710377A JP15710377A JPS5488102A JP S5488102 A JPS5488102 A JP S5488102A JP 15710377 A JP15710377 A JP 15710377A JP 15710377 A JP15710377 A JP 15710377A JP S5488102 A JPS5488102 A JP S5488102A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- recording media
- reproduced
- input terminal
- tape
- 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
Abstract
PURPOSE: To control running speeds of recording media by providing a pulse forming circuit which forms pulses of a specified width from the input pulses reproduced at the frequency corresponding to the running speeds of the recording media.
CONSTITUTION: At the reproducing of a VTR, a control pulse (a) is reproduced from a magnetic tape and comes to the VTR. This control pulse (a) is applied to an integrating circuit 3 constituting a monostable multivibrator 2 and is converted to the pulse (b) having a fixed pulse width B. After this pulse (b) has been converted to a DC voltage, it is applied to the inversion input terminal of an operational amplifier 6 constituting a level comparator 5 and the non-inversion input terminal of an operational amplifier 7, respectively. When the tape having been high-density recorded at a slow tape running speed is reproduced at the tape running speed faster, e.g., 3 times than that at the recording, the output DC level of the integrating circuit 4 becomes lower as compared to that when the control pulse (a) of 30Hz has arrived at the input terminal 1.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15710377A JPS5488102A (en) | 1977-12-26 | 1977-12-26 | Automatic changeover device of running speeds of recording media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15710377A JPS5488102A (en) | 1977-12-26 | 1977-12-26 | Automatic changeover device of running speeds of recording media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5488102A true JPS5488102A (en) | 1979-07-13 |
Family
ID=15642291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15710377A Pending JPS5488102A (en) | 1977-12-26 | 1977-12-26 | Automatic changeover device of running speeds of recording media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5488102A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5694537A (en) * | 1979-12-27 | 1981-07-31 | Sharp Corp | Automatic change-over device of playback speed for magnetic recording and reproducing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518908A (en) * | 1974-07-10 | 1976-01-24 | Mitsubishi Electric Corp | KIROKUBAITAINOOKURISOKUDOKIRIKAESOCHI |
| JPS5163608A (en) * | 1974-11-29 | 1976-06-02 | Matsushita Electric Ind Co Ltd |
-
1977
- 1977-12-26 JP JP15710377A patent/JPS5488102A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518908A (en) * | 1974-07-10 | 1976-01-24 | Mitsubishi Electric Corp | KIROKUBAITAINOOKURISOKUDOKIRIKAESOCHI |
| JPS5163608A (en) * | 1974-11-29 | 1976-06-02 | Matsushita Electric Ind Co Ltd |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5694537A (en) * | 1979-12-27 | 1981-07-31 | Sharp Corp | Automatic change-over device of playback speed for magnetic recording and reproducing device |
| JPS6211416B2 (en) * | 1979-12-27 | 1987-03-12 | Sharp Kk |
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