JPS55153013A - Controller for tape speed change-over of video tape recorder - Google Patents
Controller for tape speed change-over of video tape recorderInfo
- Publication number
- JPS55153013A JPS55153013A JP6066679A JP6066679A JPS55153013A JP S55153013 A JPS55153013 A JP S55153013A JP 6066679 A JP6066679 A JP 6066679A JP 6066679 A JP6066679 A JP 6066679A JP S55153013 A JPS55153013 A JP S55153013A
- Authority
- JP
- Japan
- Prior art keywords
- reference signal
- circuit
- phase
- output
- signal frequency
- 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
Landscapes
- Control Of Velocity Or Acceleration (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
PURPOSE: To realize the diversity of the in-use time of a video tape recorder by making a difference between the reference signal frequency of a phase control loop in recording and the control pulse frequency in reproduction by switching.
CONSTITUTION: Phase comparator 61 makes phase comparison between output gate pulses of gate pulse generating circuit 60 and the output reference signal of reference signal generator 67 and outputs a DC voltage equivalent to the phase difference. By way of loop filter 61 and synthesizing circuit 52, the output of circuit 61 is sent to motor driving circuit 53 and switch circuit 55 provides the multi- stage switching of the turning speed. Here, reference signal frequency change-over switch circuit 65 switches to set the reference signal frequency of a phase control loop in recording and the control pulse frequency in reproduction to different values. Consequently, H-shaped arrangement on a recorded tape pattern comes into effect completely and a capstan servo circuit can easily be realized.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6066679A JPS55153013A (en) | 1979-05-17 | 1979-05-17 | Controller for tape speed change-over of video tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6066679A JPS55153013A (en) | 1979-05-17 | 1979-05-17 | Controller for tape speed change-over of video tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55153013A true JPS55153013A (en) | 1980-11-28 |
Family
ID=13148873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6066679A Pending JPS55153013A (en) | 1979-05-17 | 1979-05-17 | Controller for tape speed change-over of video tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153013A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6267990A (en) * | 1985-09-19 | 1987-03-27 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
-
1979
- 1979-05-17 JP JP6066679A patent/JPS55153013A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6267990A (en) * | 1985-09-19 | 1987-03-27 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
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