JPS5526722A - Sprocket hole detector for picture reproducer - Google Patents
Sprocket hole detector for picture reproducerInfo
- Publication number
- JPS5526722A JPS5526722A JP9923578A JP9923578A JPS5526722A JP S5526722 A JPS5526722 A JP S5526722A JP 9923578 A JP9923578 A JP 9923578A JP 9923578 A JP9923578 A JP 9923578A JP S5526722 A JPS5526722 A JP S5526722A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- supplies
- signal
- output
- horizontal blanking
- 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 stabilize quanitity of light emitted by a flying-sopt scanning tube with detection precision of a hole signal improved, by extracting a video signal between a horizontal blanking interval and sprocket hole scanning interval and then by positively feeding it back to the cathode of a defective scanning tube.
CONSTITUTION: A video signal from photoelectric converter 5 is supplied to gate circuit 24, monostable multivibrator 23 supplies circuit 24 with pulses continuing for a fixed time corresponding to horizontal synchronizing signal SR, and the video signal is sent to clamping circuit 25. Corresponding to the output of differential amplifier 28, circuit 25 controls level for clamping a horizontal blanking signal and supplies its output to operational amplifier 29 and detector 26. By receiving a reference voltage, circuit 28 supplies clamping circuit 25 with a difference between a hole signal level voltage and the reference voltage. Circuit 29 supplies its inverting amplification output of the signal to adder 30, which sums up the horizontal blanking signals at terminal 31 and then supplies its output to the cathode of flying-spot scanning tube 1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9923578A JPS5526722A (en) | 1978-08-15 | 1978-08-15 | Sprocket hole detector for picture reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9923578A JPS5526722A (en) | 1978-08-15 | 1978-08-15 | Sprocket hole detector for picture reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5526722A true JPS5526722A (en) | 1980-02-26 |
Family
ID=14242010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9923578A Pending JPS5526722A (en) | 1978-08-15 | 1978-08-15 | Sprocket hole detector for picture reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5526722A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57202103U (en) * | 1981-06-15 | 1982-12-23 | ||
JPS63143903U (en) * | 1988-03-16 | 1988-09-21 |
-
1978
- 1978-08-15 JP JP9923578A patent/JPS5526722A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57202103U (en) * | 1981-06-15 | 1982-12-23 | ||
JPS63143903U (en) * | 1988-03-16 | 1988-09-21 |
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