JPS5526722A - Sprocket hole detector for picture reproducer - Google Patents

Sprocket hole detector for picture reproducer

Info

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
Application number
JP9923578A
Other languages
Japanese (ja)
Inventor
Takaaki Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Group Corp
Original Assignee
Aiwa Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aiwa Co Ltd filed Critical Aiwa Co Ltd
Priority to JP9923578A priority Critical patent/JPS5526722A/en
Publication of JPS5526722A publication Critical patent/JPS5526722A/en
Pending legal-status Critical Current

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
JP9923578A 1978-08-15 1978-08-15 Sprocket hole detector for picture reproducer Pending JPS5526722A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57202103U (en) * 1981-06-15 1982-12-23
JPS63143903U (en) * 1988-03-16 1988-09-21

Cited By (2)

* Cited by examiner, † Cited by third party
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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