JPS5637787A - Waveform shaping circuit for index signal - Google Patents

Waveform shaping circuit for index signal

Info

Publication number
JPS5637787A
JPS5637787A JP11334479A JP11334479A JPS5637787A JP S5637787 A JPS5637787 A JP S5637787A JP 11334479 A JP11334479 A JP 11334479A JP 11334479 A JP11334479 A JP 11334479A JP S5637787 A JPS5637787 A JP S5637787A
Authority
JP
Japan
Prior art keywords
index signal
index
amplitude
sample holding
change
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.)
Granted
Application number
JP11334479A
Other languages
Japanese (ja)
Other versions
JPS6210475B2 (en
Inventor
Katsuo Isono
Osamu Irie
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 Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP11334479A priority Critical patent/JPS5637787A/en
Publication of JPS5637787A publication Critical patent/JPS5637787A/en
Publication of JPS6210475B2 publication Critical patent/JPS6210475B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position

Abstract

PURPOSE:To produce the index pulse having no change of the phase, by forming the threshold voltage which varies in proportion to the amplitude of the index signal. CONSTITUTION:The index signal detected by the photodetector 21 is divided through the BPF22 into the index signals having the opposite phase to each other. These two signals are supplied to the waveform shaping circuit 50 consisting of the amplitude detector 60, the sample holding circuit 70 and the level comparator 90 each. Then the both signals undergo a full-wave detection through the detector 60, and this detection signal receives the sample holding at the sample holding circuit 70. The sample holding voltage varies in proportion to the change of the amplitude of the index signal. Thus this voltage is used for the threshold voltage of the comparator 90 to receive a level comparison with the index signal. In such way, the index pulse with no change of the phase can be obtained although the amplitude of the index signal may vary.
JP11334479A 1979-09-04 1979-09-04 Waveform shaping circuit for index signal Granted JPS5637787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11334479A JPS5637787A (en) 1979-09-04 1979-09-04 Waveform shaping circuit for index signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11334479A JPS5637787A (en) 1979-09-04 1979-09-04 Waveform shaping circuit for index signal

Publications (2)

Publication Number Publication Date
JPS5637787A true JPS5637787A (en) 1981-04-11
JPS6210475B2 JPS6210475B2 (en) 1987-03-06

Family

ID=14609858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11334479A Granted JPS5637787A (en) 1979-09-04 1979-09-04 Waveform shaping circuit for index signal

Country Status (1)

Country Link
JP (1) JPS5637787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814387A (en) * 1995-01-24 1998-09-29 Orihara Manufacturing Co., Ltd. Rubber band for repairs and method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814387A (en) * 1995-01-24 1998-09-29 Orihara Manufacturing Co., Ltd. Rubber band for repairs and method therefor

Also Published As

Publication number Publication date
JPS6210475B2 (en) 1987-03-06

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