JPS5718166A - Automatic frequency controlling circuit - Google Patents

Automatic frequency controlling circuit

Info

Publication number
JPS5718166A
JPS5718166A JP9290780A JP9290780A JPS5718166A JP S5718166 A JPS5718166 A JP S5718166A JP 9290780 A JP9290780 A JP 9290780A JP 9290780 A JP9290780 A JP 9290780A JP S5718166 A JPS5718166 A JP S5718166A
Authority
JP
Japan
Prior art keywords
capacitor
waveform
flyback pulse
malfunction
controlling circuit
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
JP9290780A
Other languages
Japanese (ja)
Inventor
Hiroshi Sawara
Shuji Ishikawa
Bunichi Otsuka
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 JP9290780A priority Critical patent/JPS5718166A/en
Publication of JPS5718166A publication Critical patent/JPS5718166A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)

Abstract

PURPOSE:Not to cause a malfunction of an AFC due to disorder of a waveform of a flyback pulse, by executing a phase control by use of only a stable part of the first half waveform of a flyback pulse. CONSTITUTION:A negative flyback pulse such as A is outputted from a coil 7C, and when this signal is in high potential, a diode 24 is off, and a capacitor 22 is charged. On the contrary, when the signal becomes low potential, the diode 24 is turned on, and the capacitor 22 is discharged. Therefore, a triangle wave such as B is formed in the capacitor 22. Furthermore, this triangle wave is formed in a waveform such as C by a limiting circuit which is constituted of diodes 26, 28, a capacitor 29 and resistances 30, 31. Accordingly, when a circuit constant is decided so that an inclined part of breaking of a signal shown in C is within a range of a phase point of ''0''-pi/2 of a flyback pulse, a malfunction of an AFC due to disorder of a waveform is prevented.
JP9290780A 1980-07-08 1980-07-08 Automatic frequency controlling circuit Pending JPS5718166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9290780A JPS5718166A (en) 1980-07-08 1980-07-08 Automatic frequency controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9290780A JPS5718166A (en) 1980-07-08 1980-07-08 Automatic frequency controlling circuit

Publications (1)

Publication Number Publication Date
JPS5718166A true JPS5718166A (en) 1982-01-29

Family

ID=14067548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9290780A Pending JPS5718166A (en) 1980-07-08 1980-07-08 Automatic frequency controlling circuit

Country Status (1)

Country Link
JP (1) JPS5718166A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156268A (en) * 1982-03-12 1983-09-17 Sanyo Electric Co Ltd Horizontal afc circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156268A (en) * 1982-03-12 1983-09-17 Sanyo Electric Co Ltd Horizontal afc circuit
JPH0369232B2 (en) * 1982-03-12 1991-10-31 Sanyo Electric Co

Similar Documents

Publication Publication Date Title
GB968512A (en) Improvements relating to switching circuits
EP0189237A3 (en) An inductive displacement transducer system
JPS5718166A (en) Automatic frequency controlling circuit
FR2371815A1 (en) VOLTAGE REGULATION CIRCUIT FOR OSC ILLATOR DIRECT CURRENT / DIRECT CURRENT CONVERTER USED IN PARTICULAR IN AN ELECTRONIC FLASH
GB1136693A (en) Voltage regulating circuit
GB1181350A (en) Improvements in Electrical Switching Regulators
JPS5417653A (en) Automatic high-frequency control circuit
GB1450964A (en) Circuit arrangement for reverse-biassing a variable capacitance diode
JPS53101650A (en) Switching regulator
JPS54115749A (en) Source voltage monitor
JPS5715573A (en) Afc circuit
JPS53143874A (en) Sending velocity command pulse generator
SU788092A1 (en) Device for control of secondary power supply source
JPS56135285A (en) White level tracking circuit
JPS5467661A (en) Switching regulator controller
JPS5723334A (en) Tuning circuit equipped with vco
JPS57194627A (en) Protecting device for load control circuit
JPS56111313A (en) Fm tuning display device
JPS5558794A (en) Driving system for step motor
JPS53141565A (en) A-d converter circuit
GB953918A (en) Improvements in or relating to circuit arrangements for limiting modulated electrical signals
JPS51136126A (en) Self oscillation type converter device
JPS5372512A (en) Automatic fine adjusting device
JPS5275220A (en) Automatic frequency control circuit
JPS57148434A (en) Laser diode driving device