GB944161A - Improvements in or relating to oscillator synchronizing circuit arrangements - Google Patents

Improvements in or relating to oscillator synchronizing circuit arrangements

Info

Publication number
GB944161A
GB944161A GB1197759A GB1197759A GB944161A GB 944161 A GB944161 A GB 944161A GB 1197759 A GB1197759 A GB 1197759A GB 1197759 A GB1197759 A GB 1197759A GB 944161 A GB944161 A GB 944161A
Authority
GB
United Kingdom
Prior art keywords
sawtooth
gate circuit
oscillator
output
flyback
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.)
Expired
Application number
GB1197759A
Inventor
John Lewis Edwin Baldwin
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.)
Rank Bush Murphy Ltd
Original Assignee
Rank Bush Murphy 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 Rank Bush Murphy Ltd filed Critical Rank Bush Murphy Ltd
Priority to GB1197759A priority Critical patent/GB944161A/en
Priority to DER27703A priority patent/DE1176184B/en
Publication of GB944161A publication Critical patent/GB944161A/en
Expired 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
    • H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Synchronizing For Television (AREA)

Abstract

944,161. Automatic phase control systems. RANK-BUSH MUBPHY Ltd. April 11, 1960 [April 9, 1959], No. 11977/59. Heading H3A. An oscillator is synchronised by sync pulses applied to open a diode gate circuit and sample the instantaneous (positive or negative) value of a balanced sawtooth wave derived from the oscillator, the integrated output of the gate circuit phase locking the oscillator so that the sync pulses and midpoint of the long flank of the sawtooth waves coincide. Further, the gate circuit has resistive or time constant means 40 connected across its diagonal, or in one or both of the sync inputs to the gate circuit to limit, during out of synchronism, the change in voltage across output capacitor 26 occurring at sawtooth flyback instants so that instead of the output across capacitor 26 being a sawtooth balanced about zero voltage with sharp flyback, the output flyback is partially suppressed and a .D.C. component arises of polaity indicating the relative sense of the frequency slip (difference frequency) between the sawtooth and sync inputs and speedily restoring frequency equality. The charge limiting resistors may be replaced by constant current devices, e.g. pentode valves, or non-linear resistors. The system may be applied to synchronizing television receiver scanning.
GB1197759A 1959-04-09 1959-04-09 Improvements in or relating to oscillator synchronizing circuit arrangements Expired GB944161A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1197759A GB944161A (en) 1959-04-09 1959-04-09 Improvements in or relating to oscillator synchronizing circuit arrangements
DER27703A DE1176184B (en) 1959-04-09 1960-04-06 Circuit arrangement for synchronizing an oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1197759A GB944161A (en) 1959-04-09 1959-04-09 Improvements in or relating to oscillator synchronizing circuit arrangements

Publications (1)

Publication Number Publication Date
GB944161A true GB944161A (en) 1963-12-11

Family

ID=9996152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1197759A Expired GB944161A (en) 1959-04-09 1959-04-09 Improvements in or relating to oscillator synchronizing circuit arrangements

Country Status (2)

Country Link
DE (1) DE1176184B (en)
GB (1) GB944161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242907A1 (en) * 1986-04-15 1987-10-28 Koninklijke Philips Electronics N.V. Coincidence circuit in a line synchronizing circuit arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408591A (en) * 1966-02-18 1968-10-29 Varian Associates Time scale changer for atomic stabilized frequency sources

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL182822B (en) * 1952-11-15 Roskam Willem Gerrit PREPARATIVE ELECTROPHONE DEVICE.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242907A1 (en) * 1986-04-15 1987-10-28 Koninklijke Philips Electronics N.V. Coincidence circuit in a line synchronizing circuit arrangement

Also Published As

Publication number Publication date
DE1176184B (en) 1964-08-20

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