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GB565703A - Synchronizers for electric oscillators - Google Patents

Synchronizers for electric oscillators

Info

Publication number
GB565703A
GB565703A GB378/43A GB37843A GB565703A GB 565703 A GB565703 A GB 565703A GB 378/43 A GB378/43 A GB 378/43A GB 37843 A GB37843 A GB 37843A GB 565703 A GB565703 A GB 565703A
Authority
GB
United Kingdom
Prior art keywords
output
oscillator
frequency
resistances
voltage
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
GB378/43A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB565703A publication Critical patent/GB565703A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • 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)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Electronic Switches (AREA)

Abstract

565,703. Automatic control systems for high-frequency oscillators. STANDARD TELEPHONES & CABLES, Ltd. Jan. 8, 1943, No. 378. Convention date, Jan. 10, 1942. [Class 38 (iv)] Oscillation frequency.-An. oscillator is locked in synchronism with a source of periodic waves having a form dissimilar to waves of like frequency derived from the oscillator. A balanced detector circuit having one output terminal earthed supplies its output voltage to a reactance tube 1 or other frequency correcting means associated with the oscillator 2. As shown, a reduced frequency saw-tooth wave from the oscillator is applied to the grid of an amplifier 34, the output circuit of which applies balanced voltages derived from resistances 36, 37 to the anodes of two diodes D<SP>1</SP>, D<SP>2</SP>, the cathode of one of which is earthed, the cathode of the other being connected to an output conductor 25 to control the reactance tube. Equal resistances 26, 27, 17, 18 are connected in series across the anodes and cathodes of the diodes and to the respective junctions are connected the output terminals of a mains transformer 30. Variable resistances 13, 14 in the anode leads permit the amplitudes of the applied saw-tooth voltages, which are in opposed phase, to be balanced. A zero voltage output is obtained only when the positive portions of the combined voltage waves applied to the resistances 17, 18 have equal area, which occurs at a specified phase difference of 270 degrees. The conductor 25 receives a positive or negative voltage according to the sense and degree of displacement from this condition. A switch 33 permits suppression of the correcting voltage when desired.
GB378/43A 1942-01-10 1943-01-08 Synchronizers for electric oscillators Expired GB565703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426322A US2389025A (en) 1942-01-10 1942-01-10 Synchronizer for oscillators

Publications (1)

Publication Number Publication Date
GB565703A true GB565703A (en) 1944-11-23

Family

ID=23690310

Family Applications (1)

Application Number Title Priority Date Filing Date
GB378/43A Expired GB565703A (en) 1942-01-10 1943-01-08 Synchronizers for electric oscillators

Country Status (4)

Country Link
US (1) US2389025A (en)
BE (1) BE465930A (en)
FR (1) FR939024A (en)
GB (1) GB565703A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598370A (en) * 1949-04-16 1952-05-27 Gen Electric Balanced phase detector

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703362A (en) * 1945-10-19 1955-03-01 Malcom W P Strandberg Frequency finder system
US2700101A (en) * 1946-04-19 1955-01-18 Wallace Panoramic device
US2460112A (en) * 1946-09-26 1949-01-25 Rca Corp Beam deflection control for cathode-ray devices
US2525106A (en) * 1946-11-21 1950-10-10 Rca Corp Electronic keyer for direct current restoration
US2612637A (en) * 1946-11-29 1952-09-30 Rines Robert Harvey Pulse-echo tracking system
NL88575C (en) * 1947-09-27
US2632853A (en) * 1947-11-08 1953-03-24 Radio Television Inst Inc Electrical synchronizing system
US2591660A (en) * 1947-11-08 1952-04-01 Radio Television Inst Inc Stabilized electrical synchronizing system
US2610298A (en) * 1947-12-26 1952-09-09 Gen Electric Stabilized saw tooth oscillator
US2633554A (en) * 1948-01-24 1953-03-31 Rca Corp Beam deflection control
US2587750A (en) * 1948-11-05 1952-03-04 Morrison Montford Vacuum tube oscillator system
US2636988A (en) * 1949-02-02 1953-04-28 Synchronizer
NL156649B (en) * 1949-10-20 Keiji Taniuchi METHOD OF FORMING A TIE-OUT PART INTO A CONTAINER LID AND CONTAINER COVER MANUFACTURED BY THE PROCESS.
US2565896A (en) * 1949-12-31 1951-08-28 Rca Corp Synchronizing circuits
US2773984A (en) * 1950-12-18 1956-12-11 Itt Automatic phase or frequency control system
US2761972A (en) * 1953-03-10 1956-09-04 Thompson Prod Inc Frequency stabilizing circuit
US2850629A (en) * 1955-08-01 1958-09-02 Gen Dynamics Corp Sweep generator
US3181077A (en) * 1961-05-01 1965-04-27 Gen Precision Inc Grating generator
US3903473A (en) * 1974-04-22 1975-09-02 Control Data Corp Phase locking circuits utilizing bridge controlled clock with feedback

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598370A (en) * 1949-04-16 1952-05-27 Gen Electric Balanced phase detector

Also Published As

Publication number Publication date
BE465930A (en) 1946-12-14
FR939024A (en) 1948-11-02
US2389025A (en) 1945-11-13

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