GB637380A - Improvements in or relating to circuits for controlling the frequency of generated oscillations - Google Patents

Improvements in or relating to circuits for controlling the frequency of generated oscillations

Info

Publication number
GB637380A
GB637380A GB3515/47A GB351547A GB637380A GB 637380 A GB637380 A GB 637380A GB 3515/47 A GB3515/47 A GB 3515/47A GB 351547 A GB351547 A GB 351547A GB 637380 A GB637380 A GB 637380A
Authority
GB
United Kingdom
Prior art keywords
frequency
output
discriminator
phase
control
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
GB3515/47A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3515/47A priority Critical patent/GB637380A/en
Publication of GB637380A publication Critical patent/GB637380A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

637,380. Automatic frequency control systems. SMITH, .T. B. Feb. 6, 1947, No. 3515. [Class 38 (iv)] In a system for maintaining generated electrical oscillations in a fixed phase relationship with master oscillations by a control signal, dependent on phase difference, derived from a phase discriminator, the control signal is modified by the output of. the discriminator when a frequency difference occurs to effect rapid frequency correction. Output from a frequency divider 3 supplied from an oscillator 1, e.g. a pulse generator, the frequency, and phase of which is to be controlled, is applied together with the output from a master oscillator 2, e.g. a mains supply, to a phase discriminator 4, e.g. of the type described in Specification 534,749. Output from discriminator 4, amplified by a valve 5, serves to control the frequency of oscillator 1. With only phase deviation a smoothing circuit 6, 7 serves to prevent hunting, but sluggish control which would result from this circuit upon frequency deviation is avoided by a relay 15 which is energized through a rectifier 14 from the beat frequency output of discriminator 4 to short-circuit resistance 6. Integrated feedback by a resistance-capacity network between the junction of resistance 10, 11 and the control electrode of valve 5 is referred to.
GB3515/47A 1947-02-06 1947-02-06 Improvements in or relating to circuits for controlling the frequency of generated oscillations Expired GB637380A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3515/47A GB637380A (en) 1947-02-06 1947-02-06 Improvements in or relating to circuits for controlling the frequency of generated oscillations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3515/47A GB637380A (en) 1947-02-06 1947-02-06 Improvements in or relating to circuits for controlling the frequency of generated oscillations

Publications (1)

Publication Number Publication Date
GB637380A true GB637380A (en) 1950-05-17

Family

ID=9759782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3515/47A Expired GB637380A (en) 1947-02-06 1947-02-06 Improvements in or relating to circuits for controlling the frequency of generated oscillations

Country Status (1)

Country Link
GB (1) GB637380A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1079107B (en) * 1958-10-23 1960-04-07 Fernseh Gmbh Method for synchronizing two pulse trains
DE1079124B (en) * 1958-10-09 1960-04-07 Telefunken Gmbh Circuit arrangement for synchronizing a vibration generator
DE1090712B (en) * 1958-01-30 1960-10-13 Loewe Opta Ag Synchronizing arrangement using the phase comparison principle
US3054965A (en) * 1959-10-29 1962-09-18 Garold K Jensen Automatic bandwidth control with a.f.c.
US3078421A (en) * 1959-11-03 1963-02-19 Zenith Radio Corp Synchronizing a signal generator by utilizing variable filter in control circuit
DE1168480B (en) * 1952-12-31 1964-04-23 Gasaccumulator Svenska Ab Synchronizing device, especially for television receivers
DE1214721B (en) * 1958-02-28 1966-04-21 Ferguson Radio Corp Automatic frequency control circuit
DE1466093B1 (en) * 1964-07-27 1970-02-05 Gen Radio Co Infinitely adjustable frequency step unit for a frequency generator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1168480B (en) * 1952-12-31 1964-04-23 Gasaccumulator Svenska Ab Synchronizing device, especially for television receivers
DE1090712B (en) * 1958-01-30 1960-10-13 Loewe Opta Ag Synchronizing arrangement using the phase comparison principle
DE1214721B (en) * 1958-02-28 1966-04-21 Ferguson Radio Corp Automatic frequency control circuit
DE1079124B (en) * 1958-10-09 1960-04-07 Telefunken Gmbh Circuit arrangement for synchronizing a vibration generator
DE1079107B (en) * 1958-10-23 1960-04-07 Fernseh Gmbh Method for synchronizing two pulse trains
US3054965A (en) * 1959-10-29 1962-09-18 Garold K Jensen Automatic bandwidth control with a.f.c.
US3078421A (en) * 1959-11-03 1963-02-19 Zenith Radio Corp Synchronizing a signal generator by utilizing variable filter in control circuit
DE1466093B1 (en) * 1964-07-27 1970-02-05 Gen Radio Co Infinitely adjustable frequency step unit for a frequency generator

Similar Documents

Publication Publication Date Title
GB1293132A (en) Improvements in or relating to temperature controllers
GB637243A (en) Frequency and phase control system
GB637380A (en) Improvements in or relating to circuits for controlling the frequency of generated oscillations
GB1152863A (en) Method and device for Voltage Regulation
GB630871A (en) Improvements in oscillation generator systems
GB907082A (en) Control circuit
US3391332A (en) Silicon controlled rectifier circuits and power supplies
GB675105A (en) Improvements in or relating to automatic frequency-control circuits for electric oscillators
GB644083A (en) Improvements in or relating to electronic oscillation generators
GB611392A (en) Improvements in and relating to pulse generators
GB741387A (en) Improvements in or relating to automatic frequency control circuit arrangements
GB658837A (en) Improvements in or relating to circuits for automatic frequency-correction
US2760069A (en) Electronic keying
GB644084A (en) Improvements in or relating to electronic control apparatus
GB641890A (en) Improvements in and relating to automatic frequency control of radio-frequency oscillators
GB686901A (en) System for controlling and regulating the frequency of electrical oscillation
GB566829A (en) Improvements in frequency-controlled electric oscillators
GB1068852A (en) Improvements in and relating to electrical control devices
GB643290A (en) Improvements in or relating to circuits for demodulating frequency-modulated oscillations
GB661872A (en) Improvements in voltage regulator
GB641567A (en) Improvements in and relating to voltage stabilisers for direct current supplies
GB605664A (en) Improvements in or relating to alternating current voltage control systems
GB848324A (en) Synchronising electronic time bases
GB636909A (en) Improvements in or relating to voltage regulators
GB682189A (en) Improvements in or relating to arrangements for varying the amplitude of generated oscillations