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GB928953A - Frequency-control circuit for an electronic oscillator - Google Patents

Frequency-control circuit for an electronic oscillator

Info

Publication number
GB928953A
GB928953A GB32656/59A GB3265659A GB928953A GB 928953 A GB928953 A GB 928953A GB 32656/59 A GB32656/59 A GB 32656/59A GB 3265659 A GB3265659 A GB 3265659A GB 928953 A GB928953 A GB 928953A
Authority
GB
United Kingdom
Prior art keywords
diode
cathode
anode
oscillator
frequency
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
GB32656/59A
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 GB928953A publication Critical patent/GB928953A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
    • H03D13/009—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • 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
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/58—Control of contrast or brightness in dependence upon ambient light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Amplifiers (AREA)

Abstract

928,953. Thermionic-cathode tubes. STANDARD TELEPHONES & CABLES Ltd. Sept. 25, 1959 [Sept. 27, 1958], No. 32656/59. Class 39 (1). [Also in Group XL (c)] An oscillator frequency is controlled by one or more capacitors C3, C2 and a diode K1, A1 connected in series between the anode and cathode of the oscillator tube and in the same envelope as the latter, a control voltage being applied to vary the diode impedance. The capacitor C3 may be formed by a metal annulus S surrounding a cylindrical anode A (Fig. 5) and the diode anode by a reduced diameter section S1 of the annulus surrounding the cathode K. Alternatively a metal plate may be capacitively coupled with the oscillator tube anode and may be extended to form with the oscillator cathode a diode control tube.
GB32656/59A 1958-09-27 1959-09-25 Frequency-control circuit for an electronic oscillator Expired GB928953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1958ST014285 DE1073042B (en) 1958-09-27 1958-09-27 Frequency control arrangement based on the principle of current inflow angle control, preferably for the m and dm range of television receivers

Publications (1)

Publication Number Publication Date
GB928953A true GB928953A (en) 1963-06-19

Family

ID=43432128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32656/59A Expired GB928953A (en) 1958-09-27 1959-09-25 Frequency-control circuit for an electronic oscillator

Country Status (3)

Country Link
DE (1) DE1073042B (en)
FR (1) FR1240163A (en)
GB (1) GB928953A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386051A (en) * 1965-12-22 1968-05-28 Ericsson Telefon Ab L M Means for gradually switching capacitor into and out of variable frequency oscillator
US3393379A (en) * 1966-11-30 1968-07-16 Rca Corp Frequency control circuit utilizing switching means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386051A (en) * 1965-12-22 1968-05-28 Ericsson Telefon Ab L M Means for gradually switching capacitor into and out of variable frequency oscillator
US3393379A (en) * 1966-11-30 1968-07-16 Rca Corp Frequency control circuit utilizing switching means

Also Published As

Publication number Publication date
FR1240163A (en) 1960-12-12
DE1073042B (en) 1960-01-14

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