GB658837A - Improvements in or relating to circuits for automatic frequency-correction - Google Patents

Improvements in or relating to circuits for automatic frequency-correction

Info

Publication number
GB658837A
GB658837A GB26277/48A GB2627748A GB658837A GB 658837 A GB658837 A GB 658837A GB 26277/48 A GB26277/48 A GB 26277/48A GB 2627748 A GB2627748 A GB 2627748A GB 658837 A GB658837 A GB 658837A
Authority
GB
United Kingdom
Prior art keywords
valve
grid
reactance
cathode
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
GB26277/48A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB658837A publication Critical patent/GB658837A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only
    • 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
    • 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
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

658,837. Automatic frequency control systems. PHILIPS ELECTRICAL, Ltd. Oct. 8, 1948, No. 26277. Convention date, Oct. 13, 1947. [Class 38 (iv)] Relates to automatic frequency control systems of the kind in which a valve oscillator is maintained in synchronism with a standard source by a valve reactance to which a correcting voltage is applied; and consists in deriving grid-cathode bias for the reactance valve from a resistor included in the cathode lead of the oscillator. The oscillator valve 1 has the normal three-point connection to the tuned circuit 4, which is shunted by the reactance valve 13. Oscillations from the anode of the valve 1 are mixed at 23 with oscillations from a standard source 22 to provide a correcting voltage (e.g. in the manner described in Specification 577,019), which is applied to a grid of the reactance valve 13. A condenser-shunted resistor 19 included in the earth connection of the oscillator valve 1 is also included in the earth connection of the reactance valve cathode, and thus affords grid to cathode bias for this valve. The grid leak 20 of the valve 13 is earthed, and the grid leak 7 of the valve 1 is preferably connected to its cathode. When the supply voltage drifts, two effects are produced on the reactance valve, the change in oscillatory frequency causing a change of the correcting- voltage applied to its grid, and the change in direct current through the resistor 19 causing a change in its cathode voltage. These two effects are arranged to oppose each other, by suitable choice of the polarity of the quadrature voltage applied to the reactance valve grid. In the example shown, this is affected by coupling the anode of the valve 13 to one end of the tuned circuit 4, and by coupling the grid of the valve 13 to the opposite end of the tuned circuit 4 through a quadrature network 24, 25. As a further frequency control, a saturable-core inductance 26 may be connected across part of the tuned circuit 4, and its inductance value varied by a coil 27 in the D.C. supply to the reactance valve.
GB26277/48A 1947-10-13 1948-10-08 Improvements in or relating to circuits for automatic frequency-correction Expired GB658837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL658837X 1947-10-13

Publications (1)

Publication Number Publication Date
GB658837A true GB658837A (en) 1951-10-17

Family

ID=19795320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26277/48A Expired GB658837A (en) 1947-10-13 1948-10-08 Improvements in or relating to circuits for automatic frequency-correction

Country Status (3)

Country Link
US (1) US2564205A (en)
FR (1) FR973424A (en)
GB (1) GB658837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643179A (en) * 1969-07-30 1972-02-15 Admiral Corp Reactance tube controlled pentode oscillator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930892A (en) * 1954-03-26 1960-03-29 Sperry Rand Corp Demodulator for a phase or frequency modulated signal
US2888643A (en) * 1955-04-29 1959-05-26 Gen Electric Apparatus for determining frequency
US3199051A (en) * 1962-06-15 1965-08-03 Richard A Hills Oscillator with frequency modulating iron core reactor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258470A (en) * 1940-04-27 1941-10-07 Radio Patents Corp Electronic reactance device
US2298437A (en) * 1940-06-05 1942-10-13 Rca Corp Frequency modulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643179A (en) * 1969-07-30 1972-02-15 Admiral Corp Reactance tube controlled pentode oscillator

Also Published As

Publication number Publication date
FR973424A (en) 1951-02-09
US2564205A (en) 1951-08-14

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