GB523648A - Improvements in or relating to electrical oscillation generators - Google Patents

Improvements in or relating to electrical oscillation generators

Info

Publication number
GB523648A
GB523648A GB23786/39A GB2378639A GB523648A GB 523648 A GB523648 A GB 523648A GB 23786/39 A GB23786/39 A GB 23786/39A GB 2378639 A GB2378639 A GB 2378639A GB 523648 A GB523648 A GB 523648A
Authority
GB
United Kingdom
Prior art keywords
frequency
valve
cable
condenser
reactance
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
GB23786/39A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB523648A publication Critical patent/GB523648A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J9/00—Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification
    • H03J9/002—Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification comprising one or more tuning stages separated from the rest of a receiver

Abstract

523,648. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and RAMSAY, J. F. Jan 10, 1939, No. 23786. Divided out of 513,679. [Class 40 (v)] A remotely-tunable oscillator, suitable for control of a superheterodyne receiver, comprises a valve 1 with an oscillationmaintaining and frequency-determining circuit consisting of a length of high-frequency cable connected between the anode and control grid. A variable reactance TL is inserted in series at its midpoint, and the two halves of the cable run in parallel from the valve to the remote variablereactance tuning-device. If the reactance TL is an inductance, the frequency range extends from a low value to that value at which the total cable resonates at a half wavelength when TL is zero. If the reactance is a condenser, the frequency extends from this "halfwave" frequency when the condenser is large, to practically twice this value. If the variable reactance is a condenser in series with a loading coil, the frequency range extends from a little above zero to twice the "half-wave" frequency. Several valves in cascade may be employed, the cable extending from the output of one valve to the input of a preceding valve. Feedback may be reduced by tapping down the anode or grid connections to the cable. Higherorder modes of oscillation may be obtained as described in Specification 493,862. Specification 513,679 also is referred to.
GB23786/39A 1938-02-17 1939-01-10 Improvements in or relating to electrical oscillation generators Expired GB523648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5004/38A GB513679A (en) 1938-02-17 1938-02-17 Improvements in or relating to electrical oscillation generators

Publications (1)

Publication Number Publication Date
GB523648A true GB523648A (en) 1940-07-18

Family

ID=9787912

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5004/38A Expired GB513679A (en) 1938-02-17 1938-02-17 Improvements in or relating to electrical oscillation generators
GB23786/39A Expired GB523648A (en) 1938-02-17 1939-01-10 Improvements in or relating to electrical oscillation generators

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5004/38A Expired GB513679A (en) 1938-02-17 1938-02-17 Improvements in or relating to electrical oscillation generators

Country Status (2)

Country Link
US (1) US2272851A (en)
GB (2) GB513679A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429085A (en) * 1943-06-25 1947-10-14 Rca Corp Condenser structure
US2540137A (en) * 1943-12-14 1951-02-06 Irving H Page Wide range tuning circuit
US2439286A (en) * 1944-02-16 1948-04-06 Rca Corp Oscillation generator
US2483189A (en) * 1944-09-13 1949-09-27 Hartford Nat Bank & Trust Comp Transmission line oscillator
US2505022A (en) * 1945-07-20 1950-04-25 Standard Telephones Cables Ltd Two-channel oscillator
US2717313A (en) * 1951-05-29 1955-09-06 Rca Corp Tunable circuit structure
US2728853A (en) * 1952-11-20 1955-12-27 Rca Corp Oscillator circuits
US2772393A (en) * 1952-12-23 1956-11-27 California Research Corp Water-in-oil detector
US2925477A (en) * 1957-09-12 1960-02-16 Radiation Inc Radio frequency amplifier
FR1337423A (en) * 1962-07-31 1963-09-13 Csf Improvements to monochromatic light sources of constant intensity
US3181082A (en) * 1962-10-08 1965-04-27 Collins Radio Co Oscillator having remotely situated crystal connected to remaining circuitry by transmission lines substantally n/2 wavelengths with respect to said crystal frequency

Also Published As

Publication number Publication date
US2272851A (en) 1942-02-10
GB513679A (en) 1939-10-19

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