GB644083A - Improvements in or relating to electronic oscillation generators - Google Patents

Improvements in or relating to electronic oscillation generators

Info

Publication number
GB644083A
GB644083A GB3184847A GB3184847A GB644083A GB 644083 A GB644083 A GB 644083A GB 3184847 A GB3184847 A GB 3184847A GB 3184847 A GB3184847 A GB 3184847A GB 644083 A GB644083 A GB 644083A
Authority
GB
United Kingdom
Prior art keywords
valve
amplifier
resistance
diode
bridge
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
GB3184847A
Inventor
Charles Fountain Brockelsby
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.)
Marconi Instruments Ltd
Original Assignee
Marconi Instruments 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 Marconi Instruments Ltd filed Critical Marconi Instruments Ltd
Priority to GB3184847A priority Critical patent/GB644083A/en
Publication of GB644083A publication Critical patent/GB644083A/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
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/26—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator
    • H03B5/28—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator active element in amplifier being vacuum tube

Landscapes

  • Amplifiers (AREA)
  • Plasma Technology (AREA)

Abstract

644,083. Automatic voltage control systems. MARCONI INSTRUMENTS, Ltd. Dec. 2, 1947, No. 31848. [Class 38 (iv)] [Also in Group XL (c)] An oscillator comprises an amplifier to which both positive and negative feed-back are applied by means of a resistance-capacity bridge network in which one arm is a valve acting as a variable impedance, being controlled by a control potential derived from the output of the amplifier. A double triode V1 is coupled by a common cathode resistance 5 and the second element is coupled to a further stage V2, feeding a " Weir " type bridge network. Positive feed-back is applied to the grid of the second element of VI from one arm of the bridge, comprising the anode-cathode path of a valve V3, while negative feed-back is applied to the first element of V1 from the opposite corner of the bridge. The impedance of the valve V3 is reduced by negative feed-back over resistances 40, 41 and is controlled by the grid bias, which is derived from the amplifier output by means of a diode rectifier 23 ; a delay bias is applied to the diode from a negative source over resistance 28 and a gas-discharge tube 26. The sensitivity of control may be increased by further amplification, such as a D.C. amplifier inserted between the diode 23 and valve V3.
GB3184847A 1947-12-02 1947-12-02 Improvements in or relating to electronic oscillation generators Expired GB644083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3184847A GB644083A (en) 1947-12-02 1947-12-02 Improvements in or relating to electronic oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3184847A GB644083A (en) 1947-12-02 1947-12-02 Improvements in or relating to electronic oscillation generators

Publications (1)

Publication Number Publication Date
GB644083A true GB644083A (en) 1950-10-04

Family

ID=10329303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3184847A Expired GB644083A (en) 1947-12-02 1947-12-02 Improvements in or relating to electronic oscillation generators

Country Status (1)

Country Link
GB (1) GB644083A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777955A (en) * 1953-12-29 1957-01-15 Cgs Lab Inc Controllable inductor oscillator with bridge control circuit
US2789162A (en) * 1952-03-01 1957-04-16 Gen Electric Wave amplifying circuits
US2820903A (en) * 1954-04-06 1958-01-21 Elliott Brothers London Ltd Wien bridge oscillator
US3114116A (en) * 1959-10-14 1963-12-10 Siemens Ag Stabilized bridge oscillation generator
US3144619A (en) * 1961-07-14 1964-08-11 Hewlett Packard Co Oscillation generator having an amplitude stabilizing circuit
US3339156A (en) * 1961-05-03 1967-08-29 Siemens Ag Amplitude stabilized alternating current generator
US3369193A (en) * 1966-08-01 1968-02-13 Weston Instruments Inc Oscillator with controlled linear feedback circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789162A (en) * 1952-03-01 1957-04-16 Gen Electric Wave amplifying circuits
US2777955A (en) * 1953-12-29 1957-01-15 Cgs Lab Inc Controllable inductor oscillator with bridge control circuit
US2820903A (en) * 1954-04-06 1958-01-21 Elliott Brothers London Ltd Wien bridge oscillator
US3114116A (en) * 1959-10-14 1963-12-10 Siemens Ag Stabilized bridge oscillation generator
US3339156A (en) * 1961-05-03 1967-08-29 Siemens Ag Amplitude stabilized alternating current generator
US3144619A (en) * 1961-07-14 1964-08-11 Hewlett Packard Co Oscillation generator having an amplitude stabilizing circuit
US3369193A (en) * 1966-08-01 1968-02-13 Weston Instruments Inc Oscillator with controlled linear feedback circuit

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