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GB555771A - Stabilised vacuum tube variable frequency oscillators - Google Patents

Stabilised vacuum tube variable frequency oscillators

Info

Publication number
GB555771A
GB555771A GB565942A GB565942A GB555771A GB 555771 A GB555771 A GB 555771A GB 565942 A GB565942 A GB 565942A GB 565942 A GB565942 A GB 565942A GB 555771 A GB555771 A GB 555771A
Authority
GB
United Kingdom
Prior art keywords
bridge
arms
resistance
phase shift
valve
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
GB565942A
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 GB565942A priority Critical patent/GB555771A/en
Publication of GB555771A publication Critical patent/GB555771A/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

  • Ac-Ac Conversion (AREA)
  • Amplifiers (AREA)

Abstract

555,771. Valve generating circuits CLIFFORD, F. G. April 28, 1942, No. 5659. [Class 40 (v)] In a generator including a bridge in the feedback path consisting of two resistive ratio arms and two reactive arms one comprising a resistance in series with a capacity and the other a resistance in parallel with a capacity, the bridge includes in one or both ratio arms a non-linear resistance to stabilize the amplitude of the oscillations generated. The arrangement is such that no direct current can flow through the non-linear resistance and the current oscillations fed to the input diagonal of the bridge are in phase with the voltages produced across the output diagonal. Frequency is controlled by simultaneously varying the electrical quantities in each of the reactive bridge arms. When a single stage amplifier is used a transformer is used to obtain the necessary phase shift, Fig. 1 (not shown). Fig. 2 shows a phase changing valve used to provide the phase shift and associated with the bridge elements R1 C1, R2 C2, R4 and L which may be a lamp. For low frequencies the bridge is re-arranged so that the arms R1 Cl and R4 are interchanged to avoid a high resistance in the valve anode circuit. Fig. 4 shows an arrangement in which a buffer output stage is used without substantially altering the gain or phase shift. Specification 510,379 is referred to.
GB565942A 1942-04-28 1942-04-28 Stabilised vacuum tube variable frequency oscillators Expired GB555771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB565942A GB555771A (en) 1942-04-28 1942-04-28 Stabilised vacuum tube variable frequency oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB565942A GB555771A (en) 1942-04-28 1942-04-28 Stabilised vacuum tube variable frequency oscillators

Publications (1)

Publication Number Publication Date
GB555771A true GB555771A (en) 1943-09-07

Family

ID=9800215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB565942A Expired GB555771A (en) 1942-04-28 1942-04-28 Stabilised vacuum tube variable frequency oscillators

Country Status (1)

Country Link
GB (1) GB555771A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452586A (en) * 1944-03-23 1948-11-02 Sperry Corp Phase shift circuits
US2463073A (en) * 1945-01-26 1949-03-01 Rca Corp Oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452586A (en) * 1944-03-23 1948-11-02 Sperry Corp Phase shift circuits
US2463073A (en) * 1945-01-26 1949-03-01 Rca Corp Oscillator

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