GB626786A - Improvements in or relating to stabilised electric oscillation generators - Google Patents

Improvements in or relating to stabilised electric oscillation generators

Info

Publication number
GB626786A
GB626786A GB1289247A GB1289247A GB626786A GB 626786 A GB626786 A GB 626786A GB 1289247 A GB1289247 A GB 1289247A GB 1289247 A GB1289247 A GB 1289247A GB 626786 A GB626786 A GB 626786A
Authority
GB
United Kingdom
Prior art keywords
thermistor
amplitude
feed
oscillator
changes
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
GB1289247A
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.)
ALAN YOUNG COOPER
STC PLC
Original Assignee
ALAN YOUNG COOPER
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 ALAN YOUNG COOPER, Standard Telephone and Cables PLC filed Critical ALAN YOUNG COOPER
Priority to GB1289247A priority Critical patent/GB626786A/en
Publication of GB626786A publication Critical patent/GB626786A/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
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
    • 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

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

626,786. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., COOPER, A. Y., and McALLAN, J. G. May 13, 1947, No. 12892. [Class 40 (vi)] A resistance-capacitance oscillator has a first thermistor for stabilizing the amplitude of the oscillations and a second thermistor for compensating for changes in amplitude due to changes in ambient temperature of the first thermistor. The Figure shows an oscillator of the type described in Specification 575,395, comprising valves 1 and 2 having a resistance capacitance positive feed-back path 33, 34, 35, 36 and an amplitude stabilizing negative feed-back path through thermistor 3. The oscillator is followed by a two-stage amplifier 4, 5, the output current of which flows through the output transformer 41 and through a resistance network in the cathode circuit of valve 4 producing negative feed-back. This network includes a thermistor 6 operated at low temperature and arranged such that variations in ambient temperature which vary the amplitude at which thermistor stabilizes are compensated by changes in negative feedback due to similar variations in the ambient temperature of thermistor 6. It is suggested that the second thermistor need not be in a feed-back path and that the compensating network may include further thermistors.
GB1289247A 1947-05-13 1947-05-13 Improvements in or relating to stabilised electric oscillation generators Expired GB626786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1289247A GB626786A (en) 1947-05-13 1947-05-13 Improvements in or relating to stabilised electric oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1289247A GB626786A (en) 1947-05-13 1947-05-13 Improvements in or relating to stabilised electric oscillation generators

Publications (1)

Publication Number Publication Date
GB626786A true GB626786A (en) 1949-07-21

Family

ID=10013050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1289247A Expired GB626786A (en) 1947-05-13 1947-05-13 Improvements in or relating to stabilised electric oscillation generators

Country Status (1)

Country Link
GB (1) GB626786A (en)

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