GB644086A - Improvements in or relating to thermionic valve oscillation generators - Google Patents

Improvements in or relating to thermionic valve oscillation generators

Info

Publication number
GB644086A
GB644086A GB3226147A GB3226147A GB644086A GB 644086 A GB644086 A GB 644086A GB 3226147 A GB3226147 A GB 3226147A GB 3226147 A GB3226147 A GB 3226147A GB 644086 A GB644086 A GB 644086A
Authority
GB
United Kingdom
Prior art keywords
sinusoidal
saw
crystal
capacitor
tooth
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
GB3226147A
Inventor
Ralph Aubrey Spears
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB3226147A priority Critical patent/GB644086A/en
Publication of GB644086A publication Critical patent/GB644086A/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
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

644,086. Valve oscillator circuits. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Dec. 6, 1947, No. 32261. [Class 40 (vi)] A saw-tooth generator of the Miller-transition type has its frequency stabilized and can be switched to produce a sinusoidal output by the connection of a piezo-electric crystal across the Miller feed-back capacitor. The Figure shows an oscillator in which the Miller feed-back capacitor C1 is shunted by a crystal X which has a resonant frequency which is harmonically related to the repetition frequency of the sawtooth generator which is adjustable by varying capacitor C1. During the forward stroke of the sawtooth the anode voltage falls linearly in the normal manner and the crystal produces H.F. sinusoidal oscillations which are superimposed upon the saw-tooth waveform and which determine the exact point at which the fly-back stroke commences. Due to the high Q of the crystal the H.F. oscillations continue during the short fly-back period, the duration of which is determined by the time constant of the network C2, R5. The positive feed-back produced by capacitor improves the performance of the stage as a sinusoidal oscillator. In the position shown of the switch S1 a saw-tooth waveform is derived from terminal 1, the network L1, C5 filtering out the sinusoidal voltage. In the lower position of the switch, a sinusoidal waveform is derived from the terminal 2 and the saw-tooth voltage is removed by network L2, C6.
GB3226147A 1947-12-06 1947-12-06 Improvements in or relating to thermionic valve oscillation generators Expired GB644086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3226147A GB644086A (en) 1947-12-06 1947-12-06 Improvements in or relating to thermionic valve oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3226147A GB644086A (en) 1947-12-06 1947-12-06 Improvements in or relating to thermionic valve oscillation generators

Publications (1)

Publication Number Publication Date
GB644086A true GB644086A (en) 1950-10-04

Family

ID=10335860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3226147A Expired GB644086A (en) 1947-12-06 1947-12-06 Improvements in or relating to thermionic valve oscillation generators

Country Status (1)

Country Link
GB (1) GB644086A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755385A (en) * 1953-03-27 1956-07-17 John R Parsons Pulsing oscillator
DE1289887B (en) * 1966-09-29 1969-02-27 Siemens Ag Oscillator switching with a transistor with an electromechanical oscillator that stabilizes the frequency of the high-frequency electrical oscillations to be generated in the oscillator circuit and with an electrical resistor that stabilizes the DC operating point

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755385A (en) * 1953-03-27 1956-07-17 John R Parsons Pulsing oscillator
DE1289887B (en) * 1966-09-29 1969-02-27 Siemens Ag Oscillator switching with a transistor with an electromechanical oscillator that stabilizes the frequency of the high-frequency electrical oscillations to be generated in the oscillator circuit and with an electrical resistor that stabilizes the DC operating point

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