GB483918A - Improvements in or relating to oscillation generators - Google Patents

Improvements in or relating to oscillation generators

Info

Publication number
GB483918A
GB483918A GB2917536A GB2917536A GB483918A GB 483918 A GB483918 A GB 483918A GB 2917536 A GB2917536 A GB 2917536A GB 2917536 A GB2917536 A GB 2917536A GB 483918 A GB483918 A GB 483918A
Authority
GB
United Kingdom
Prior art keywords
valve
circuit
resistance
grid
feed
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
GB2917536A
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.)
MAURICE MOEISE LEVY
STC PLC
Original Assignee
MAURICE MOEISE LEVY
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 MAURICE MOEISE LEVY, Standard Telephone and Cables PLC filed Critical MAURICE MOEISE LEVY
Priority to GB2917536A priority Critical patent/GB483918A/en
Priority to FR827954D priority patent/FR827954A/en
Publication of GB483918A publication Critical patent/GB483918A/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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube

Landscapes

  • Photoreceptors In Electrophotography (AREA)

Abstract

483,918. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., LAWRENCE, W., and LEVY, M. M. Oct. 27, 1936, No. 29175. [Class 40 (v)] An oscillator is provided with positive or regenerative feed-back at the oscillation frequency and with negative feed-back at all frequencies, the negative feed-back voltages being derived from a resistance in an output circuit whereby the same proportion of each component frequency in the output is fed back negatively. In the case of a dynatron oscillator having an anti-resonant circuit in the plate circuit of the valve for determining the fundamental oscillation frequency, an adjustable voltage derived from a feed-back resistance in the anode circuit of the valve is applied to the grid of the valve in such a phase as to oppose regeneration at all frequencies. The pentode valve V1 is provided with a positive feed-back coupling including a tuned antiresonant circuit C1, L1, the coil L1 being coupled to a coil L2 in the control-grid circuit. Negative feed-back is obtained from a resistance R1, so that the voltage applied to the grid consists of the sum of the voltages across the coil L2, and across the tapped part of the resistance R1, the tapping point being adjusted so that the positive feed-back is nearly neutralized by the negative feed-back. Several amplifier stages may be provided, the anodecathode circuit of the last valve being coupled to the grid-cathode circuit of the first valve as in the single-valve arrangement shown. Positive feed-back may be applied to one grid of an oscillator valve and negative feed-back to a second grid. In such an arrangement, the anode-cathode circuit includes a resistance and a coil in series, the resistance being tapped to supply the negative feed-back at all frequencies to one grid, and the coil being coupled to a tuned circuit to provide positive feedback at a particular frequency to the other grid. In a modification, the resistance R1 is connected in series with the tuned circuit and may be in series or in shunt to the output impedance, or alternatively negative feedback is obtained from a resistance in the common cathode lead providing grid bias for the valve, a byepassing condenser being connected across an adjustable portion of the resistance.
GB2917536A 1936-10-27 1936-10-27 Improvements in or relating to oscillation generators Expired GB483918A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2917536A GB483918A (en) 1936-10-27 1936-10-27 Improvements in or relating to oscillation generators
FR827954D FR827954A (en) 1936-10-27 1937-10-15 Oscillations generating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2917536A GB483918A (en) 1936-10-27 1936-10-27 Improvements in or relating to oscillation generators

Publications (1)

Publication Number Publication Date
GB483918A true GB483918A (en) 1938-04-27

Family

ID=10287325

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2917536A Expired GB483918A (en) 1936-10-27 1936-10-27 Improvements in or relating to oscillation generators

Country Status (2)

Country Link
FR (1) FR827954A (en)
GB (1) GB483918A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546645A (en) * 1946-08-31 1951-03-27 Conn Ltd C G Variable frequency oscillator
DE878228C (en) * 1943-12-15 1953-06-01 Siemens Ag Feedback tube generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878228C (en) * 1943-12-15 1953-06-01 Siemens Ag Feedback tube generator
US2546645A (en) * 1946-08-31 1951-03-27 Conn Ltd C G Variable frequency oscillator

Also Published As

Publication number Publication date
FR827954A (en) 1938-05-06

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