US2093882A - Electron tube generator - Google Patents

Electron tube generator Download PDF

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Publication number
US2093882A
US2093882A US5154A US515435A US2093882A US 2093882 A US2093882 A US 2093882A US 5154 A US5154 A US 5154A US 515435 A US515435 A US 515435A US 2093882 A US2093882 A US 2093882A
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US
United States
Prior art keywords
transmitter
condenser
currents
coupling
potential
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 - Lifetime
Application number
US5154A
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English (en)
Inventor
Dirks Hermann
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2093882A publication Critical patent/US2093882A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention has for its object to create an electron tube generator wherein load variations shall be avoided under any circumstances. 'Ihis problem must be considered especially if the op- 5 eration is required to be most constant in frequency even if mechanically-oscillating controlling means such as quartzes are not employed. This requirement is now growing more and more important, since quartz only admits of operating on a predetermined wavelength whilst there is a necessity for working on any desired wavelengths.
  • the invention is adapted for use with simple transmitting arrangements, i. e. arrangements merely having one self-excited stage, as Well as with transmitters having several stages, but it is possible also to employ it with receivers.
  • the inventive idea is explained hereafter as employed in a two-stage transmitter controlled from a separate oscillator, the drawing being a diagrammatic illustration of this embodiment of the invention.
  • the controlling transmitter is designated R1
  • Transmitter R1 operates on the principle of self-excitation in a well-known manner. Disposed between the anode and grid of the transmitter R1 is an oscillatory circuit containing the split or tapped condenser C1 and the self-induction coil L1. In the arrangements hitherto in use the grid is connected to a suitable tapping of the condenser C1. There is thus a capacitive potentiometer-connection for effecting the back-coupling. Condenser C1 is earthed at a suitable point E. Moreover, transmitter R2 is connected to the condenser C1 and is through a variable condenser N2 of the transmitter R2 neutralized or balanced out from the anode in a Well-known manner.
  • Transmitter R1 is neutralized itself. It is known per se to neutralize stages located behind the controlling transmitter, but it is not known to neuralize a controlling transmitter, this transl5 mitter not being able to oscillate owing to such neutralization. Its oscillations are merely attributable to the inductive back-coupling.
  • the back-coupling of the transmitter R1 is not capacitive but 2O inductive, namely through coil L2.
  • a variable condenser N1 connected after the manner of a neutralizing condenser (one may perhaps consider such arrangement tobe a compensation device) and 25 having for its object to compensate for dephased currents.
  • transmitter R2 If transmitter R2 is not keyed and not well neutralized, then the frequency of the transmitter R1 can of course not be influenced by transmitter R2. If, however, transmitter R2 is keyed, 35 i. e. detuned, then capacitive currents I, 2 flow over the grid conductor and cathode conductor. These currents split up differently. Current I splits into a component 3, that ows to earth, and a component 4, whereas current 2 because 40 of the less resistance mainly passes to earth. In condenser C1 a current 5 flows at a definite moment, this current arriving from transmitter R1.
  • phase rotations will occur, because connected in parallel with condenser C1 is the self-induction coil L1, and current 4 flows not only over the internal tube capacity of the transmitter R1 but in part also through the self-induction coil L1 which for this current is connected in parallel with the internal tube capacity.
  • the backcoupling is not effected capacitively but by purely inductive means, that is, with the aid of coil L2, for example.
  • the capacitive currents cannot bring about an action on it, provided that their coaction takes place symmetrically, that is, the capacitive currents I and 2 for instance should not act to produce a drop of potential in the bridge diagonal, i. e. in the coil L1. It will be easily seen that this can be performed readily, because the neutralization acts to balance the bridge, no matter from Which side the currents are supplied to the bridge.
  • the back-coupling Will be always of the correct phase coincidence
  • transmitter R2 is loaded or not loaded.
  • an oscillator comprising a space discharge device having input and output circuits coupled by inductance coils, one of which is inthe output circuit and with a condenser forms the frequency determining circuit of the oscillator, a variably loaded space discharge device having its input circuit capacitively coupled to the oscillator by said condenser, and means connecting the inductance coil of the frequency determining circuit across one diagonal of a balanced Wheatstone bridge with the output terminals of the second discharge device connected across the other diagonal thereof.

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  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)
US5154A 1934-02-05 1935-02-05 Electron tube generator Expired - Lifetime US2093882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE433924X 1934-02-05

Publications (1)

Publication Number Publication Date
US2093882A true US2093882A (en) 1937-09-21

Family

ID=6502801

Family Applications (1)

Application Number Title Priority Date Filing Date
US5154A Expired - Lifetime US2093882A (en) 1934-02-05 1935-02-05 Electron tube generator

Country Status (4)

Country Link
US (1) US2093882A (enMihai)
FR (1) FR785001A (enMihai)
GB (1) GB433924A (enMihai)
NL (1) NL40918C (enMihai)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638549A (en) * 1945-12-28 1953-05-12 Us Navy Circuit for neutralization of frequency divider chains

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638549A (en) * 1945-12-28 1953-05-12 Us Navy Circuit for neutralization of frequency divider chains

Also Published As

Publication number Publication date
NL40918C (enMihai)
GB433924A (en) 1935-08-22
FR785001A (fr) 1935-07-31

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