US1946047A - Thermionic amplifier - Google Patents

Thermionic amplifier Download PDF

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Publication number
US1946047A
US1946047A US516108A US51610831A US1946047A US 1946047 A US1946047 A US 1946047A US 516108 A US516108 A US 516108A US 51610831 A US51610831 A US 51610831A US 1946047 A US1946047 A US 1946047A
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US
United States
Prior art keywords
transformer
circuit
voltage
resistance
amplifier
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
US516108A
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English (en)
Inventor
Pol Balthasar Van Der
Tellegen Bernardus Do Hubertus
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US1946047A publication Critical patent/US1946047A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/38—Positive-feedback circuit arrangements without negative feedback
    • H03F1/40—Positive-feedback circuit arrangements without negative feedback in discharge-tube amplifiers

Definitions

  • This invention relates to thermionic amplifiers and has for its purpose to render the current or voltage variations in the output circuit proportional to the vo1tage amplitudes 01 the incoming oscillations for all frequencies.
  • oscillations of difierent frequencies are unequa1ly amplified.
  • part of the output impedance is coupled with the input circuit such that for all frequncies the alternating current set up in the output impedance or the alternating voltage set up between the terminals of this im- -pedance are proportional to the voltage anaphtudes of the incoming oscillations.
  • signal voltages there am supplied voltages to the input circuit which, dependent on the fact whether an intermediate amplifier or a terminal amplifier is provided, are dependent 0n the eurrent or voltage variations set up in the output-cireuit.
  • Figs. 1 and. 2 show terminal amplification circuit arrangements
  • Fig. 3 a circuit arrangement of an intermediate amplification stage.
  • a transformer 2 in the output circuit of the thermionic tube 1 a transformer 2 is interposed whose primary side is connected in series with a loudspeaker 3.
  • the voltages set up in the secondary winding of this transformer are supplied. to the grid. 01 the tube in series W'1th the signal voltage.
  • New the ci1cuit arrangement is such that the electromotive force which is coupled. back is in opposi tion 01 phase to the pressure variations set up in the output circuit, whereas the value is g
  • a potentiometer 4 across the secondary of the transformer the back-coupling is rendered regulable.
  • Fig. 2 shows a terminal amplification circuit arrangement in which the energy is supplied to the loudspeaker across a transformer 5.
  • This transformer may serve at the same time for the back-coupling by providing an extra tap 6 at 109 the primary side. This tap is connected to the filament, whereas the portion, 6, 7 cf the primary winding (if desired a portion thereof across a potentiometer 8) is connected in series with the grid circuit.
  • the electro-motive force which is coupled back equals again just as in Fig. 1. 119
  • Fig. 3 shows an i'ntermediate amplification stage.
  • the thermionic tube 1' an ohmic resistance is connected in series with a coupling impedance 9 (for example a transformer)
  • the voltages Set up between the points 11 and 12 of this resistance are proportiona1 to the currents 'circulating in ehe transformer 9. These voltages are returned 1:0 the grid o1 the thermionic tube through a transformer 13 having a ratio of transformation 1:1.
  • Gare is to be taken that the impedanee 0f the transformer 13 is great relatively to the ohmic resistance cf 10, so that the voltage betvveen the points 11 and 12 practically depends on1y on this ohmic resistance, in other words is directly proportional 110 ia.
  • the transformer 13 the polarity of the voltage is reversed again, whereas by displacing the tap 11 along the resistance the valueof the voltage which is coupled back may be adjusted.
  • a space discharge device having an input circuit and an output circuit, said output circuit including a coupling impedance and a resistance element in series, a
  • transformer having i'ts primary shunted' across at least a portion of said resistance and its secondary included in said input circuit, the irnpedance of said transformer mecanic; of such a va1ue relative t'o the ohmic resistanc'e of said element that the voltage across said element depends subste'mtially only upon the drop across the resistance element.
  • a space discharge dev1ce having an input circuit and an output circuit, said output circuit including a coupling impedance and a resisfiance element in series, a transformer having its primary shuntedacross ab least aportion of said resistance and its secondary included in said input circuit the impedance of said transformer being high relative 110 the impedance of said resistance element whereby ehe voltage across the Glement depends .substantially only upon the drop across the resistance element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US516108A 1930-02-14 1931-02-16 Thermionic amplifier Expired - Lifetime US1946047A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL366683X 1930-02-14
NL32111T 1930-03-26

Publications (1)

Publication Number Publication Date
US1946047A true US1946047A (en) 1934-02-06

Family

ID=26641967

Family Applications (2)

Application Number Title Priority Date Filing Date
US516108A Expired - Lifetime US1946047A (en) 1930-02-14 1931-02-16 Thermionic amplifier
US516573A Expired - Lifetime US1904524A (en) 1930-02-14 1931-02-18 Amplifier

Family Applications After (1)

Application Number Title Priority Date Filing Date
US516573A Expired - Lifetime US1904524A (en) 1930-02-14 1931-02-18 Amplifier

Country Status (6)

Country Link
US (2) US1946047A (de)
BE (1) BE376504A (de)
DE (1) DE596006C (de)
FR (1) FR709513A (de)
GB (2) GB366683A (de)
NL (1) NL32111C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707232A (en) * 1949-11-03 1955-04-26 Cons Electric Company Impedance translating device
US3071735A (en) * 1959-06-04 1963-01-01 Blonder Tongue Elect Phase-shift-reducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753440C (de) * 1935-02-21 1954-03-22 Walter Rogowski Dr Schaltung zur Verminderung des Nachleuchtens bei Fernsehkathodenstrahlroehren
US10826448B2 (en) * 2019-03-11 2020-11-03 Inphi Corporation Trans-impedance amplifier (TIA) with a T-coil feedback loop

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707232A (en) * 1949-11-03 1955-04-26 Cons Electric Company Impedance translating device
US3071735A (en) * 1959-06-04 1963-01-01 Blonder Tongue Elect Phase-shift-reducing apparatus

Also Published As

Publication number Publication date
GB366683A (en) 1932-02-11
FR709513A (fr) 1931-08-07
DE596006C (de) 1934-04-25
BE376504A (de)
GB367511A (en) 1932-02-25
US1904524A (en) 1933-04-18
NL32111C (de)

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