US2202361A - Amplifier circuit - Google Patents

Amplifier circuit Download PDF

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Publication number
US2202361A
US2202361A US107920A US10792036A US2202361A US 2202361 A US2202361 A US 2202361A US 107920 A US107920 A US 107920A US 10792036 A US10792036 A US 10792036A US 2202361 A US2202361 A US 2202361A
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US
United States
Prior art keywords
circuit
anode
amplifier
inductance
amplification
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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
US107920A
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English (en)
Inventor
Verbeek Henri Petrus Johan
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
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RCA Corp
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Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
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Publication of US2202361A publication Critical patent/US2202361A/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B15/00—Elements, tools, or details of ploughs
    • A01B15/12—Beams; Handles
    • 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
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only

Definitions

  • I t t t I arrangement is consequently/S25.
  • the amplification for oscil- This invention has reference to a circuit arrangement for amplifying electric oscillations which transmits a particularly large range of frequencies, for example, from to 2 l0 cycles. Such amplifier arrangements are used inter alia for television purposes.
  • the anode circuit of the amplifier valves should include inv series an-inductance and a resistance.
  • the anode circuit of one or more amplifier valves includes an impedance formed by the series combination ofan-inductance and a resistance by connecting in; parallel with part of this impedancea capacity or the. series combination ofan inductance and a capacity.
  • FIG. 1 and 2 show familiar amplifier circuits
  • Figs. 3, 4 and 5 show three examples of circuitv arrangements embodying the invention.
  • Fig. 1 shows a customary resistance amplifier.
  • the oscillations to be amplified are supplied to the terminals a and 12, whereas theoscillations amplified are obtained from/the terminals 0 and d which are connected to the control grid and the cathode of a second amplifier valve (not shown).
  • amplified a decrease in amplification occursas aresult of the influence of the coupling condenser'C and ofthe leak R This influence is, however, negligible in the case of comparatively high frequencies.
  • ternating current 'SV occurs in the anode cir-.
  • the circuit 'arrangements shown in Figs. 3 and 4 have a ca pacity C connected in parallel with part of the impedance of the anode circuit, which is constituted by the series combination of an inductance L and a resistance R, the capacity C being connected in the circuit arrangement shown in Fig. 3 in parallel with the resistance R, and in the circuit'arrangement shown in Fig. 4 in parallel with the inductance L.
  • a ca pacity C connected in parallel with part of the impedance of the anode circuit, which is constituted by the series combination of an inductance L and a resistance R, the capacity C being connected in the circuit arrangement shown in Fig. 3 in parallel with the resistance R, and in the circuit'arrangement shown in Fig. 4 in parallel with the inductance L.
  • the capacity C may be connected in parallel with part of theresistance- R and/or with part of'the inductance L. f f
  • the frequency characteris tie is possessed of a few maximum or minimum values. These maximum and minimum values may be used in certain cases for the purpose either of increasing the range of frequencies transmitted or of obtaining higher amplification.
  • a circuit arrangement for amplifying electric oscillations comprising a plurality of vacuum tubes, at least one of said tubes having an anode circuit including an inductance and an ohmic resistance connected in series, and a second inductance and a condenser connected in series across said ohmic resistance, the circuit elements in said anode circuit being so chosen that in the equation representing the ratio of the amplification at an arbitrary frequency V01 to the amplification at a second and lower frequency V0 V l.+c w +b ti tc w -td a wherein the cocmcients cm, In, 11 are functions of said circuit elements at the frequency Vw and the coefficients (12, b2, 02, d2 are functions of the said circuit elements at the frequency V0, the coefficients of the terms of equal order in the numerator and denominator being substantially equal to each'ether andthe coefficient 112 being as small as possible whereby the response of said circuit is substantially flat over the band between said two frequencies.
  • a circuit arrangement for amplifying electrical oscillations having input and output terminals and comprising a vacuum tube having at least an anode a cathode and a control grid, said control grid and cathode being connected to said input terminals, 2. series connection of an inductance and an ohmic resistance connected between said anode and a source of anode potential, said inductance being adjacent said anode. a second series connection of an inductance and a condenser connected in parallel with-said ohmic resistance,a second. condenser connected between said anode and one of said output terminals, and
  • the other of said output terminals being connected to said cathode, the elements in said anode circuit being so dimensioned that the response of said amplifier is substantially uniform over a Wide band of frequencies.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Amplifiers (AREA)
US107920A 1935-11-11 1936-10-28 Amplifier circuit Expired - Lifetime US2202361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE469791X 1935-11-11

Publications (1)

Publication Number Publication Date
US2202361A true US2202361A (en) 1940-05-28

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ID=6541058

Family Applications (1)

Application Number Title Priority Date Filing Date
US107920A Expired - Lifetime US2202361A (en) 1935-11-11 1936-10-28 Amplifier circuit

Country Status (4)

Country Link
US (1) US2202361A (zh)
BE (1) BE418329A (zh)
FR (2) FR469791A (zh)
GB (1) GB469791A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587617A (en) * 1947-05-29 1952-03-04 Faximile Inc Distortion compensating device for facsimile equipment
FR2651936A1 (fr) * 1989-09-13 1991-03-15 Mitsubishi Electric Corp Amplificateur a transistor a effet de champ, notamment utilise dans une bande micro-onde.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975551C (de) * 1940-03-17 1962-01-11 Socony Mobil Oil Company Aufnahmeeinrichtung fuer seismische Bodenwellen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587617A (en) * 1947-05-29 1952-03-04 Faximile Inc Distortion compensating device for facsimile equipment
FR2651936A1 (fr) * 1989-09-13 1991-03-15 Mitsubishi Electric Corp Amplificateur a transistor a effet de champ, notamment utilise dans une bande micro-onde.
US5089790A (en) * 1989-09-13 1992-02-18 Mitsubishi Denki Kabushiki Kaisha Field effect transistor amplifier

Also Published As

Publication number Publication date
FR813226A (zh) 1937-05-28
FR469791A (fr) 1914-08-10
BE418329A (zh)
GB469791A (en) 1937-08-03

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