US2315296A - High frequency amplifier circuits - Google Patents

High frequency amplifier circuits Download PDF

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Publication number
US2315296A
US2315296A US333088A US33308840A US2315296A US 2315296 A US2315296 A US 2315296A US 333088 A US333088 A US 333088A US 33308840 A US33308840 A US 33308840A US 2315296 A US2315296 A US 2315296A
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US
United States
Prior art keywords
cathode
grid
circuit
damping
input
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
US333088A
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English (en)
Inventor
Strutt Maximiliaan Julius Otto
Ziel Aldert Van Der
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
Application granted granted Critical
Publication of US2315296A publication Critical patent/US2315296A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/10—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of amplifying elements with multiple electrode connections

Definitions

  • This invention relates to circuit arrangements for amplifying electric oscillation, use being made of an electron discharge tube having at least a cathode, a control grid and an anode, and the at least two leads,-
  • numeral I designates an amplifier tube comprising a cathode 2, a c ntrol grid 3, auxiliary electrodes 4 to Ban an anode I.
  • the cathode is provided with two leads having-included in them impedances' shown in this figure as inductances L1 and L2. Between 8-of the cathode which is connected to the cathode lead included in the control grid circuit there is a capacity C1. Between the control grid 8 and the point 9 of the cathode lead, included in the anode circuit that .is-notconnected to the cathode, there is a capacity 0:.
  • Vi designates'the input voltage-to be amplified which is supplied between the input ter- II and H. For the sake of simplicity the input and output circuits themselves and the supply sources of direct current are not shown.
  • the tube I contains a secondary emission cathode having a mutual conductance of the secondary emission current going to the anode as a function 01' the control grid voltage equal to -81; and that this auxiliary cathode is connected, for the put circuit.
  • the cases where an auxiliary cathode is notpresentcan be derived from the general is obtained w th tubes hag'ifiaat least.
  • theiinvention makes available the fact that between'the admittance Yo w'hichoccurs between the input terminals l0 and .II of the discharge tube and the values w, Sh, Sr, L1, L2, 01'
  • the angular irequency of theoscillations to be I This impedance is negative, and can be used with ing the damping due to the transit time of the electrons, and in addition the damping due to the preceding amplifier tube, and/or the dampbetween the input terminals Ill and I I mgince the damping of the input circuit is approximately also proportional ductance Sr.
  • the value of In must be such in connection with the The capacity C2 may be the anodeductances can obviously be increased artificially in order to obtain the desired efiect.
  • formula (1) formula (2) it is evident that in the use of a secondary emission tube, due to themutual conductance of the secondary emission current, the same means permit of obtaining an appreciably higher damping-reducing effect than with a tube without such an auxiliary cathode.
  • the two cathode leads are always connected to different sides of the cathode. sential, but thetwo leads may also be connected, 'ior example in common, to one point of the cathode.
  • the invention can be used without difliculty for tubes comprising three or more cathode leads, and in this case, for example in the event of three cathode supply conductors, the third one is used for other purposes.
  • a circuit for ,the amplification of high frequencies comprising aneiectron discharge tube values of the capacity 02 and of S: that the damping reducing eflect according to formula (2) is equal to, erexceeds, the damping due to the transit time of the electrons.
  • Fig. 2 Such a circuit arrangement is shown in which Ca represents a filter condenser.
  • In represents the inductance of the lead and according to the invention it is in this case necessary for C: to beincreased by means of supplementary capacities in such manner that the value of Yo according to formula (2) is equal to, or-exceeds. the damping due to the transit time of the electrons.
  • the tube is provided with a secondary emission cathode the inductance L1 and the capacity C1 deploy a part so that this should be taken into account.
  • C designates the source oi supply voltage for the secondary emission cathode i.
  • C may be. ior. example, the control gridrcathode capacity and C: the screening gridties being deliberately provided.
  • L1 and L2 respectively may be such that according to formula (1) 10' is equal to, or exceeds, the damping due to the finite transit time of the electrons, As before,
  • the inductances of the cathode leads themselves may be chosen to constitute Li and 1a and in this case the capacities-C1 and/or C: are incontrol grid capacity without any other capaciprovided with atv least a cathode having two external terminals, a signal input grid and an anode, the cathode having a lead connected to each of its externalterminals, input and output circuits connected respectively to the input grid and to the anode. the grid return of the input circuit being connected to one o!
  • the cathode leads the plate return of the output circuit being connected to the other cathode lead, a condenser connected from the signal input grid to a point having the same radio frequency potential as said plate return, and an inductance included in the cathode lead to which the plate return is connected, the condenser and inductance being chosen of such value that damping between the terminals of the input circuit is substantially zero.
  • a circuit for the amplification of high frequencies comprising an electron discharge tube provided with at least a cathode having two external terminals, a signal input grid and an anode, the cathode having a lead connected to each of its external terminals, input and output circuits connected respectively to the irput grid and to the. anode, the grid return of the input circuit being connected to one of the cathode leads, the plate return of the output circuit being connected to the other cathode lead, an inductance included in the latter cathode lead, and a condenser between the control grid and the end of said inductance remote from said cathode, the product of the values of said increased in such manner by deliberately provided supplementary capacities that the desired effect according to the invention is obtained.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • General Induction Heating (AREA)
US333088A 1939-07-25 1940-05-03 High frequency amplifier circuits Expired - Lifetime US2315296A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL217640X 1939-07-25
NL97355A NL65108C (ko) 1939-07-25 1940-03-21
NL260340X 1940-03-26

Publications (1)

Publication Number Publication Date
US2315296A true US2315296A (en) 1943-03-30

Family

ID=27351264

Family Applications (4)

Application Number Title Priority Date Filing Date
US333088A Expired - Lifetime US2315296A (en) 1939-07-25 1940-05-03 High frequency amplifier circuits
US374805A Expired - Lifetime US2293415A (en) 1939-07-25 1941-01-17 High frequency amplifier circuit
US374804A Expired - Lifetime US2293414A (en) 1939-07-25 1941-01-17 High frequency amplifier circuit
US374960A Expired - Lifetime US2314958A (en) 1939-07-25 1941-01-18 High frequency amplifier circuit

Family Applications After (3)

Application Number Title Priority Date Filing Date
US374805A Expired - Lifetime US2293415A (en) 1939-07-25 1941-01-17 High frequency amplifier circuit
US374804A Expired - Lifetime US2293414A (en) 1939-07-25 1941-01-17 High frequency amplifier circuit
US374960A Expired - Lifetime US2314958A (en) 1939-07-25 1941-01-18 High frequency amplifier circuit

Country Status (6)

Country Link
US (4) US2315296A (ko)
BE (1) BE440196A (ko)
CH (1) CH217640A (ko)
DE (1) DE741857C (ko)
GB (1) GB624602A (ko)
NL (1) NL65108C (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419793A (en) * 1944-03-08 1947-04-29 Rca Corp Ultra high frequency electron discharge device circuit
US2579789A (en) * 1950-04-07 1951-12-25 Avco Mfg Corp Tuner for television receivers

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE441205A (ko) * 1940-01-31
NL57644C (ko) * 1940-12-30
FR868519A (fr) * 1941-07-31 1942-01-05 Philips Nv Montage amplificateur d'oscillations électriques
BE471791A (ko) * 1945-08-27
US2662934A (en) * 1949-02-08 1953-12-15 Westinghouse Air Brake Co Vacuum tube amplifier circuits for coded carrier current
US2811640A (en) * 1953-06-05 1957-10-29 Standard Coil Prod Co Inc Ultra high frequency signal generation
CH345925A (de) * 1955-05-20 1960-04-30 Egyesuelt Izzolampa Schaltungsanordnung zum Verstärken von Spannungen sehr hoher Frequenz
US3204194A (en) * 1962-12-17 1965-08-31 Motorola Inc Amplifier neutralization by r. f. feedback
US9825597B2 (en) 2015-12-30 2017-11-21 Skyworks Solutions, Inc. Impedance transformation circuit for amplifier
US10062670B2 (en) 2016-04-18 2018-08-28 Skyworks Solutions, Inc. Radio frequency system-in-package with stacked clocking crystal
TWI800014B (zh) 2016-12-29 2023-04-21 美商天工方案公司 前端系統及相關裝置、積體電路、模組及方法
US10515924B2 (en) 2017-03-10 2019-12-24 Skyworks Solutions, Inc. Radio frequency modules

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687685C (de) * 1936-05-14 1940-02-03 Telefunken Gmbh Einroehrenschaltung zum Verstaerken oder Empfangen von kurzen Wellen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419793A (en) * 1944-03-08 1947-04-29 Rca Corp Ultra high frequency electron discharge device circuit
US2579789A (en) * 1950-04-07 1951-12-25 Avco Mfg Corp Tuner for television receivers

Also Published As

Publication number Publication date
US2293414A (en) 1942-08-18
GB624602A (en) 1949-06-13
US2314958A (en) 1943-03-30
CH217640A (de) 1941-10-31
DE741857C (de) 1953-08-03
BE440196A (ko) 1941-01-31
NL65108C (ko) 1950-01-16
US2293415A (en) 1942-08-18

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