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GB1414787A - Alternating current amplifying arrangements - Google Patents

Alternating current amplifying arrangements

Info

Publication number
GB1414787A
GB1414787A GB3438572A GB3438572A GB1414787A GB 1414787 A GB1414787 A GB 1414787A GB 3438572 A GB3438572 A GB 3438572A GB 3438572 A GB3438572 A GB 3438572A GB 1414787 A GB1414787 A GB 1414787A
Authority
GB
United Kingdom
Prior art keywords
amplifier
distortion
output
delay
parallel combination
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
GB3438572A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB3438572A priority Critical patent/GB1414787A/en
Priority to AU58354/73A priority patent/AU472817B2/en
Publication of GB1414787A publication Critical patent/GB1414787A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
    • H03F3/58—Amplifiers using transit-time effect in tubes or semiconductor devices using travelling-wave tubes
    • 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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3276—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using the nonlinearity inherent to components, e.g. a diode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/198—A hybrid coupler being used as coupling circuit between stages of an amplifier circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

1414787 Amplifying circuits MARCONI CO Ltd 18 May 1973 [22 July 1972] 34385/72 Heading H3W An A.C. amplifying arrangement includes an A.C. amplifier 2, the input channel to which is provided with the parallel combination of a non-linear device 4 having substantially the same distortion charactersitic as the amplifier 2, and a delay retwork 5 having substantially the same delay time as the non-linear device 4, whereby in operation the parallel combination provides an output having distortion substantially equal to but opposite in character to that produced by the amplifier 2. In the embodiment, amplifier 2 is a travelling wave tube, the input at terminal 1 being divided by power splitting coupler 7 between a low power amplifier 4 and a passive delay line 5 having twice the output level of the amplifier 4, so that by subtraction of the outputs in circuit 6, which may be a magic-Tee hybrid coupler, the desired distortion characteristic is obtained (Figs. 2(a)-2(c), not shown). Alternatively, the delay line 5 may be replaced by an amplifier similar to amplifier 4, run at a low level so as to give little distortion, the dividing and combining networks 7, 6 being of such unequal ratio as to give the desired distorted output.
GB3438572A 1972-07-22 1972-07-22 Alternating current amplifying arrangements Expired GB1414787A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3438572A GB1414787A (en) 1972-07-22 1972-07-22 Alternating current amplifying arrangements
AU58354/73A AU472817B2 (en) 1972-07-22 1973-07-20 Improvements in or relating to alternating current amplifying arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3438572A GB1414787A (en) 1972-07-22 1972-07-22 Alternating current amplifying arrangements

Publications (1)

Publication Number Publication Date
GB1414787A true GB1414787A (en) 1975-11-19

Family

ID=10364997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3438572A Expired GB1414787A (en) 1972-07-22 1972-07-22 Alternating current amplifying arrangements

Country Status (2)

Country Link
AU (1) AU472817B2 (en)
GB (1) GB1414787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423917A1 (en) * 1978-04-17 1979-11-16 Kokusai Denshin Denwa Co Ltd NON-LINEARITY COMPENSATION CIRCUIT FOR HIGH FREQUENCY AMPLIFIERS
EP0149319A2 (en) * 1984-01-19 1985-07-24 The Marconi Company Limited High frequency circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423917A1 (en) * 1978-04-17 1979-11-16 Kokusai Denshin Denwa Co Ltd NON-LINEARITY COMPENSATION CIRCUIT FOR HIGH FREQUENCY AMPLIFIERS
US4283684A (en) * 1978-04-17 1981-08-11 Kokusai Denshin Denwa Co., Ltd. Non-linearity compensating circuit for high-frequency amplifiers
EP0149319A2 (en) * 1984-01-19 1985-07-24 The Marconi Company Limited High frequency circuit
EP0149319A3 (en) * 1984-01-19 1987-09-02 The Marconi Company Limited High frequency circuit

Also Published As

Publication number Publication date
AU5835473A (en) 1975-01-23
AU472817B2 (en) 1976-06-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee