GB2107540B - Feedforward amplifiers - Google Patents

Feedforward amplifiers

Info

Publication number
GB2107540B
GB2107540B GB08130976A GB8130976A GB2107540B GB 2107540 B GB2107540 B GB 2107540B GB 08130976 A GB08130976 A GB 08130976A GB 8130976 A GB8130976 A GB 8130976A GB 2107540 B GB2107540 B GB 2107540B
Authority
GB
United Kingdom
Prior art keywords
feedforward amplifiers
feedforward
amplifiers
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
GB08130976A
Other versions
GB2107540A (en
Inventor
Roger Edwin John Gerard
Graeme Nigel Hobbs
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 GB08130976A priority Critical patent/GB2107540B/en
Publication of GB2107540A publication Critical patent/GB2107540A/en
Application granted granted Critical
Publication of GB2107540B publication Critical patent/GB2107540B/en
Expired legal-status Critical Current

Links

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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3212—Using a control circuit to adjust amplitude and phase of a signal in a signal path

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
GB08130976A 1981-10-14 1981-10-14 Feedforward amplifiers Expired GB2107540B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08130976A GB2107540B (en) 1981-10-14 1981-10-14 Feedforward amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08130976A GB2107540B (en) 1981-10-14 1981-10-14 Feedforward amplifiers

Publications (2)

Publication Number Publication Date
GB2107540A GB2107540A (en) 1983-04-27
GB2107540B true GB2107540B (en) 1985-06-26

Family

ID=10525148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08130976A Expired GB2107540B (en) 1981-10-14 1981-10-14 Feedforward amplifiers

Country Status (1)

Country Link
GB (1) GB2107540B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678976A1 (en) 1990-04-25 1995-10-25 Btg International Limited Apparatus and method for reducing distortion in amplification

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591800A (en) * 1984-10-01 1986-05-27 Motorola, Inc. Linear power amplifier feedback improvement
US4580105A (en) * 1985-01-25 1986-04-01 At&T Bell Laboratories Automatic reduction of intermodulation products in high power linear amplifiers
US4879519A (en) * 1988-10-31 1989-11-07 American Telephone And Telegraph Company, At&T Bell Labs Predistortion compensated linear amplifier
US4885551A (en) * 1988-10-31 1989-12-05 American Telephone And Telegraph Company At&T Bell Laboratories Feed forward linear amplifier
US5051704A (en) * 1990-02-06 1991-09-24 Motorola, Inc. Feedforward distortion cancellation circuit
US5334946A (en) * 1990-04-25 1994-08-02 British Technology Group Limited Apparatus and method for reducing distortion in amplification
US5119040A (en) * 1991-01-04 1992-06-02 Motorola, Inc. Method and apparatus for optimizing the performance of a power amplifier circuit
US5148117A (en) * 1991-11-25 1992-09-15 American Nucleonics Corporation Adaptive feed-forward method and apparatus for amplifier noise reduction
WO1993019521A1 (en) * 1992-03-19 1993-09-30 Fujitsu Limited Feedforward amplifier
DE69614284T2 (en) * 1995-02-02 2002-01-10 Nippon Telegraph & Telephone Distortion correction device
FI105625B (en) 1997-10-29 2000-09-15 Nokia Networks Oy Adjustment method and adjustment arrangement
FI104021B1 (en) * 1997-10-29 1999-10-29 Nokia Networks Oy Adaptation procedure and amplifier arrangement
JP2000004124A (en) * 1998-06-17 2000-01-07 Nec Corp Feedforward amplifier
US7142054B2 (en) 2004-05-06 2006-11-28 Raytheon Company Amplifying signals using a quadrature coupled amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678976A1 (en) 1990-04-25 1995-10-25 Btg International Limited Apparatus and method for reducing distortion in amplification

Also Published As

Publication number Publication date
GB2107540A (en) 1983-04-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20001014