GB2254505B - Apparatus and method for reducing distortion in amplification - Google Patents

Apparatus and method for reducing distortion in amplification

Info

Publication number
GB2254505B
GB2254505B GB9209720A GB9209720A GB2254505B GB 2254505 B GB2254505 B GB 2254505B GB 9209720 A GB9209720 A GB 9209720A GB 9209720 A GB9209720 A GB 9209720A GB 2254505 B GB2254505 B GB 2254505B
Authority
GB
United Kingdom
Prior art keywords
amplification
reducing distortion
distortion
reducing
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 - Fee Related
Application number
GB9209720A
Other versions
GB2254505A (en
GB9209720D0 (en
Inventor
Peter Blakeborough Kenington
Mark Antony Beach
Andrew Bateman
Joseph Peter Mcgeehan
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.)
BTG International Ltd
Original Assignee
British Technology Group 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
Priority claimed from GB909009295A external-priority patent/GB9009295D0/en
Application filed by British Technology Group Ltd filed Critical British Technology Group Ltd
Priority to GB9209720A priority Critical patent/GB2254505B/en
Publication of GB9209720D0 publication Critical patent/GB9209720D0/en
Priority to US07/931,132 priority patent/US5334946A/en
Publication of GB2254505A publication Critical patent/GB2254505A/en
Application granted granted Critical
Publication of GB2254505B publication Critical patent/GB2254505B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H03F1/3235—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction using a pilot signal
    • 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)
GB9209720A 1990-04-25 1992-05-05 Apparatus and method for reducing distortion in amplification Expired - Fee Related GB2254505B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9209720A GB2254505B (en) 1990-04-25 1992-05-05 Apparatus and method for reducing distortion in amplification
US07/931,132 US5334946A (en) 1990-04-25 1992-08-14 Apparatus and method for reducing distortion in amplification

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909009295A GB9009295D0 (en) 1990-04-25 1990-04-25 Apparatus and method for reducing distortion in amplification
GB9209720A GB2254505B (en) 1990-04-25 1992-05-05 Apparatus and method for reducing distortion in amplification

Publications (3)

Publication Number Publication Date
GB9209720D0 GB9209720D0 (en) 1992-06-17
GB2254505A GB2254505A (en) 1992-10-07
GB2254505B true GB2254505B (en) 1993-05-05

Family

ID=26296992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9209720A Expired - Fee Related GB2254505B (en) 1990-04-25 1992-05-05 Apparatus and method for reducing distortion in amplification

Country Status (1)

Country Link
GB (1) GB2254505B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296615A (en) * 1994-12-21 1996-07-03 Univ Bristol Distortion and noise reduction in wide band feedforward amplifier/mixer
US5742201A (en) * 1996-01-30 1998-04-21 Spectrian Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier
US5892397A (en) * 1996-03-29 1999-04-06 Spectrian Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude
GB9814400D0 (en) * 1998-07-02 1998-09-02 Nokia Telecommunications Oy Amplifier circuitry
US6166601A (en) * 1999-01-07 2000-12-26 Wiseband Communications Ltd. Super-linear multi-carrier power amplifier
US20050200408A1 (en) * 2004-03-15 2005-09-15 Benjamin James A. Method and apparatus for feed forward linearization of wideband RF amplifiers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885551A (en) * 1988-10-31 1989-12-05 American Telephone And Telegraph Company At&T Bell Laboratories Feed forward linear amplifier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885551A (en) * 1988-10-31 1989-12-05 American Telephone And Telegraph Company At&T Bell Laboratories Feed forward linear amplifier

Also Published As

Publication number Publication date
GB2254505A (en) 1992-10-07
GB9209720D0 (en) 1992-06-17

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Legal Events

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

Effective date: 20050425