GB201004061D0 - Improved band-pass feedback amplifier circuits - Google Patents

Improved band-pass feedback amplifier circuits

Info

Publication number
GB201004061D0
GB201004061D0 GBGB1004061.6A GB201004061A GB201004061D0 GB 201004061 D0 GB201004061 D0 GB 201004061D0 GB 201004061 A GB201004061 A GB 201004061A GB 201004061 D0 GB201004061 D0 GB 201004061D0
Authority
GB
United Kingdom
Prior art keywords
amplifier circuits
feedback amplifier
improved band
pass feedback
pass
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.)
Withdrawn
Application number
GBGB1004061.6A
Other versions
GB2478585A (en
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.)
Chandler Stephen A G
Original Assignee
Chandler Stephen A G
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 Chandler Stephen A G filed Critical Chandler Stephen A G
Priority to GB1004061A priority Critical patent/GB2478585A/en
Publication of GB201004061D0 publication Critical patent/GB201004061D0/en
Publication of GB2478585A publication Critical patent/GB2478585A/en
Withdrawn legal-status Critical Current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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/345—Negative-feedback-circuit arrangements with or without positive feedback using hybrid or directional couplers
    • 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
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • 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
    • H03F1/3252—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using multiple parallel paths between input and output
    • 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
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • 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
    • H03F1/3294—Acting on the real and imaginary components of the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/204—A hybrid coupler being used at the output of an amplifier circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Amplifiers (AREA)
GB1004061A 2010-03-11 2010-03-11 An RF amplifier linearised by RF feedback, and having a loop filter resonator of enhanced Q Withdrawn GB2478585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1004061A GB2478585A (en) 2010-03-11 2010-03-11 An RF amplifier linearised by RF feedback, and having a loop filter resonator of enhanced Q

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1004061A GB2478585A (en) 2010-03-11 2010-03-11 An RF amplifier linearised by RF feedback, and having a loop filter resonator of enhanced Q

Publications (2)

Publication Number Publication Date
GB201004061D0 true GB201004061D0 (en) 2010-04-28
GB2478585A GB2478585A (en) 2011-09-14

Family

ID=42261425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1004061A Withdrawn GB2478585A (en) 2010-03-11 2010-03-11 An RF amplifier linearised by RF feedback, and having a loop filter resonator of enhanced Q

Country Status (1)

Country Link
GB (1) GB2478585A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380752A (en) * 2018-04-10 2019-10-25 恩智浦有限公司 Wireless device
CN111034041A (en) * 2017-05-24 2020-04-17 安乐泰克有限公司 Apparatus and method for controlling resonator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2494652A (en) * 2011-09-14 2013-03-20 Stephen Anthony Gerard Chandler A transmitter amplifier with linearising RF feedback and automatic control of resonator Q, resonator frequency, loop phase, and loop gain
RU2018122759A (en) 2015-11-23 2019-12-26 Анлотек Лимитед TUNABLE FILTER
TWI721048B (en) * 2016-11-28 2021-03-11 英商安諾特克有限公司 Variable analog filter, multipole filter, and method of filtering an analog electromagnetic signal
US11277110B2 (en) 2019-09-03 2022-03-15 Anlotek Limited Fast frequency switching in a resonant high-Q analog filter
CN115427911A (en) 2019-12-05 2022-12-02 安乐泰克有限公司 Using stable tunable active feedback analog filter in frequency synthesis
US11876499B2 (en) 2020-06-15 2024-01-16 Anlotek Limited Tunable bandpass filter with high stability and orthogonal tuning
RU2748610C1 (en) * 2020-12-08 2021-05-28 федеральное государственное бюджетное образовательное учреждение высшего образования «Донской государственный технический университет» (ДГТУ) Fourth-order broadband bandpass filter with single input and paraphase output
US11955942B2 (en) 2021-02-27 2024-04-09 Anlotek Limited Active multi-pole filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6859097B2 (en) * 2000-05-16 2005-02-22 Stephen Anthony Gerard Chandler Radio frequency feedback amplifier circuits
US7433668B2 (en) * 2004-12-23 2008-10-07 Lucent Technologies Inc. Controlling Q-factor of filters
US7400203B2 (en) * 2006-08-03 2008-07-15 Broadcom Corporation Circuit with Q-enhancement cell having feedback loop
US7884680B2 (en) * 2008-06-30 2011-02-08 Infineon Technologies Ag Dynamically adjustable Q-factors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111034041A (en) * 2017-05-24 2020-04-17 安乐泰克有限公司 Apparatus and method for controlling resonator
CN111034041B (en) * 2017-05-24 2023-10-31 安乐泰克有限公司 Apparatus and method for controlling resonator
CN110380752A (en) * 2018-04-10 2019-10-25 恩智浦有限公司 Wireless device

Also Published As

Publication number Publication date
GB2478585A (en) 2011-09-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)