GB2326297B - Radio frequency signal processing and amplification in cartesian loop amplifiers - Google Patents

Radio frequency signal processing and amplification in cartesian loop amplifiers

Info

Publication number
GB2326297B
GB2326297B GB9711935A GB9711935A GB2326297B GB 2326297 B GB2326297 B GB 2326297B GB 9711935 A GB9711935 A GB 9711935A GB 9711935 A GB9711935 A GB 9711935A GB 2326297 B GB2326297 B GB 2326297B
Authority
GB
United Kingdom
Prior art keywords
amplification
signal processing
radio frequency
frequency signal
cartesian loop
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
GB9711935A
Other versions
GB2326297A (en
GB9711935D0 (en
Inventor
Richard Hillum
Ian Stuart Parry
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.)
Securicor Wireless Technology Ltd
Linear Modulation Technology Ltd
Original Assignee
Securicor Wireless Technology Ltd
Linear Modulation Technology 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 Securicor Wireless Technology Ltd, Linear Modulation Technology Ltd filed Critical Securicor Wireless Technology Ltd
Priority to GB9711935A priority Critical patent/GB2326297B/en
Publication of GB9711935D0 publication Critical patent/GB9711935D0/en
Publication of GB2326297A publication Critical patent/GB2326297A/en
Application granted granted Critical
Publication of GB2326297B publication Critical patent/GB2326297B/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
    • H03F1/3241—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
    • 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
    • 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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0441—Circuits with power amplifiers with linearisation using feed-forward

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
GB9711935A 1997-06-09 1997-06-09 Radio frequency signal processing and amplification in cartesian loop amplifiers Expired - Fee Related GB2326297B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9711935A GB2326297B (en) 1997-06-09 1997-06-09 Radio frequency signal processing and amplification in cartesian loop amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9711935A GB2326297B (en) 1997-06-09 1997-06-09 Radio frequency signal processing and amplification in cartesian loop amplifiers

Publications (3)

Publication Number Publication Date
GB9711935D0 GB9711935D0 (en) 1997-08-06
GB2326297A GB2326297A (en) 1998-12-16
GB2326297B true GB2326297B (en) 2002-03-20

Family

ID=10813828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9711935A Expired - Fee Related GB2326297B (en) 1997-06-09 1997-06-09 Radio frequency signal processing and amplification in cartesian loop amplifiers

Country Status (1)

Country Link
GB (1) GB2326297B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0104535D0 (en) * 2001-02-23 2001-04-11 Univ Bristol Digital cartesian loop
JP3990401B2 (en) * 2002-06-19 2007-10-10 富士通株式会社 Transmitter
US8238848B2 (en) * 2007-06-20 2012-08-07 Telefonaktiebolaget Lm Ericsson (Publ) Feed forward noise reduction in a transmitter

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020621A1 (en) * 1992-04-02 1993-10-14 Stanford Telecommunications, Inc. Method and apparatus for intermodulation noise suppression in rf power amplifiers
WO1994005078A1 (en) * 1992-08-24 1994-03-03 Telefonaktiebolaget Lm Ericsson Apparatus for compensating of phase rotation in a final amplifier stage
US5381108A (en) * 1992-11-16 1995-01-10 Linear Modulation Technology Limited Automatic calibration of the quadrature balance within a cartesian amplifier
GB2281668A (en) * 1993-08-20 1995-03-08 Motorola Inc Radio transmitter with power amplifier linearizer
GB2282290A (en) * 1993-09-09 1995-03-29 Motorola Israel Ltd Radio transmitter with power amplifier linearizer.
EP0648012A1 (en) * 1993-09-29 1995-04-12 Linear Modulation Technology Ltd Power control for cartesian amplifiers
WO1995024766A1 (en) * 1994-03-11 1995-09-14 Motorola, Inc. Radio transmitter power amplifier calibration
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
WO1996036131A1 (en) * 1995-05-12 1996-11-14 Telefonaktiebolaget Lm Ericsson (Publ) Spurious signal reduction in rf transmitter integrated circuits

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020621A1 (en) * 1992-04-02 1993-10-14 Stanford Telecommunications, Inc. Method and apparatus for intermodulation noise suppression in rf power amplifiers
WO1994005078A1 (en) * 1992-08-24 1994-03-03 Telefonaktiebolaget Lm Ericsson Apparatus for compensating of phase rotation in a final amplifier stage
US5381108A (en) * 1992-11-16 1995-01-10 Linear Modulation Technology Limited Automatic calibration of the quadrature balance within a cartesian amplifier
GB2281668A (en) * 1993-08-20 1995-03-08 Motorola Inc Radio transmitter with power amplifier linearizer
GB2282290A (en) * 1993-09-09 1995-03-29 Motorola Israel Ltd Radio transmitter with power amplifier linearizer.
EP0648012A1 (en) * 1993-09-29 1995-04-12 Linear Modulation Technology Ltd Power control for cartesian amplifiers
WO1995024766A1 (en) * 1994-03-11 1995-09-14 Motorola, Inc. Radio transmitter power amplifier calibration
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
WO1996036131A1 (en) * 1995-05-12 1996-11-14 Telefonaktiebolaget Lm Ericsson (Publ) Spurious signal reduction in rf transmitter integrated circuits

Also Published As

Publication number Publication date
GB2326297A (en) 1998-12-16
GB9711935D0 (en) 1997-08-06

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Legal Events

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

Effective date: 20050609