JPS503205A - - Google Patents

Info

Publication number
JPS503205A
JPS503205A JP49023779A JP2377974A JPS503205A JP S503205 A JPS503205 A JP S503205A JP 49023779 A JP49023779 A JP 49023779A JP 2377974 A JP2377974 A JP 2377974A JP S503205 A JPS503205 A JP S503205A
Authority
JP
Japan
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.)
Granted
Application number
JP49023779A
Other languages
Japanese (ja)
Other versions
JPS5645322B2 (en:Method
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 filed Critical
Publication of JPS503205A publication Critical patent/JPS503205A/ja
Publication of JPS5645322B2 publication Critical patent/JPS5645322B2/ja
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
JP2377974A 1973-03-02 1974-03-02 Expired JPS5645322B2 (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00337670A US3815040A (en) 1973-03-02 1973-03-02 Feed-forward, error-correcting systems

Publications (2)

Publication Number Publication Date
JPS503205A true JPS503205A (en:Method) 1975-01-14
JPS5645322B2 JPS5645322B2 (en:Method) 1981-10-26

Family

ID=23321509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2377974A Expired JPS5645322B2 (en:Method) 1973-03-02 1974-03-02

Country Status (9)

Country Link
US (1) US3815040A (en:Method)
JP (1) JPS5645322B2 (en:Method)
BE (1) BE811759A (en:Method)
CA (1) CA989021A (en:Method)
DE (1) DE2409842A1 (en:Method)
FR (1) FR2220110B1 (en:Method)
GB (1) GB1449723A (en:Method)
NL (1) NL7402816A (en:Method)
SE (1) SE391095B (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123420U (en:Method) * 1976-03-17 1977-09-20
JPH0496508A (ja) * 1990-08-13 1992-03-27 Nec Corp 歪補償回路

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906401A (en) * 1974-09-03 1975-09-16 Bell Telephone Labor Inc Feedforward error correction in interferometer modulators
SE385177B (sv) * 1975-08-28 1976-06-08 Ericsson Telefon Ab L M Framkopplad forsterkare
GB1561052A (en) * 1975-09-24 1980-02-13 Siemens Ag Transistor power amplifiers
US3993961A (en) * 1975-10-31 1976-11-23 Bell Telephone Laboratories, Incorporated Overcompensated feedforward method and apparatus using overdistorted main amplifiers
US4028634A (en) * 1976-02-11 1977-06-07 Bell Telephone Laboratories, Incorporated Feed-forward amplifier with simple resistive coupling
US4207527A (en) * 1978-04-05 1980-06-10 Rca Corporation Pre-processing apparatus for FM stereo overshoot elimination
US4207526A (en) * 1978-04-05 1980-06-10 Rca Corporation Pre-processing apparatus for FM stereo overshoot elimination
DE2915947A1 (de) * 1979-04-20 1980-11-06 Siemens Ag Schaltungsanordnung zur verminderung der amplitudenabhaengigen verzerrungen in ueberlagerungsempfaengern
FR2469826A1 (fr) * 1979-11-14 1981-05-22 Lecoy Pierre Boucle de detection d'erreur notamment pour circuit de correction de linearite
US4447790A (en) * 1980-10-13 1984-05-08 Nippon Columbia Kabushikikaisha Distortion eliminating circuit
JPS57186155U (en:Method) * 1981-05-19 1982-11-26
DE3220252C2 (de) * 1982-05-28 1985-09-12 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Beseitigung von Verzerrungen in Verstärkern
FR2532491A1 (fr) * 1982-08-24 1984-03-02 Thomson Csf Dispositif de linearisation pour amplificateur haute frequence
US5065110A (en) * 1990-05-02 1991-11-12 Teledyne Mec Feed-forward amplifier including phase correction
US5077532A (en) * 1990-12-17 1991-12-31 Motorola, Inc. Feed forward distortion minimization circuit
US5119040A (en) * 1991-01-04 1992-06-02 Motorola, Inc. Method and apparatus for optimizing the performance of a power amplifier circuit
US5307022A (en) * 1991-04-15 1994-04-26 Motorola, Inc. High dynamic range modulation independent feed forward amplifier network
US5130663A (en) * 1991-04-15 1992-07-14 Motorola, Inc. Feed forward amplifier network with frequency swept pilot tone
US5304945A (en) * 1993-04-19 1994-04-19 At&T Bell Laboratories Low-distortion feed-forward amplifier
US5621354A (en) * 1995-10-17 1997-04-15 Motorola, Inc. Apparatus and method for performing error corrected amplification in a radio frequency system
US5623227A (en) * 1995-10-17 1997-04-22 Motorola, Inc. Amplifier circuit and method of controlling an amplifier for use in a radio frequency communication system
US5768699A (en) * 1995-10-20 1998-06-16 Aml Communications, Inc. Amplifier with detuned test signal cancellation for improved wide-band frequency response
US5808512A (en) * 1997-01-31 1998-09-15 Ophir Rf, Inc. Feed forward amplifiers and methods
ATE513360T1 (de) * 2000-12-28 2011-07-15 Alcatel Lucent Xdsl klasse c-ab treiber
US6573792B1 (en) * 2001-12-13 2003-06-03 Motorola, Inc Feedforward amplifier
US7355470B2 (en) 2006-04-24 2008-04-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
ES2262427B1 (es) * 2005-03-23 2007-11-16 Angel Iglesias, S.A. Sistema para la medicion y monitorizacion de distorsion no lineal en dispositivos de linealizacion.
ITRM20050415A1 (it) * 2005-08-03 2007-02-04 Porra Secondo Apparato amplificatore audio di potenza.
US20130078934A1 (en) 2011-04-08 2013-03-28 Gregory Rawlins Systems and Methods of RF Power Transmission, Modulation, and Amplification
US8013675B2 (en) 2007-06-19 2011-09-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US7937106B2 (en) 2006-04-24 2011-05-03 ParkerVision, Inc, Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US7620129B2 (en) 2007-01-16 2009-11-17 Parkervision, Inc. RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals
WO2008144017A1 (en) 2007-05-18 2008-11-27 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
WO2009005768A1 (en) 2007-06-28 2009-01-08 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
WO2009145887A1 (en) 2008-05-27 2009-12-03 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
JP6174574B2 (ja) 2011-06-02 2017-08-02 パーカーヴィジョン インコーポレイテッド アンテナ制御
EP4538829A3 (en) 2013-09-17 2025-06-25 Parkervision, Inc. Method, apparatus and system for rendering an information bearing function of time

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835869A (en) * 1955-06-21 1958-05-20 Rca Corp Television transmitter with improved amplitude linearity
GB802218A (en) * 1955-10-21 1958-10-01 Standard Telephones Cables Ltd Circuit for reducing the effect of delay distortion of amplifier systems on angularly modulated waves
DE1010589B (de) * 1956-05-15 1957-06-19 Telefunken Gmbh Senderschaltung mit Amplituden-modulation einer Hochfrequenzschwingung
NL109535C (en:Method) * 1961-05-16
US3348126A (en) * 1964-09-25 1967-10-17 Maxime G Kaufman Phase rate compensator
US3365674A (en) * 1964-11-09 1968-01-23 Northern Electric Co Distortion reducing circuit
CA850263A (en) * 1968-10-09 1970-08-25 Northern Electric Company Limited Threshold extension demodulator
US3568078A (en) * 1968-12-23 1971-03-02 Radiation Inc Fm demodulators with signal error removal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123420U (en:Method) * 1976-03-17 1977-09-20
JPH0496508A (ja) * 1990-08-13 1992-03-27 Nec Corp 歪補償回路

Also Published As

Publication number Publication date
US3815040A (en) 1974-06-04
GB1449723A (en) 1976-09-15
FR2220110A1 (en:Method) 1974-09-27
BE811759A (fr) 1974-07-01
CA989021A (en) 1976-05-11
SE391095B (sv) 1977-01-31
FR2220110B1 (en:Method) 1976-12-10
NL7402816A (en:Method) 1974-09-04
JPS5645322B2 (en:Method) 1981-10-26
DE2409842A1 (de) 1974-09-12

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