SG49311A1 - Method and apparatus for amplifying modulating and demodulating - Google Patents

Method and apparatus for amplifying modulating and demodulating

Info

Publication number
SG49311A1
SG49311A1 SG1996009042A SG1996009042A SG49311A1 SG 49311 A1 SG49311 A1 SG 49311A1 SG 1996009042 A SG1996009042 A SG 1996009042A SG 1996009042 A SG1996009042 A SG 1996009042A SG 49311 A1 SG49311 A1 SG 49311A1
Authority
SG
Singapore
Prior art keywords
demodulating
modulating
amplifying
amplifying modulating
Prior art date
Application number
SG1996009042A
Other languages
English (en)
Inventor
Andrew Bateman
Kam Yuen Chan
Original Assignee
Univ Bristol
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 Univ Bristol filed Critical Univ Bristol
Publication of SG49311A1 publication Critical patent/SG49311A1/en

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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0294—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using vector summing of two or more constant amplitude phase-modulated signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/02—Details
    • H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplifiers (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
SG1996009042A 1992-05-08 1993-05-10 Method and apparatus for amplifying modulating and demodulating SG49311A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB929209982A GB9209982D0 (en) 1992-05-08 1992-05-08 Method and apparatus for amplifying modulating and demodulating

Publications (1)

Publication Number Publication Date
SG49311A1 true SG49311A1 (en) 1998-05-18

Family

ID=10715222

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996009042A SG49311A1 (en) 1992-05-08 1993-05-10 Method and apparatus for amplifying modulating and demodulating

Country Status (8)

Country Link
US (1) US5719527A (ja)
EP (1) EP0639306B1 (ja)
JP (1) JPH07509106A (ja)
CA (1) CA2135304A1 (ja)
DE (1) DE69309922T2 (ja)
GB (2) GB9209982D0 (ja)
SG (1) SG49311A1 (ja)
WO (1) WO1993023921A1 (ja)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9313981D0 (en) * 1993-07-06 1993-08-18 Plessey Semiconductors Ltd Wide-band microwave modulator arrangements
GB9510679D0 (en) * 1995-05-25 1995-07-19 British Tech Group Method and apparatus for modulating, demodulating and amplifying
US5939951A (en) * 1995-05-25 1999-08-17 Btg International Limited Methods and apparatus for modulating, demodulating and amplifying
DE19730086A1 (de) * 1997-07-14 1999-01-21 Bosch Gmbh Robert Sendeeinrichtung für Hochfrequenzsignale
SE512623C2 (sv) * 1997-11-03 2000-04-10 Ericsson Telefon Ab L M Förfarande och anordning i ett telekommunikationsproblem
US5886573A (en) * 1998-03-06 1999-03-23 Fujant, Inc. Amplification using amplitude reconstruction of amplitude and/or angle modulated carrier
US6133788A (en) * 1998-04-02 2000-10-17 Ericsson Inc. Hybrid Chireix/Doherty amplifiers and methods
WO1999052206A1 (en) * 1998-04-02 1999-10-14 Ericsson, Inc. Hybrid chireix/doherty amplifiers power waveform synthesis
US5930128A (en) * 1998-04-02 1999-07-27 Ericsson Inc. Power waveform synthesis using bilateral devices
US6311046B1 (en) 1998-04-02 2001-10-30 Ericsson Inc. Linear amplification systems and methods using more than two constant length vectors
US6285251B1 (en) 1998-04-02 2001-09-04 Ericsson Inc. Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control
US6889034B1 (en) 1998-04-02 2005-05-03 Ericsson Inc. Antenna coupling systems and methods for transmitters
US5990734A (en) * 1998-06-19 1999-11-23 Datum Telegraphic Inc. System and methods for stimulating and training a power amplifier during non-transmission events
TW448628B (en) 1998-09-22 2001-08-01 Texas Instruments Inc Quadrature output oscillator device, and method of providing ideal in-phase and quadrature phase signal components
US6201452B1 (en) 1998-12-10 2001-03-13 Ericsson Inc. Systems and methods for converting a stream of complex numbers into a modulated radio power signal
US6411655B1 (en) * 1998-12-18 2002-06-25 Ericsson Inc. Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal
US6181199B1 (en) 1999-01-07 2001-01-30 Ericsson Inc. Power IQ modulation systems and methods
US6449465B1 (en) * 1999-12-20 2002-09-10 Motorola, Inc. Method and apparatus for linear amplification of a radio frequency signal
SE516847C2 (sv) 2000-07-07 2002-03-12 Ericsson Telefon Ab L M Sammansatt förstärkare samt sändare som innefattar en sådan förstärkare
GB2375247A (en) * 2001-04-30 2002-11-06 Wireless Systems Int Ltd Signal processing apparatus incorporating clipping/attenuation and predistortion
US7058369B1 (en) 2001-11-21 2006-06-06 Pmc-Sierra Inc. Constant gain digital predistortion controller for linearization of non-linear amplifiers
US7327803B2 (en) * 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
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
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8013675B2 (en) * 2007-06-19 2011-09-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
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
US8315336B2 (en) * 2007-05-18 2012-11-20 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment
US7620129B2 (en) * 2007-01-16 2009-11-17 Parkervision, Inc. RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals
WO2008090598A1 (ja) * 2007-01-22 2008-07-31 Panasonic Corporation 増幅装置
JP5161877B2 (ja) * 2007-06-11 2013-03-13 株式会社アドバンテスト 測定装置およびプログラム
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
KR20140026458A (ko) 2011-04-08 2014-03-05 파커비전, 인크. Ｒｆ 전력 송신, 변조 및 증폭 시스템들 및 방법들
WO2012167111A2 (en) 2011-06-02 2012-12-06 Parkervision, Inc. Antenna control
EP3047348A4 (en) 2013-09-17 2016-09-07 Parkervision Inc METHOD, DEVICE AND SYSTEM FOR THE PRESENTATION OF A MEDIA TIME FUNCTION
US10044383B2 (en) 2016-12-30 2018-08-07 Silicon Laboratories Inc. Sinewave generation from multi-phase signals
US9979404B1 (en) * 2016-12-30 2018-05-22 Silicon Laboratories Inc. Multi-phase amplitude and phase modulation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748590A (en) * 1972-04-14 1973-07-24 Singer Co Sine cosine frequency tracker
US3953805A (en) * 1974-11-07 1976-04-27 Texas Instruments Incorporated DC component suppression in zero CF IF systems
NL8001903A (nl) * 1980-04-01 1981-11-02 Philips Nv Inrichting voor het versterken van een gemoduleerd draaggolfsignaal.
JP2572986B2 (ja) * 1987-06-03 1997-01-16 三洋電機株式会社 復調回路
US5105168A (en) * 1991-08-28 1992-04-14 Hewlett-Packard Company Vector locked loop

Also Published As

Publication number Publication date
GB9209982D0 (en) 1992-06-24
DE69309922T2 (de) 1997-07-24
CA2135304A1 (en) 1993-11-09
GB2267402A (en) 1993-12-01
EP0639306A1 (en) 1995-02-22
WO1993023921A1 (en) 1993-11-25
EP0639306B1 (en) 1997-04-16
US5719527A (en) 1998-02-17
GB9309571D0 (en) 1993-06-23
JPH07509106A (ja) 1995-10-05
DE69309922D1 (de) 1997-05-22

Similar Documents

Publication Publication Date Title
GB9209982D0 (en) Method and apparatus for amplifying modulating and demodulating
US5224775B1 (en) Method and apparatus for modulated differential analysis
KR960015761B1 (en) Charaster gerenating method and apparatus
GB2271039B (en) Apparatus and method for alternative radiotelephone system selection
EP0592146A3 (en) Color reproduction method and apparatus
EP0593282A3 (en) Recording apparatus and recording method
EP0592147A3 (en) Color reproduction method and apparatus
GB2270432B (en) Recording method and apparatus
HK1008858A1 (en) Method and device for amplifying
EP0572164A3 (en) Method and apparatus for spatially resolved modulated differential analysis
ZA93398B (en) Freezing method and apparatus therefor
AU3804093A (en) Method and apparatus for partial response demodulation
EP0555832A3 (en) Data modulating method and apparatus and data demodulating method and apparatus
GB9214427D0 (en) Method and apparatus for freezing
GB9226594D0 (en) Autolevelling method and apparatus
GB9325993D0 (en) Method and apparatus for connection
GB2270771B (en) Weigh-filling method and apparatus
EP0595243A3 (en) Punching method and punching apparatus
SG48287A1 (en) Welding method and apparatus
EP0563719A3 (en) Digital modulating method and digital modulating apparatus
EP0583477A4 (en) Printing method and apparatus
EP0554180A3 (en) Message sending method and apparatus
GB2265101B (en) Soldering apparatus and method
AU3464693A (en) Communication method and apparatus
EP0610554A3 (en) Apparatus and method for the determination of the no - content.