ATE386367T1 - Verbessertes verfahren und gerät zur frequenzaufwärtswandlung von radiofrequenzsignalen - Google Patents

Verbessertes verfahren und gerät zur frequenzaufwärtswandlung von radiofrequenzsignalen

Info

Publication number
ATE386367T1
ATE386367T1 AT00958052T AT00958052T ATE386367T1 AT E386367 T1 ATE386367 T1 AT E386367T1 AT 00958052 T AT00958052 T AT 00958052T AT 00958052 T AT00958052 T AT 00958052T AT E386367 T1 ATE386367 T1 AT E386367T1
Authority
AT
Austria
Prior art keywords
signal
improved method
frequency
upconversion
radio frequency
Prior art date
Application number
AT00958052T
Other languages
English (en)
Inventor
Tajinder Manku
Chris Snyder
Gareth Weale
Original Assignee
Sirific Wireless Corp
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 Sirific Wireless Corp filed Critical Sirific Wireless Corp
Application granted granted Critical
Publication of ATE386367T1 publication Critical patent/ATE386367T1/de

Links

Classifications

    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation 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
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • 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
    • H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
AT00958052T 1999-09-01 2000-09-01 Verbessertes verfahren und gerät zur frequenzaufwärtswandlung von radiofrequenzsignalen ATE386367T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2281236A CA2281236C (en) 1999-09-01 1999-09-01 Direct conversion rf schemes using a virtually generated local oscillator

Publications (1)

Publication Number Publication Date
ATE386367T1 true ATE386367T1 (de) 2008-03-15

Family

ID=4164053

Family Applications (2)

Application Number Title Priority Date Filing Date
AT00958052T ATE386367T1 (de) 1999-09-01 2000-09-01 Verbessertes verfahren und gerät zur frequenzaufwärtswandlung von radiofrequenzsignalen
AT00958051T ATE387753T1 (de) 1999-09-01 2000-09-01 Frequenzumsetzer unter verwendung eines aperiodischen überlagerungsoszillatorsignals

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT00958051T ATE387753T1 (de) 1999-09-01 2000-09-01 Frequenzumsetzer unter verwendung eines aperiodischen überlagerungsoszillatorsignals

Country Status (7)

Country Link
US (3) US7016662B1 (de)
EP (3) EP1208653A1 (de)
AT (2) ATE386367T1 (de)
AU (3) AU6974200A (de)
CA (2) CA2281236C (de)
DE (4) DE60038027T2 (de)
WO (3) WO2001017121A1 (de)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2281236C (en) 1999-09-01 2010-02-09 Tajinder Manku Direct conversion rf schemes using a virtually generated local oscillator
US20020094794A1 (en) * 2000-12-29 2002-07-18 Tajinder Manku Method and apparatus for conversion of radio frequency (RF) and baseband signals
EP1289123A1 (de) * 2001-08-10 2003-03-05 Asulab S.A. Frequenzumsetzer für ein GPS-Empfänger
CA2356077A1 (en) * 2001-08-28 2003-02-28 Sirific Wireless Corporation Improved apparatus and method for down conversion
EP1479160A2 (de) * 2002-02-25 2004-11-24 Sirific Wireless Corporation Abwärts-frequenzumsetzer unter verwendung eines mehrton-lokal-oszillators
WO2003071696A1 (en) 2002-02-25 2003-08-28 Sirific Wireless Corporation Method and apparatus for down conversion of radio frequency (rf) signals
CA2375291C (en) * 2002-03-08 2005-05-17 Sirific Wireless Corporation Generation of virtual local oscillator inputs for use in direct conversion radio systems
US6727764B2 (en) 2002-03-08 2004-04-27 Sirific Wireless Corporation Generation of virtual local oscillator inputs for use in direct conversion radio systems
KR100785003B1 (ko) 2002-09-06 2007-12-11 삼성전자주식회사 위상동기루프(ｐｌｌ)의 제어전압을 이용한 멀티밴드용송수신장치 및 송수신 방법
KR100464431B1 (ko) * 2002-09-25 2005-01-03 삼성전자주식회사 무선 통신 시스템에서 1/f 잡음을 개선한 RF신호 수신장치 및 그 방법
WO2004036776A1 (en) * 2002-10-15 2004-04-29 Sirific Wireless Corporation Dc trimming circuit for radio frequency (rf) down-conversion
CA2415668A1 (en) * 2003-01-06 2004-07-06 Sirific Wireless Corporation Integrated, configurable multi-mode transmitter
EP1590885A1 (de) * 2003-01-06 2005-11-02 Sirific Wireless Corporation Mehrfachmodus-modulator und sender
CA2415917A1 (en) * 2003-01-08 2004-07-08 Sirific Wireless Corporation Regenerative divider used for up-conversion and down conversion
US7720448B2 (en) * 2003-12-30 2010-05-18 Freescale Semiconductor, Inc. Signal generation power management control system for portable communications device and method of using same
CA2467201A1 (en) * 2004-05-13 2005-11-13 Sirific Wireless Corporation Dynamic and static spurious correction and control
KR100570712B1 (ko) * 2004-05-17 2006-04-12 전자부품연구원 높은 반송파 억압비를 가지는 2의 ｎ제곱차 저조파 주파수변조기 및 이를 이용한 직접 변환 송신기
US7177616B2 (en) * 2004-08-13 2007-02-13 Freescale Semiconductor, Inc. High linearity and low noise CMOS mixer and signal mixing method
US8050649B2 (en) * 2005-08-30 2011-11-01 Qualcomm Incorporated Downconversion mixer with IM2 cancellation
US7542519B2 (en) * 2005-12-29 2009-06-02 Crestcom, Inc. Radio frequency transmitter and method therefor
US20080009260A1 (en) * 2006-07-10 2008-01-10 Mediatek Inc. Mixer with dynamic intermediate frequency for radio-frequency front-end and method using the same
US7606538B2 (en) * 2006-07-14 2009-10-20 Infineon Technologies Ag Mixer circuit and method
WO2009009183A1 (en) * 2007-04-16 2009-01-15 The Regents Of The University Of California Submillimeter-wave signal generation by linear superimposition of phase-shifted fundamental tone signals
US8331897B2 (en) * 2008-04-07 2012-12-11 Qualcomm Incorporated Highly linear embedded filtering passive mixer
CN102739269A (zh) * 2011-04-14 2012-10-17 北京中电华大电子设计有限责任公司 一种宽带的数字化射频接收机
JP5460824B2 (ja) 2011-12-09 2014-04-02 キヤノン株式会社 カートリッジ
JP6273310B2 (ja) * 2016-03-30 2018-01-31 古河電気工業株式会社 電力測定装置
US11012104B2 (en) 2017-03-03 2021-05-18 Analog Devices, Inc. Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage
CN108055049B (zh) * 2017-12-26 2024-01-12 广州中海达卫星导航技术股份有限公司 无线数传电台接收电路
US11570709B2 (en) * 2019-01-14 2023-01-31 The Regents Of The University Of California BLE and/or WiFi compliant and blocker-resilient wake-up receiver and method
US11916604B2 (en) * 2020-06-05 2024-02-27 Intel Corporation Dispersion compensation for electromagnetic waveguides
US11689226B2 (en) * 2021-03-19 2023-06-27 U-Blox Ag Methods and apparatus for transmitting signals

Family Cites Families (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627586C3 (de) 1976-06-19 1980-03-13 Carl Schenck Ag, 6100 Darmstadt Verfahren und Schaltungsanordnung zur Multiplikation von elektrischen Wechselspannungssignalen
GB1556087A (en) 1977-12-01 1979-11-21 Standard Telephones Cables Ltd Single channel duplex radio system
US4193034A (en) 1978-07-06 1980-03-11 International Standard Electric Corporation Radio receiver for FSK signals
GB2032737A (en) 1978-10-24 1980-05-08 Standard Telephones Cables Ltd Radio receiver for tone modulated signals
GB2035013B (en) 1978-11-14 1982-11-24 Standard Telephones Cables Ltd Splitter/combiner network
GB2057820B (en) 1979-09-04 1984-07-04 Standard Telephones Cables Ltd Radio receiver for fsk signals
GB2083977B (en) 1980-08-26 1984-08-22 Standard Telephones Cables Ltd Single channel duplex radio system
GB2101821B (en) 1981-07-16 1984-11-14 Standard Telephones Cables Ltd Radio receiver for frequency shift keyed signals
GB2103402B (en) 1981-07-27 1984-09-05 Standard Telephones Cables Ltd Synchronisation of digital radio pager
GB2104747B (en) 1981-08-25 1984-12-12 Standard Telephones Cables Ltd Integrated circuit power supplies
GB2106734B (en) 1981-09-15 1986-01-15 Standard Telephones Cables Ltd Radio receiver
GB2106359B (en) 1981-09-24 1985-07-03 Standard Telephones Cables Ltd Direct conversion radio receiver for fm signals
GB2109197B (en) 1981-10-13 1985-12-04 Standard Telephones Cables Ltd Radio system
GB2109201B (en) 1981-10-26 1985-03-27 Philips Electronic Associated Direct modulation fm receiver
US4677690A (en) 1982-01-25 1987-06-30 International Telephone And Telegraph Corporation Baseband demodulator for FM and/or AM signals
US4476585A (en) 1982-01-25 1984-10-09 International Telephone And Telegraph Corporation Baseband demodulator for FM signals
US4599743A (en) 1982-01-25 1986-07-08 Itt Corporation Baseband demodulator for FM and/or AM signals
NL8301651A (nl) 1983-05-10 1984-12-03 Philips Nv Menginrichting voorzien van eerste en tweede kwadratuurmengtrappen.
GB2141007B (en) 1983-06-02 1986-07-23 Standard Telephones Cables Ltd Demodulator logic for frequency shift keyed signals
GB2143386B (en) 1983-07-14 1987-01-14 Standard Telephones Cables Ltd Radio receiver
GB2149244B (en) 1983-10-29 1987-01-21 Standard Telephones Cables Ltd Digital demodulator arrangement for quadrature signals
GB2172159A (en) 1985-03-07 1986-09-10 Stc Plc A/d converters
US4736390A (en) * 1986-10-15 1988-04-05 Itt Avionics, A Division Of Itt Corporation Zero IF radio receiver apparatus
US4811425A (en) 1987-01-09 1989-03-07 Itt Avionics, A Division Of Itt Corporation Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers
DE3815055A1 (de) 1988-05-04 1989-11-16 Standard Elektrik Lorenz Ag Quadratur-empfaenger
JP2817373B2 (ja) 1990-07-30 1998-10-30 松下電器産業株式会社 ダイレクトコンバージョン受信機
GB9017418D0 (en) 1990-08-08 1990-09-19 Gen Electric Co Plc Half frequency mixer
US5128623A (en) 1990-09-10 1992-07-07 Qualcomm Incorporated Direct digital synthesizer/direct analog synthesizer hybrid frequency synthesizer
US5228042A (en) 1991-02-07 1993-07-13 Northern Telecom Limited Method and circuit for testing transmission paths
US5220688A (en) 1991-07-18 1993-06-15 Industrial Technology Research Institute Frequency translating circuit with multiple stages using common local oscillator
FR2681994B1 (fr) 1991-09-26 1994-09-30 Alcatel Telspace Dispositif de transmission numerique comportant un recepteur a demodulation coherente realisee directement en hyperfrequence.
US5179728A (en) 1991-09-30 1993-01-12 Rockwell International Corporation Spurious product and local oscillator radiation suppression system for use in superheterodyne radio receivers
EP0594894B1 (de) * 1992-10-28 1999-03-31 Alcatel Offsetgleichspannungskorrektur für Direktmisch-TDMA-Empfänger
GB2280324B (en) 1993-07-16 1998-07-22 Plessey Semiconductors Ltd Detectors
SE502599C2 (sv) 1993-09-09 1995-11-20 Ericsson Ge Mobile Communicat Sätt och anordning vid en homodynmottagare för att minimera läckage av störsignaler
GB2282030B (en) 1993-09-14 1997-09-24 Plessey Semiconductors Ltd Direct conversion receiver
US5390346A (en) 1994-01-21 1995-02-14 General Instrument Corporation Of Delaware Small frequency step up or down converters using large frequency step synthesizers
US5467294A (en) 1994-03-09 1995-11-14 Hu; Vince High speed, low power direct digital synthesizer
AU2909795A (en) 1994-06-29 1996-01-25 Honeywell Inc. Spurious response rejecting mixer using spread spectrum techniques
JP2737655B2 (ja) 1994-07-12 1998-04-08 双葉電子工業株式会社 スペクトル拡散通信方式
US5448772A (en) * 1994-08-29 1995-09-05 Motorola, Inc. Stacked double balanced mixer circuit
US5471665A (en) * 1994-10-18 1995-11-28 Motorola, Inc. Differential DC offset compensation circuit
GB2296845A (en) 1995-01-04 1996-07-10 Plessey Semiconductors Ltd Frequency shift keyed radio receivers
JPH0936768A (ja) 1995-07-13 1997-02-07 Sony Corp 受信用ｉｃおよびスーパーヘテロダイン受信機
ES2183898T3 (es) 1995-07-18 2003-04-01 Siemens Ag Procedimiento para la reduccion de puestos de recepcion secundarios en receptores homodinos con frecuencia portadora variable en el tiempo.
GB9617423D0 (en) 1995-10-11 1996-10-02 Philips Electronics Nv Receiver circuit
CA2190545A1 (en) 1995-12-26 1997-06-27 Mihai Banu System architecture and method for processing signals received over a path
AU721681B2 (en) 1996-06-10 2000-07-13 Morphics Technology, Inc. Method and apparatus for communicating information
US6029058A (en) 1996-07-19 2000-02-22 The Board Of Trustee Of The Leland Stanford Junior University Spectrum control for direct conversion radio frequency reception
JPH1065566A (ja) 1996-08-23 1998-03-06 Matsushita Electric Ind Co Ltd 小型無線機
US5956345A (en) 1996-09-13 1999-09-21 Lucent Technologies Inc. IS-95 compatible wideband communication scheme
US5896421A (en) * 1996-09-25 1999-04-20 Hughes Electronics Corporation Use of low pass filter and equalizer for noise reduction in direct up-conversion schemes
US5918169A (en) 1996-09-25 1999-06-29 Ericsson, Inc. Homodyne cellular base station
JP3651154B2 (ja) 1996-12-27 2005-05-25 ソニー株式会社 Ｐｎ符号発生回路及び無線システムの端末装置
GB2321352B (en) 1997-01-11 2001-04-04 Plessey Semiconductors Ltd Image reject mixer
US5918167A (en) 1997-03-11 1999-06-29 Northern Telecom Limited Quadrature downconverter local oscillator leakage canceller
KR100264862B1 (ko) 1997-07-31 2000-09-01 윤종용 대역확산에따른직교부호도약다중접속방식통신시스템의송수신장치및그방법
GB2328813B (en) 1997-08-28 2001-08-29 Mitel Corp A radio frequency zero IF direct down converter
GB9718100D0 (en) * 1997-08-28 1997-10-29 Mitel Corp Phase modulated local oscillator
GB2329085B (en) 1997-09-09 2002-06-12 Gec Marconi Comm Ltd RF transmitter
CN1211969C (zh) 1997-09-13 2005-07-20 三星电子株式会社 用于双正交码跳变多址通信系统的设备和方法
SE514795C2 (sv) 1997-10-03 2001-04-23 Ericsson Telefon Ab L M Anordning och förfarande för upp- och nedkonvertering
US6016422A (en) * 1997-10-31 2000-01-18 Motorola, Inc. Method of and apparatus for generating radio frequency quadrature LO signals for direct conversion transceivers
US6002923A (en) 1997-11-07 1999-12-14 Telefonaktiebolaget Lm Ericsson Signal generation in a communications transmitter
CA2224953A1 (en) 1997-12-16 1999-06-16 The University Of Waterloo A low voltage topology for radio frequency integrated circuit design
US6240142B1 (en) 1998-01-07 2001-05-29 Qualcomm Incorporated Quadrature modulator and demodulator
US6192225B1 (en) 1998-04-22 2001-02-20 Ericsson Inc. Direct conversion receiver
US6374361B1 (en) 1998-04-23 2002-04-16 Silicon Image, Inc. Skew-insensitive low voltage differential receiver
EP0953851A3 (de) 1998-04-29 2000-08-09 Mitel Semiconductor Limited Direktsequenzspreizspektrumradar
GB9811345D0 (en) 1998-05-27 1998-07-22 Mitel Semiconductor Ltd Mixer circuit arrangements
US6167247A (en) 1998-07-15 2000-12-26 Lucent Technologies, Inc. Local oscillator leak cancellation circuit
US6194947B1 (en) 1998-07-24 2001-02-27 Global Communication Technology Inc. VCO-mixer structure
CN1148873C (zh) 1998-07-24 2004-05-05 环球通讯科技半导体公司 通信系统、单芯片rf通信系统及rf通信系统的控制方法
DE69821751T2 (de) 1998-07-30 2004-11-25 Motorola Semiconducteurs S.A. Verfahren und Gerät zur Funkübertragung
US6243569B1 (en) 1998-08-12 2001-06-05 Analog Devices, Inc. Direct conversion circuit for radio frequency signals
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
GB2341502B (en) 1998-09-08 2003-01-22 Mitel Semiconductor Ltd Image reject mixer circuit arrangements
US6125272A (en) 1998-09-25 2000-09-26 Motorola, Inc. Method and apparatus providing improved intermodulation distortion protection
CA2280377A1 (en) 1998-10-06 2000-04-06 Lucent Technologies Inc. A quadrature low-if homodyne radio receiver
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6114980A (en) * 1999-04-13 2000-09-05 Motorola, Inc. Method and apparatus for settling a DC offset
EP1192723A1 (de) 1999-05-07 2002-04-03 Morphics Technology, Inc. Programmierbarer digitaler zwischenfrequenz-sende-empfänger
GB9915917D0 (en) 1999-07-08 1999-09-08 Mitel Semiconductor Ltd Tuner
CA2281236C (en) 1999-09-01 2010-02-09 Tajinder Manku Direct conversion rf schemes using a virtually generated local oscillator
GB9921813D0 (en) 1999-09-16 1999-11-17 Mitel Semiconductor Ltd Frequency converter and radio frequency tuner
GB9921811D0 (en) 1999-09-16 1999-11-17 Mitel Semiconductor Ltd Digital tuner
GB2358558B (en) 2000-01-18 2003-10-15 Mitel Corp Packet loss compensation method using injection of spectrally shaped noise
JP2001230695A (ja) 2000-02-16 2001-08-24 Nec Corp 無線機及びそれに使用する周波数変換方法
CA2339744A1 (en) 2000-03-02 2001-09-02 Mitel Semiconductor Ab High speed modulation utilizing field effect for return path
CA2300045A1 (en) 2000-03-03 2001-09-03 Mitel Semiconductor Ab High speed modulation utilizing the field effect

Also Published As

Publication number Publication date
WO2001017120A3 (en) 2001-07-26
EP1208650B1 (de) 2008-02-27
EP1208653A1 (de) 2002-05-29
CA2381997C (en) 2009-10-27
DE20023992U1 (de) 2008-12-18
DE60038178D1 (de) 2008-04-10
CA2281236C (en) 2010-02-09
WO2001017121A1 (en) 2001-03-08
EP1208651B1 (de) 2008-02-13
AU6974100A (en) 2001-03-26
ATE387753T1 (de) 2008-03-15
CA2281236A1 (en) 2001-03-01
EP1208650A2 (de) 2002-05-29
DE60038027T2 (de) 2009-05-14
DE60038027D1 (de) 2008-03-27
US7016662B1 (en) 2006-03-21
EP1208651A1 (de) 2002-05-29
WO2001017120A2 (en) 2001-03-08
WO2001017122A1 (en) 2001-03-08
AU6974300A (en) 2001-03-26
DE60038178T2 (de) 2009-07-16
AU6974200A (en) 2001-03-26
US6973297B1 (en) 2005-12-06
DE20023991U1 (de) 2008-12-18
CA2381997A1 (en) 2001-03-08
US7046980B1 (en) 2006-05-16

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