ATE491265T1 - Verfahren und vorrichtung zum empfangen von hochfrequenzsignalen - Google Patents

Verfahren und vorrichtung zum empfangen von hochfrequenzsignalen

Info

Publication number
ATE491265T1
ATE491265T1 AT07820874T AT07820874T ATE491265T1 AT E491265 T1 ATE491265 T1 AT E491265T1 AT 07820874 T AT07820874 T AT 07820874T AT 07820874 T AT07820874 T AT 07820874T AT E491265 T1 ATE491265 T1 AT E491265T1
Authority
AT
Austria
Prior art keywords
winding
low
noise amplifier
mixer
signal
Prior art date
Application number
AT07820874T
Other languages
English (en)
Inventor
Fenghao Mu
Andreas Martensson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of ATE491265T1 publication Critical patent/ATE491265T1/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
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • 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
    • H03D7/14—Balanced arrangements
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1441—Balanced arrangements with transistors using field-effect transistors
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1458—Double balanced arrangements, i.e. where both input signals are differential
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1466—Passive mixer arrangements
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1483—Balanced arrangements with transistors comprising components for selecting a particular frequency component of the output
    • 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
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0023—Balun circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0025—Gain control circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0043—Bias and operating point
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0088—Reduction of intermodulation, nonlinearities, adjacent channel interference; intercept points of harmonics or intermodulation products
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/009—Reduction of local oscillator or RF leakage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Amplifiers (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
AT07820874T 2006-12-12 2007-10-03 Verfahren und vorrichtung zum empfangen von hochfrequenzsignalen ATE491265T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/609,399 US7599675B2 (en) 2006-12-12 2006-12-12 Method and apparatus for receiving radio frequency signals
PCT/EP2007/060497 WO2008071472A1 (en) 2006-12-12 2007-10-03 Method and apparatus for receiving radio frequency signals

Publications (1)

Publication Number Publication Date
ATE491265T1 true ATE491265T1 (de) 2010-12-15

Family

ID=38137327

Family Applications (1)

Application Number Title Priority Date Filing Date
AT07820874T ATE491265T1 (de) 2006-12-12 2007-10-03 Verfahren und vorrichtung zum empfangen von hochfrequenzsignalen

Country Status (10)

Country Link
US (1) US7599675B2 (de)
EP (1) EP2095518B1 (de)
KR (1) KR20090086643A (de)
CN (1) CN101611556B (de)
AT (1) ATE491265T1 (de)
CA (1) CA2673043A1 (de)
DE (1) DE602007011110D1 (de)
MX (1) MX2009005824A (de)
TW (1) TW200836496A (de)
WO (1) WO2008071472A1 (de)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9026070B2 (en) 2003-12-18 2015-05-05 Qualcomm Incorporated Low-power wireless diversity receiver with multiple receive paths
US9450665B2 (en) 2005-10-19 2016-09-20 Qualcomm Incorporated Diversity receiver for wireless communication
US7890076B2 (en) * 2005-12-15 2011-02-15 Telefonaktiebolaget Lm Ericsson (Publ) Mixer circuit and method
US7616941B2 (en) * 2007-02-26 2009-11-10 Broadcom Corporation Method and system for improving efficiency over power control for linear and class AB power amplifiers
US7825871B2 (en) * 2007-03-19 2010-11-02 Broadcom Corporation Method and system for equalizing antenna circuit matching variations
US20080280585A1 (en) * 2007-05-10 2008-11-13 Broadcom Corporation, A California Corporation RF receiver front-end and applications thereof
US8099070B2 (en) * 2008-04-23 2012-01-17 Telefonaktiebolaget Lm Ericsson (Publ) Passive mixer and four phase clocking method and apparatus
US8433277B2 (en) * 2008-04-23 2013-04-30 Telefonaktiebolaget Lm Ericsson (Publ) Passive mixer and four-phase clocking method and apparatus
US8306494B2 (en) * 2008-08-14 2012-11-06 Broadcom Corporation Method and system for a single-ended input low noise amplifier with differential output
US8086208B2 (en) * 2008-12-05 2011-12-27 Passif Semiconductor Corp. Passive wireless receiver
US20100279641A1 (en) * 2008-12-31 2010-11-04 Siu-Chuang Ivan Lu Receiver for wireless communication system
US8929848B2 (en) * 2008-12-31 2015-01-06 Mediatek Singapore Pte. Ltd. Interference-robust receiver for a wireless communication system
WO2010107460A1 (en) * 2009-03-17 2010-09-23 Skyworks Solutions, Inc. Saw-less, lna-less low noise receiver
KR100964378B1 (ko) * 2009-06-23 2010-06-25 한국전자통신연구원 디지털 수신기
US8897722B2 (en) * 2009-09-11 2014-11-25 Broadcom Corporation RF front-end with wideband transmitter/receiver isolation
EP2302787B1 (de) * 2009-09-23 2012-09-05 Nxp B.V. Frequenzumsetzung
JP5375521B2 (ja) * 2009-10-27 2013-12-25 ソニー株式会社 高周波増幅器および無線通信装置
US8514035B2 (en) 2009-12-30 2013-08-20 Broadcom Corporation RF front-end with on-chip transmitter/receiver isolation using a gyrator
US8620254B2 (en) 2010-02-04 2013-12-31 Cornell University Wireless communication device and system
CN102263572B (zh) * 2010-05-28 2014-06-18 创杰科技股份有限公司 无线通信收发机
US8634480B2 (en) 2010-09-30 2014-01-21 Infineon Technologies Austria Ag Signal transmission arrangement with a transformer and signal transmission method
US8436695B2 (en) * 2010-12-01 2013-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Imbalance detection and reduction for wideband balun
US20120183102A1 (en) * 2011-01-14 2012-07-19 Silicon Laboratories, Inc. Receiver Circuits and Systems for Receiving Medium Wave and Short Wave Signals
US9178669B2 (en) 2011-05-17 2015-11-03 Qualcomm Incorporated Non-adjacent carrier aggregation architecture
US9252827B2 (en) 2011-06-27 2016-02-02 Qualcomm Incorporated Signal splitting carrier aggregation receiver architecture
US9154179B2 (en) 2011-06-29 2015-10-06 Qualcomm Incorporated Receiver with bypass mode for improved sensitivity
US12081243B2 (en) 2011-08-16 2024-09-03 Qualcomm Incorporated Low noise amplifiers with combined outputs
TWI430591B (zh) * 2011-08-25 2014-03-11 Richwave Technology Corp 射頻電路和混頻器
EP2573936A1 (de) 2011-09-23 2013-03-27 Telefonaktiebolaget LM Ericsson (publ) Mischereinheit
WO2013067416A1 (en) * 2011-11-03 2013-05-10 Huawei Technologies Co., Ltd. Compensation apparatus for receiver asymmetric wide passband frequency respsonse with 25% duty cycle passive mixer
CN103259553A (zh) * 2012-02-17 2013-08-21 Imec公司 一种用于无线电设备的前端系统
US9172402B2 (en) 2012-03-02 2015-10-27 Qualcomm Incorporated Multiple-input and multiple-output carrier aggregation receiver reuse architecture
US9362958B2 (en) 2012-03-02 2016-06-07 Qualcomm Incorporated Single chip signal splitting carrier aggregation receiver architecture
US9467093B2 (en) * 2012-03-30 2016-10-11 Qualcomm Incorporated Single ended receiver with a multi-port transformer and shared mixer
US9118439B2 (en) 2012-04-06 2015-08-25 Qualcomm Incorporated Receiver for imbalanced carriers
TWI488466B (zh) * 2012-04-17 2015-06-11 Acer Inc 手持式電子裝置
US8989691B2 (en) 2012-04-19 2015-03-24 Qualcomm Incorporated Impedance balancing for power supply rejection in single-ended receivers
US9154356B2 (en) 2012-05-25 2015-10-06 Qualcomm Incorporated Low noise amplifiers for carrier aggregation
US9867194B2 (en) 2012-06-12 2018-01-09 Qualcomm Incorporated Dynamic UE scheduling with shared antenna and carrier aggregation
WO2014003613A1 (en) * 2012-06-27 2014-01-03 Telefonaktiebolaget L M Ericsson (Publ) Noise reduction and tilt reduction in passive fet multi-phase mixers
US8779834B1 (en) * 2012-08-20 2014-07-15 Maxim Integrated Products, Inc. Multi-LO band switched-core frequency mixer
US8558605B1 (en) * 2012-08-27 2013-10-15 Linear Technology Corporation Frequency mixer topology providing high linearity, low noise and high gain
US9300420B2 (en) 2012-09-11 2016-03-29 Qualcomm Incorporated Carrier aggregation receiver architecture
US9543903B2 (en) 2012-10-22 2017-01-10 Qualcomm Incorporated Amplifiers with noise splitting
US9608574B2 (en) * 2012-11-19 2017-03-28 Qualcomm Incorporated Port isolation in shared transformers
EP2923446B1 (de) * 2012-11-22 2019-02-20 Telefonaktiebolaget LM Ericsson (publ) Sendeempfänger-frontend
US8995591B2 (en) 2013-03-14 2015-03-31 Qualcomm, Incorporated Reusing a single-chip carrier aggregation receiver to support non-cellular diversity
US9287912B2 (en) * 2013-03-15 2016-03-15 Mstar Semiconductor, Inc. Multimode receiver with complex filter
US9166731B2 (en) * 2013-05-23 2015-10-20 Qualcomm Incorporated Transformer with integrated notch filter
CA2834725A1 (en) * 2013-11-26 2015-05-26 Abdul-Karim Lakhani Duplexer with signal cancellation
CN104980173B (zh) * 2014-04-08 2018-07-24 北京大学 一种逆d类功率单元及全数字射频发射前端集成电路结构
US9379753B2 (en) * 2014-09-15 2016-06-28 Qualcomm Incorporated On-chip linearity calibration
US11211954B2 (en) * 2015-03-10 2021-12-28 Blackberry Limited Supporting multiple frequency bands
US9748993B2 (en) * 2015-09-08 2017-08-29 Mediatek Inc. Radio frequency receiver front-end with gain control capability as well as improved impedance matching control capability
US10581135B2 (en) 2015-12-07 2020-03-03 The Trustees Of Columbia University In The City Of New York Circuits and methods for non-reciprocal circulators and transceivers using same
US10177722B2 (en) 2016-01-12 2019-01-08 Qualcomm Incorporated Carrier aggregation low-noise amplifier with tunable integrated power splitter
US10084438B2 (en) * 2016-03-16 2018-09-25 Mediatek Inc. Clock generator using passive mixer and associated clock generating method
US9929760B2 (en) * 2016-04-14 2018-03-27 Taiwan Semiconductor Manufacturing Co., Ltd. Ultra-low-power RF receiver frontend with tunable matching networks
US9577576B1 (en) * 2016-06-22 2017-02-21 Qualcomm Incorporated Biased passive mixer
CN110073556A (zh) * 2016-07-21 2019-07-30 哥伦比亚大学（纽约）理事会 基于次谐波时空电导调制的无磁非互易电路
US9805919B1 (en) * 2017-01-13 2017-10-31 Lam Research Corporation RF detector with double balanced linear mixer and corresponding method of operation
GB201718411D0 (en) * 2017-11-07 2017-12-20 Nordic Semiconductor Asa Multi-band radio receivers
US10305428B1 (en) 2017-12-15 2019-05-28 Qualcomm Incorporated Passive mixer
AU2018411295A1 (en) * 2018-02-28 2020-09-10 Bae Systems Information And Electronic Systems Integration Inc. Power efficient radio mixers
CN108574565B (zh) * 2018-04-25 2024-05-31 四川省安道速博科技有限公司 一种s模式发射机信号质量检测装置及方法
CN109450380A (zh) * 2018-09-26 2019-03-08 江苏大学 一种有源单平衡混频器
WO2020239233A1 (en) * 2019-05-31 2020-12-03 Stichting Imec Nederland Radio frequency receiver and method for down-converting signals to baseband signal components
KR102685413B1 (ko) * 2019-09-11 2024-07-15 삼성전자주식회사 수신기 회로 및 수신시스템
SG10202012510VA (en) * 2019-12-16 2021-07-29 Ebara Corp Output signal processing circuit for eddy current sensor and output signal processing method for eddy current sensor
US11750231B2 (en) 2020-09-30 2023-09-05 Skyworks Solutions, Inc. Peak and gain calibration of a receiver in an isolation product
CN113114291A (zh) * 2021-04-01 2021-07-13 中国空空导弹研究院 一种可重构双通道数字接收机射频前端装置
CN117674873A (zh) * 2023-10-25 2024-03-08 隔空微电子(深圳)有限公司 低功耗接收机及通信装置

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821802A (en) 1997-04-18 1998-10-13 Northern Telecom Limited Transformer-coupled mixer circuit
US6088581A (en) * 1998-03-27 2000-07-11 Motorola, Inc. Method and apparatus for reducing amplitude modulated interference in a receiver
US6393260B1 (en) 1998-04-17 2002-05-21 Nokia Mobile Phones Limited Method for attenuating spurious signals and receiver
US6057714A (en) 1998-05-29 2000-05-02 Conexant Systems, Inc. Double balance differential active ring mixer with current shared active input balun
US6275687B1 (en) 1998-11-30 2001-08-14 Conexant Systems, Inc. Apparatus and method for implementing a low-noise amplifier and mixer
US6782062B1 (en) 2000-03-29 2004-08-24 Sony Corporation Low power and high linearity receivers with reactively biased front ends
US6807407B2 (en) 2000-09-11 2004-10-19 Scientific Components, Inc. Dual double balanced mixer
US6735422B1 (en) * 2000-10-02 2004-05-11 Baldwin Keith R Calibrated DC compensation system for a wireless communication device configured in a zero intermediate frequency architecture
US6653885B2 (en) 2001-05-03 2003-11-25 Peregrine Semiconductor Corporation On-chip integrated mixer with balun circuit and method of making the same
US20030114129A1 (en) 2001-12-17 2003-06-19 Jerng Albert C. System and method for a radio frequency receiver front end utilizing a balun to couple a low-noise amplifier to a mixer
US7299021B2 (en) * 2001-12-28 2007-11-20 Nokia Corporation Method and apparatus for scaling the dynamic range of a receiver for continuously optimizing performance versus power consumption
US7035616B2 (en) * 2002-01-04 2006-04-25 International Business Machines Corporation Two-stage variable-gain mixer employing shunt feedback
US6847808B2 (en) 2002-02-28 2005-01-25 G-Plus, Inc. Ultra-high linearity RF passive mixer
US6889036B2 (en) 2002-03-07 2005-05-03 Freescale Semiconductor, Inc. Integrated frequency selectable resonant coupling network and method thereof
US7102411B2 (en) 2003-03-06 2006-09-05 Broadcom Corporation High linearity passive mixer and associated LO buffer
US7489914B2 (en) * 2003-03-28 2009-02-10 Georgia Tech Research Corporation Multi-band RF transceiver with passive reuse in organic substrates
US7020452B1 (en) * 2003-04-29 2006-03-28 Sirenza Microdevices, Inc. Actively matched center-tapped marchand balanced mixer
US6999747B2 (en) 2003-06-22 2006-02-14 Realtek Semiconductor Corp. Passive harmonic switch mixer
US7113756B2 (en) 2003-08-19 2006-09-26 Honeywell International, Inc. Passive mixer with improved linearity
TWI345369B (en) 2004-01-28 2011-07-11 Mediatek Inc High dynamic range time-varying integrated receiver for elimination of off-chip filters
TWI277292B (en) 2005-01-24 2007-03-21 Richwave Technology Corp Method for transforming output signals of a low-noise amplifier of a wireless transceiver
US7542735B2 (en) * 2006-10-20 2009-06-02 Northrop Grumman Corporation Multi-octave differential upconverter

Also Published As

Publication number Publication date
CA2673043A1 (en) 2008-06-19
EP2095518B1 (de) 2010-12-08
TW200836496A (en) 2008-09-01
WO2008071472A1 (en) 2008-06-19
US20080139149A1 (en) 2008-06-12
MX2009005824A (es) 2009-06-16
DE602007011110D1 (de) 2011-01-20
KR20090086643A (ko) 2009-08-13
US7599675B2 (en) 2009-10-06
CN101611556B (zh) 2013-08-21
CN101611556A (zh) 2009-12-23
EP2095518A1 (de) 2009-09-02

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