CA2273671A1 - Local oscillator leak cancellation circuit - Google Patents

Local oscillator leak cancellation circuit Download PDF

Info

Publication number
CA2273671A1
CA2273671A1 CA002273671A CA2273671A CA2273671A1 CA 2273671 A1 CA2273671 A1 CA 2273671A1 CA 002273671 A CA002273671 A CA 002273671A CA 2273671 A CA2273671 A CA 2273671A CA 2273671 A1 CA2273671 A1 CA 2273671A1
Authority
CA
Canada
Prior art keywords
local oscillator
cancellation circuit
converter device
frequency converter
circuit
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.)
Granted
Application number
CA002273671A
Other languages
French (fr)
Other versions
CA2273671C (en
Inventor
George Kenneth Kannell
Robert Evan Myer
Krishnamurthy Sreenath
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.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc.
George Kenneth Kannell
Robert Evan Myer
Krishnamurthy Sreenath
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 Lucent Technologies Inc., George Kenneth Kannell, Robert Evan Myer, Krishnamurthy Sreenath filed Critical Lucent Technologies Inc.
Publication of CA2273671A1 publication Critical patent/CA2273671A1/en
Application granted granted Critical
Publication of CA2273671C publication Critical patent/CA2273671C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • 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
    • 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

Abstract

A method for reducing the level of an undesired signal, generated through a frequency converter device, by implementing a local oscillator (hereinafter "LO") leak cancellation circuit. A feedback correction loop, for a radio frequency (RF) transmitter or receiver, reduces an undesired local oscillator leak generated through a single input frequency converter device, such as a mixer, by a unique detection circuit. A
unique nulling circuit is also implemented for a multiple input frequency converter device, such as a quadrature modulator.
CA002273671A 1998-07-15 1999-06-07 Local oscillator leak cancellation circuit Expired - Fee Related CA2273671C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/115,656 1998-07-15
US09/115,656 US6167247A (en) 1998-07-15 1998-07-15 Local oscillator leak cancellation circuit

Publications (2)

Publication Number Publication Date
CA2273671A1 true CA2273671A1 (en) 2000-01-15
CA2273671C CA2273671C (en) 2002-03-05

Family

ID=22362681

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002273671A Expired - Fee Related CA2273671C (en) 1998-07-15 1999-06-07 Local oscillator leak cancellation circuit

Country Status (9)

Country Link
US (1) US6167247A (en)
EP (1) EP0973254B1 (en)
JP (1) JP3464630B2 (en)
KR (1) KR20000011569A (en)
CN (1) CN1248099A (en)
BR (1) BR9902667A (en)
CA (1) CA2273671C (en)
DE (1) DE69923632T2 (en)
TW (1) TW494613B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973297B1 (en) 1999-09-01 2005-12-06 Sirific Wireless Corporation Method and apparatus for down-conversion of radio frequency (RF) signals with reduced local oscillator leakage

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6542722B1 (en) * 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7031687B2 (en) * 2001-04-18 2006-04-18 Nokia Corporation Balanced circuit arrangement and method for linearizing such an arrangement
KR100392361B1 (en) * 2001-07-13 2003-07-23 한국전자통신연구원 Leakage rejection apparatus using even harmonic mixer, and its method
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US6816718B2 (en) * 2002-02-07 2004-11-09 Rf Micro Devices, Inc. DC offset correction using dummy amplifier
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7280805B2 (en) * 2004-07-09 2007-10-09 Silicon Storage Technology, Inc. LO leakage and sideband image calibration system and method
FI20055632A0 (en) * 2005-11-30 2005-11-30 Nokia Corp Attenuation of a local oscillator leak in a radio transmitter
KR101284943B1 (en) * 2006-06-30 2013-07-10 엘지디스플레이 주식회사 Method for fabricating mold
US20080014873A1 (en) * 2006-07-12 2008-01-17 Krayer Yvonne L Methods and apparatus for adaptive local oscillator nulling
CN101162910B (en) * 2006-10-10 2011-09-21 北京六合万通微电子技术股份有限公司 Device and method of local oscillator leakage automatic eliminator
CN101453226B (en) * 2007-11-30 2013-07-10 松下电器产业株式会社 Local oscillation leakage elimination apparatus and method
KR20100026360A (en) * 2008-08-29 2010-03-10 한국전자통신연구원 Apparatus and method for leakage reduction
US8744385B2 (en) * 2009-09-01 2014-06-03 Provigent Ltd Efficient reduction of local oscillator leakage
US8805286B2 (en) * 2010-04-27 2014-08-12 Nec Corporation Wireless communication device, high-frequency circuit system, and local leak reduction method
CN102270965B (en) 2011-04-02 2013-08-28 华为技术有限公司 Mixer circuit and local oscillation leakage suppression method for mixer circuit
GB2507087B (en) * 2012-10-18 2015-07-22 Broadcom Corp Method and apparatus for signal reception
CN108242940A (en) * 2016-12-26 2018-07-03 中兴通讯股份有限公司 A kind of device and method for eliminating local-oscillator leakage
JP6977658B2 (en) * 2018-05-09 2021-12-08 日本電信電話株式会社 Signal generator and signal generation method
US11177771B2 (en) 2018-10-10 2021-11-16 Analog Devices International Unlimited Company Multi-core mixers with local oscillator leakage compensation
CN111651941B (en) * 2020-04-30 2022-05-17 北京航空航天大学 Global ionosphere electron total content prediction algorithm
CN112305321A (en) * 2020-10-22 2021-02-02 济南浪潮高新科技投资发展有限公司 System and method for debugging amplitude stability of AWG (arrayed waveguide grating) direct-current signal

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410764A (en) * 1981-06-29 1983-10-18 Rockwell International Corporation Speech processor for processing analog signals
GB2213006B (en) * 1987-11-27 1992-01-29 Stc Plc Correction of rf errors in quadrature channels of a zero-if transmitter
US5001773A (en) * 1988-06-20 1991-03-19 Hughes Aircraft Company Local oscillator feedthru cancellation circuit
JPH05175767A (en) * 1991-12-19 1993-07-13 Matsushita Electric Ind Co Ltd Current control circuit
EP0598585B1 (en) * 1992-11-16 1999-03-31 Linear Modulation Technology Ltd Automatic calibration of the quadrature balance within a cartesian amplifier
US5559468A (en) * 1993-06-28 1996-09-24 Motorola, Inc. Feedback loop closure in a linear transmitter
US5584059A (en) * 1993-06-30 1996-12-10 Motorola, Inc. DC offset reduction in a zero-if transmitter
GB9316869D0 (en) * 1993-08-13 1993-09-29 Philips Electronics Uk Ltd Transmitter and power amplifier therefor
JPH0832462A (en) * 1994-07-15 1996-02-02 Uniden Corp Dc offset circuit in cartesian loop
US5918167A (en) * 1997-03-11 1999-06-29 Northern Telecom Limited Quadrature downconverter local oscillator leakage canceller
US5959499A (en) * 1997-09-30 1999-09-28 Motorola, Inc. Predistortion system and method using analog feedback loop for look-up table training

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973297B1 (en) 1999-09-01 2005-12-06 Sirific Wireless Corporation Method and apparatus for down-conversion of radio frequency (RF) signals with reduced local oscillator leakage
US7016662B1 (en) 1999-09-01 2006-03-21 Sirific Wireless Corporation Method and apparatus for up-conversion of radio frequency (RF) signals
US7046980B1 (en) 1999-09-01 2006-05-16 Sirific Wireless Corporation Method and apparatus for up-and down-conversion of radio frequency (RF) signals

Also Published As

Publication number Publication date
US6167247A (en) 2000-12-26
CN1248099A (en) 2000-03-22
TW494613B (en) 2002-07-11
JP3464630B2 (en) 2003-11-10
EP0973254B1 (en) 2005-02-09
DE69923632T2 (en) 2006-01-05
BR9902667A (en) 2000-03-14
KR20000011569A (en) 2000-02-25
DE69923632D1 (en) 2005-03-17
JP2000049631A (en) 2000-02-18
EP0973254A1 (en) 2000-01-19
CA2273671C (en) 2002-03-05

Similar Documents

Publication Publication Date Title
CA2273671A1 (en) Local oscillator leak cancellation circuit
KR101004198B1 (en) Leakage signal canceller
CA2315489A1 (en) Radio communication apparatus and radio communication method
KR960701544A (en) MULTIPLE-MODULATION COMMUNICATION SYSTEM
CA2069104A1 (en) Frequency converter for a radio communications system
US5774788A (en) Remote ground terminal having an outdoor unit with a frequency-multiplier
WO1999057912A3 (en) Dc offset compensation for zero if quadrature demodulator
CA2102565A1 (en) Radio Communication Apparatus Capable of Isolating a Receiver from a Transmitter During a Reception Operation
KR960020130A (en) Transceiver
EP1220441A3 (en) Direct-conversion receiver system and method, especially a GPS receiver system with high pass filtering
AU6660196A (en) Automatic tuning of a radio transceiver
AU2001247242B2 (en) A novel low cost/low power analog transceiver architecture
EP0135816B1 (en) Signal transmission and reception system
US6052568A (en) Apparatus and method for efficiently implementing a satellite transceiver system
US6614837B1 (en) Device system and method for low noise radio frequency transmission
US6026114A (en) Transmitting and receiving apparatus of time division full-duplex spread spectrum communication system
JPH1093461A (en) Receiver
JPH07321686A (en) Direct conversion receiver
JP2007306241A (en) Radio transmitter and receiver
EP0471952A3 (en) Transmitter- and multiple conversion superhet receiver for a telecommunication device
KR20020079964A (en) Architecture for cordless telephones
JP2504205Y2 (en) Transmit radio wave monitor-device
Cehan et al. SOME METHODS FOR SUPERIMPOSING DATA ON AMPLITUDE MODULATED RADIO SIGNALS
JPS55161430A (en) Radio communicating system
JPS5451404A (en) Fm radio telegraphy unit for mobile mounting

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20160607