WO1995019073A3 - Receiver having an adjustable bandwidth filter - Google Patents

Receiver having an adjustable bandwidth filter Download PDF

Info

Publication number
WO1995019073A3
WO1995019073A3 PCT/IB1994/000415 IB9400415W WO9519073A3 WO 1995019073 A3 WO1995019073 A3 WO 1995019073A3 IB 9400415 W IB9400415 W IB 9400415W WO 9519073 A3 WO9519073 A3 WO 9519073A3
Authority
WO
WIPO (PCT)
Prior art keywords
passive filter
receiver
bandwidth filter
resistor
amplifier
Prior art date
Application number
PCT/IB1994/000415
Other languages
French (fr)
Other versions
WO1995019073A2 (en
Inventor
Paul Anthony Moore
Original Assignee
Philips Electronics Nv
Philips Norden Ab
Philips Electronics Uk Ltd
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 Philips Electronics Nv, Philips Norden Ab, Philips Electronics Uk Ltd filed Critical Philips Electronics Nv
Priority to EP95901574A priority Critical patent/EP0686324B1/en
Priority to JP51838995A priority patent/JP3701306B2/en
Priority to KR1019950703545A priority patent/KR100323925B1/en
Priority to DE69424407T priority patent/DE69424407T2/en
Publication of WO1995019073A2 publication Critical patent/WO1995019073A2/en
Publication of WO1995019073A3 publication Critical patent/WO1995019073A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/246—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection using electronic means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • 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
    • 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
    • H04B1/26—Circuits for superheterodyne receivers
    • H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes

Abstract

A radio receiver has a frequency down conversion stage (28) including a first passive filter (50, 51, 52) tuned to a lower frequency. An amplifier (56, 58) functioning as a voltage to current converter (54) comprises a resistor (60) which can be shunted by a second passive filter (70, 71, 74) in response to actuation of symmetrically arranged switching devices (72, 73). When the second passive filter shunts the resistor the overall pass band is raised to a higher frequency. Additionally the amplifier has a lower noise figure when the second passive filter shunts the transconductor.
PCT/IB1994/000415 1993-12-24 1994-12-13 Receiver having an adjustable bandwidth filter WO1995019073A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP95901574A EP0686324B1 (en) 1993-12-24 1994-12-13 Receiver having an adjustable bandwidth filter
JP51838995A JP3701306B2 (en) 1993-12-24 1994-12-13 Receiver with adjustable bandwidth filter
KR1019950703545A KR100323925B1 (en) 1993-12-24 1994-12-13 Receiver with adjustable bandwidth filter
DE69424407T DE69424407T2 (en) 1993-12-24 1994-12-13 RECEIVER WITH ADJUSTABLE BAND PASS FILTER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9326464.6 1993-12-24
GB939326464A GB9326464D0 (en) 1993-12-24 1993-12-24 Receiver having an adjustable bandwidth filter

Publications (2)

Publication Number Publication Date
WO1995019073A2 WO1995019073A2 (en) 1995-07-13
WO1995019073A3 true WO1995019073A3 (en) 1995-08-17

Family

ID=10747237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1994/000415 WO1995019073A2 (en) 1993-12-24 1994-12-13 Receiver having an adjustable bandwidth filter

Country Status (7)

Country Link
US (1) US5604927A (en)
EP (1) EP0686324B1 (en)
JP (1) JP3701306B2 (en)
KR (1) KR100323925B1 (en)
DE (1) DE69424407T2 (en)
GB (1) GB9326464D0 (en)
WO (1) WO1995019073A2 (en)

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US6072994A (en) * 1995-08-31 2000-06-06 Northrop Grumman Corporation Digitally programmable multifunction radio system architecture
US5909193A (en) * 1995-08-31 1999-06-01 Northrop Grumman Corporation Digitally programmable radio modules for navigation systems
US5859878A (en) * 1995-08-31 1999-01-12 Northrop Grumman Corporation Common receive module for a programmable digital radio
US5805988A (en) * 1995-12-22 1998-09-08 Microtune, Inc. System and method for switching an RF signal between mixers
US5673003A (en) * 1996-03-29 1997-09-30 Motorola, Inc. Amplifier circuit having a variable bandwidth
US6633550B1 (en) * 1997-02-20 2003-10-14 Telefonaktiebolaget Lm Ericsson (Publ) Radio transceiver on a chip
JP3164008B2 (en) * 1997-03-04 2001-05-08 日本電気株式会社 Wireless receiver
JP3413060B2 (en) * 1997-05-13 2003-06-03 松下電器産業株式会社 Direct conversion receiver
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
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
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
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
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
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
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
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
EP1098449A1 (en) * 1999-11-04 2001-05-09 Siemens Aktiengesellschaft Receiver for receiving signals with different frequency bandwidths in different frequency bands
US6614806B1 (en) * 2000-01-06 2003-09-02 Motorola Inc. Method and apparatus for interfering receiver signal overload protection
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
US6469574B1 (en) * 2001-01-26 2002-10-22 Applied Micro Circuits Corporation Selectable equalization system and method
US6928249B2 (en) * 2001-02-15 2005-08-09 Agilent Technologies, Inc. Fiber optic receiver with an adjustable response preamplifier
DE10114779A1 (en) * 2001-03-26 2002-10-24 Infineon Technologies Ag Sending and receiving unit
US6570447B2 (en) * 2001-05-25 2003-05-27 Infineon Technologies Ag Programmable logarithmic gain adjustment for open-loop amplifiers
KR20030016747A (en) * 2001-08-21 2003-03-03 엘지전자 주식회사 Wide band receiving apparatus for communication mobile device
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
TWI228925B (en) * 2003-04-17 2005-03-01 Realtek Semiconductor Corp Image signal processing method and device thereof
TWI257202B (en) 2005-05-04 2006-06-21 Realtek Semiconductor Corp Filter of tunable bandwidth
FR2902583A1 (en) * 2006-06-20 2007-12-21 St Microelectronics Sa Mixer-amplifier for e.g. mobile telephone set, has filter arranged between parallel branches and modifying current circulating in source current circuit during detection of imbalance between branches by comparator
US20080113644A1 (en) * 2006-11-14 2008-05-15 Saverio Trotta Low Noise Mixer
US9444418B1 (en) * 2013-03-15 2016-09-13 Rockwell Collins, Inc. Frequency enhanced active transistor
US9544070B2 (en) * 2014-10-06 2017-01-10 Rohde & Schwarz Gmbh & Co. Kg Frequency-converting sensor and system for providing a radio frequency signal parameter
US11337920B2 (en) 2017-12-18 2022-05-24 Tris Pharma, Inc. Pharmaceutical composition comprising GHB gastro-retentive raft forming systems having trigger pulse drug release
CN112004520A (en) 2017-12-18 2020-11-27 特瑞斯制药公司 Modified release drug powder compositions comprising a gastric retentive raft forming system with triggered pulsed drug release
EP3737353A1 (en) 2017-12-18 2020-11-18 Tris Pharma, Inc. Ghb pharmaceutical compositions comprising a floating interpenetrating polymer network forming system
US20210015744A1 (en) 2017-12-18 2021-01-21 Tris Pharma, Inc. Pharmaceutical compositions comprising a floating interpenetrating polymer network forming system

Citations (2)

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Publication number Priority date Publication date Assignee Title
US4030036A (en) * 1975-05-28 1977-06-14 Sansui Electric Co., Ltd. Bandwidth changing circuit
GB2268846A (en) * 1992-07-08 1994-01-19 Ics Electronics Ltd Eliminating band-pass filters from two tone binary data receivers

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JPS6218809A (en) * 1985-07-18 1987-01-27 Toshiba Corp Tuner agc circuit
US4905306A (en) * 1988-02-26 1990-02-27 Rca Licensing Corporation Filter switching arrangement for a tuner
JPH0250624A (en) * 1988-08-12 1990-02-20 Sanyo Electric Co Ltd Intermediate frequency band switching device
TW263640B (en) * 1992-06-26 1995-11-21 Philips Electronics Nv

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030036A (en) * 1975-05-28 1977-06-14 Sansui Electric Co., Ltd. Bandwidth changing circuit
GB2268846A (en) * 1992-07-08 1994-01-19 Ics Electronics Ltd Eliminating band-pass filters from two tone binary data receivers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 12, No. 35, (E-579); & JP,A,62 188 509 (FUJITSU LTD) 18 August 1987. *

Also Published As

Publication number Publication date
EP0686324A1 (en) 1995-12-13
EP0686324B1 (en) 2000-05-10
US5604927A (en) 1997-02-18
DE69424407D1 (en) 2000-06-15
KR960701551A (en) 1996-02-24
JP3701306B2 (en) 2005-09-28
GB9326464D0 (en) 1994-02-23
WO1995019073A2 (en) 1995-07-13
KR100323925B1 (en) 2002-06-20
JPH08507430A (en) 1996-08-06
DE69424407T2 (en) 2000-12-07

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