US3717844A - Process of high reliability for communications between a master installation and secondary installations and device for carrying out this process - Google Patents

Process of high reliability for communications between a master installation and secondary installations and device for carrying out this process Download PDF

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Publication number
US3717844A
US3717844A US00025017A US3717844DA US3717844A US 3717844 A US3717844 A US 3717844A US 00025017 A US00025017 A US 00025017A US 3717844D A US3717844D A US 3717844DA US 3717844 A US3717844 A US 3717844A
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United States
Prior art keywords
installation
message
frequency
messages
sequence
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Expired - Lifetime
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US00025017A
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English (en)
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J Barret
G Jourdan
J Harbonn
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0025—Crystal modifications; Special X-ray patterns
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/08—Calling by using continuous ac
    • H04Q9/12—Calling by using continuous ac using combinations of frequencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/901—Noise or unwanted signal reduction in nonseismic receiving system

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Geophysics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
US00025017A 1969-04-03 1970-04-02 Process of high reliability for communications between a master installation and secondary installations and device for carrying out this process Expired - Lifetime US3717844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6910366A FR2040580A5 (de) 1969-04-03 1969-04-03

Publications (1)

Publication Number Publication Date
US3717844A true US3717844A (en) 1973-02-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00025017A Expired - Lifetime US3717844A (en) 1969-04-03 1970-04-02 Process of high reliability for communications between a master installation and secondary installations and device for carrying out this process

Country Status (8)

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US (1) US3717844A (de)
BE (1) BE747972A (de)
CA (1) CA923216A (de)
DE (1) DE2015773A1 (de)
FR (1) FR2040580A5 (de)
GB (1) GB1310411A (de)
NL (1) NL7004769A (de)
SE (1) SE380957B (de)

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065747A (en) * 1975-11-28 1977-12-27 Bunker Ramo Corporation Acoustical underwater communication system for command control and data
US4937821A (en) * 1987-01-27 1990-06-26 Readtronics Pipeline information delivery system
US5099346A (en) * 1988-01-27 1992-03-24 Spectrix Corporation Infrared communications network
US5247380A (en) * 1988-01-27 1993-09-21 Spectrix Corp Infrared communications network
US5251187A (en) * 1991-03-20 1993-10-05 Parra Jorge M Method and apparatus for separating dolphin from tuna and steering dolphin to a safe area
US5392771A (en) * 1990-10-19 1995-02-28 Uwatec Ag Underwater monitoring and communication system
WO1998052072A1 (en) * 1997-05-15 1998-11-19 Geo-X Systems Ltd. Seismic data acquisition system
US6002640A (en) * 1997-05-15 1999-12-14 Geo-X Systems, Inc. Seismic data acquisition system
US6018501A (en) * 1997-12-10 2000-01-25 Halliburton Energy Services, Inc. Subsea repeater and method for use of the same
US6049706A (en) * 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6061551A (en) * 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6061555A (en) * 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6091940A (en) * 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US20010038318A1 (en) * 1999-11-24 2001-11-08 Parker Vision, Inc. Phased array antenna applications for universal frequency translation
US6347252B1 (en) * 1997-09-26 2002-02-12 Phoenix Contact Gmbh & Co. Control and data transmission installation and a process for the transmission of safety-related data
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US20020042257A1 (en) * 2000-04-14 2002-04-11 Sorrells David F. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US20020049038A1 (en) * 2000-01-28 2002-04-25 Sorrells David F. Wireless and wired cable modem applications of universal frequency translation technology
US20020124036A1 (en) * 2000-11-14 2002-09-05 Parkervision, Inc. Method and apparatus for a parallel correlator and applications thereof
WO2002088516A1 (en) * 2001-04-30 2002-11-07 Shell Internationale Research Maatschappij B.V. Subsea drilling riser disconnect system and method
US20020193947A1 (en) * 2001-06-05 2002-12-19 Geo-X Systems, Ltd. Seismic data acquisition system
US20030022640A1 (en) * 1999-08-23 2003-01-30 Parker Vision, Inc. Method and system for frequency up-conversion
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6584406B1 (en) 2000-06-15 2003-06-24 Geo-X Systems, Ltd. Downhole process control method utilizing seismic communication
US20030128776A1 (en) * 2001-11-09 2003-07-10 Parkervision, Inc Method and apparatus for reducing DC off sets in a communication system
US20030168213A1 (en) * 2002-02-01 2003-09-11 Geo-X Systems, Ltd. Extent of detonation determination method using seismic energy
US20030181189A1 (en) * 1999-04-16 2003-09-25 Sorrells David F. Method and apparatus for reducing DC offsets in communication systems using universal frequency translation technology
US20040006430A1 (en) * 2000-06-15 2004-01-08 Geo-X Systems, Ltd. Seismic monitoring and control method
US20040015420A1 (en) * 2002-07-18 2004-01-22 Sorrells David F. Networking methods and systems
US20040013177A1 (en) * 2002-07-18 2004-01-22 Parker Vision, Inc. Networking methods and systems
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US20040185901A1 (en) * 2003-03-18 2004-09-23 Tdk Corporation Electronic device for wireless communications and reflector device for wireless communication cards
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US20040230628A1 (en) * 2000-11-14 2004-11-18 Rawlins Gregory S. Methods, systems, and computer program products for parallel correlation and applications thereof
US20050052949A1 (en) * 2003-03-20 2005-03-10 Baker Hughes Incorporated Use of pattern recognition in a measurement of formation transit time for seismic checkshots
US6873836B1 (en) 1999-03-03 2005-03-29 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US20050100115A1 (en) * 1999-04-16 2005-05-12 Sorrells David F. Method, system, and apparatus for balanced frequency Up-conversion of a baseband signal
US20050123025A1 (en) * 1999-08-04 2005-06-09 Sorrells David F. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US20050136861A1 (en) * 1998-10-21 2005-06-23 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6963734B2 (en) 1999-12-22 2005-11-08 Parkervision, Inc. Differential frequency down-conversion using techniques of universal frequency translation technology
US6975848B2 (en) 2002-06-04 2005-12-13 Parkervision, Inc. Method and apparatus for DC offset removal in a radio frequency communication channel
US7006805B1 (en) 1999-01-22 2006-02-28 Parker Vision, Inc. Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US7027786B1 (en) 1998-10-21 2006-04-11 Parkervision, Inc. Carrier and clock recovery using universal frequency translation
US7054296B1 (en) 1999-08-04 2006-05-30 Parkervision, Inc. Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US7085335B2 (en) 2001-11-09 2006-08-01 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7110435B1 (en) 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US20070230611A1 (en) * 1999-04-16 2007-10-04 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US7321640B2 (en) 2002-06-07 2008-01-22 Parkervision, Inc. Active polyphase inverter filter for quadrature signal generation
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
US7554508B2 (en) 2000-06-09 2009-06-30 Parker Vision, Inc. Phased array antenna applications on universal frequency translation
US7724845B2 (en) 1999-04-16 2010-05-25 Parkervision, Inc. Method and system for down-converting and electromagnetic signal, and transforms for same
US20100171637A1 (en) * 2005-06-15 2010-07-08 Andrew Jaffrey Wireless auxiliary monitoring and control system for an underwater installation
GB2478761A (en) * 2010-03-17 2011-09-21 Wireless Fibre Systems Ltd Wireless Auxiliary Monitoring and Control System for Remote Underwater Installation
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US20220368430A1 (en) * 2019-06-26 2022-11-17 Nippon Telegraph And Telephone Corporation Communication System, Slave Station, and Communication Method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459895A1 (fr) * 1979-06-25 1981-01-16 Secoma Dispositif d'alimentation et de commande a distance pour une pluralite de recepteurs hydrauliques disposes sur un meme engin
GB2182180A (en) * 1985-10-30 1987-05-07 Otis Eng Co Electronic control system with fiber optic link
US4800541A (en) * 1987-02-12 1989-01-24 Canadian Patents And Development Limited Method for underwater acoustic direction sensing
JP4228354B2 (ja) * 1997-12-22 2009-02-25 Ｓｍｃ株式会社 電空レギュレータシステム

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US2643369A (en) * 1945-09-28 1953-06-23 Theodore M Manley Modulated pulse remote control
US3299358A (en) * 1963-01-23 1967-01-17 Philco Ford Corp Remote control receiver with a detector responsive only to unmodulated carrier wave
US3313160A (en) * 1964-06-29 1967-04-11 David A Goldman Remote meter reading system
US3348226A (en) * 1963-08-12 1967-10-17 Edgar H Fischer Automaton command circuit
US3427554A (en) * 1967-07-03 1969-02-11 Honeywell Inc Control apparatus

Patent Citations (6)

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US2282102A (en) * 1940-12-12 1942-05-05 Rca Corp Signaling
US2643369A (en) * 1945-09-28 1953-06-23 Theodore M Manley Modulated pulse remote control
US3299358A (en) * 1963-01-23 1967-01-17 Philco Ford Corp Remote control receiver with a detector responsive only to unmodulated carrier wave
US3348226A (en) * 1963-08-12 1967-10-17 Edgar H Fischer Automaton command circuit
US3313160A (en) * 1964-06-29 1967-04-11 David A Goldman Remote meter reading system
US3427554A (en) * 1967-07-03 1969-02-11 Honeywell Inc Control apparatus

Cited By (184)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065747A (en) * 1975-11-28 1977-12-27 Bunker Ramo Corporation Acoustical underwater communication system for command control and data
US4147222A (en) * 1975-11-28 1979-04-03 Bunker Ramo Corporation Acoustical underwater communication system for command control and data
US4937821A (en) * 1987-01-27 1990-06-26 Readtronics Pipeline information delivery system
US5099346A (en) * 1988-01-27 1992-03-24 Spectrix Corporation Infrared communications network
US5247380A (en) * 1988-01-27 1993-09-21 Spectrix Corp Infrared communications network
US5392771A (en) * 1990-10-19 1995-02-28 Uwatec Ag Underwater monitoring and communication system
US5251187A (en) * 1991-03-20 1993-10-05 Parra Jorge M Method and apparatus for separating dolphin from tuna and steering dolphin to a safe area
WO1998052072A1 (en) * 1997-05-15 1998-11-19 Geo-X Systems Ltd. Seismic data acquisition system
US6002640A (en) * 1997-05-15 1999-12-14 Geo-X Systems, Inc. Seismic data acquisition system
US6347252B1 (en) * 1997-09-26 2002-02-12 Phoenix Contact Gmbh & Co. Control and data transmission installation and a process for the transmission of safety-related data
US6611722B2 (en) * 1997-09-26 2003-08-26 Phoenix Contact Gmbh & Co. Kg Control and data transmission installation and a process for the transmission of safety-related data
US6018501A (en) * 1997-12-10 2000-01-25 Halliburton Energy Services, Inc. Subsea repeater and method for use of the same
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US7936022B2 (en) 1998-10-21 2011-05-03 Parkervision, Inc. Method and circuit for down-converting a signal
US7308242B2 (en) 1998-10-21 2007-12-11 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7376410B2 (en) 1998-10-21 2008-05-20 Parkervision, Inc. Methods and systems for down-converting a signal using a complementary transistor structure
US6091940A (en) * 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US6353735B1 (en) 1998-10-21 2002-03-05 Parkervision, Inc. MDG method for output signal generation
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
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
US6421534B1 (en) 1998-10-21 2002-07-16 Parkervision, Inc. Integrated frequency translation and selectivity
US8340618B2 (en) 1998-10-21 2012-12-25 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US20020160809A1 (en) * 1998-10-21 2002-10-31 Parker Vision, Inc. Applications of universal frequency translation
US20050202797A1 (en) * 1998-10-21 2005-09-15 Sorrells David F. Methods and systems for down-converting electromagnetic signals, and applications thereof
US8233855B2 (en) 1998-10-21 2012-07-31 Parkervision, Inc. Up-conversion based on gated information signal
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US20030068990A1 (en) * 1998-10-21 2003-04-10 Parkervision, Inc. Method and system for frequency up-conversion with a variety of transmitter configurations
US20070259627A1 (en) * 1998-10-21 2007-11-08 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6580902B1 (en) 1998-10-21 2003-06-17 Parkervision, Inc. Frequency translation using optimized switch structures
US20030112895A1 (en) * 1998-10-21 2003-06-19 Parkervision, Inc. Intergrated frequency translation and selectivity
US7529522B2 (en) 1998-10-21 2009-05-05 Parkervision, Inc. Apparatus and method for communicating an input signal in polar representation
US7245886B2 (en) 1998-10-21 2007-07-17 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6061555A (en) * 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US20090181627A1 (en) * 1998-10-21 2009-07-16 Parkervision, Inc. Applications of Universal Frequency Translation
US7218907B2 (en) 1998-10-21 2007-05-15 Parkervision, Inc. Method and circuit for down-converting a signal
US20030186670A1 (en) * 1998-10-21 2003-10-02 Sorrells David F. Method and circuit or down-converting a signal
US6647250B1 (en) 1998-10-21 2003-11-11 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US20050215207A1 (en) * 1998-10-21 2005-09-29 Parkervision, Inc. Method and system for frequency up-conversion with a variety of transmitter configurations
US8190108B2 (en) 1998-10-21 2012-05-29 Parkervision, Inc. Method and system for frequency up-conversion
US8190116B2 (en) 1998-10-21 2012-05-29 Parker Vision, Inc. Methods and systems for down-converting a signal using a complementary transistor structure
US8160534B2 (en) 1998-10-21 2012-04-17 Parkervision, Inc. Applications of universal frequency translation
US6687493B1 (en) 1998-10-21 2004-02-03 Parkervision, Inc. Method and circuit for down-converting a signal using a complementary FET structure for improved dynamic range
US6061551A (en) * 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US20090221257A1 (en) * 1998-10-21 2009-09-03 Parkervision, Inc. Method and System For Down-Converting An Electromagnetic Signal, And Transforms For Same, And Aperture Relationships
US7620378B2 (en) 1998-10-21 2009-11-17 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6049706A (en) * 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US7076011B2 (en) 1998-10-21 2006-07-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6798351B1 (en) 1998-10-21 2004-09-28 Parkervision, Inc. Automated meter reader applications of universal frequency translation
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US8019291B2 (en) 1998-10-21 2011-09-13 Parkervision, Inc. Method and system for frequency down-conversion and frequency up-conversion
US6836650B2 (en) 1998-10-21 2004-12-28 Parkervision, Inc. Methods and systems for down-converting electromagnetic signals, and applications thereof
US20110183640A1 (en) * 1998-10-21 2011-07-28 Parkervision, Inc. Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships
US20100056084A1 (en) * 1998-10-21 2010-03-04 Parkervision, Inc. Frequency Conversion Based on Gated Information Signal
US7050508B2 (en) 1998-10-21 2006-05-23 Parkervision, Inc. Method and system for frequency up-conversion with a variety of transmitter configurations
US20110151821A1 (en) * 1998-10-21 2011-06-23 Parkervision, Inc. Methods and Systems for Down-Converting a Signal Using a Complementary Transistor Structure
US7937059B2 (en) 1998-10-21 2011-05-03 Parkervision, Inc. Converting an electromagnetic signal via sub-sampling
US7389100B2 (en) 1998-10-21 2008-06-17 Parkervision, Inc. Method and circuit for down-converting a signal
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US7027786B1 (en) 1998-10-21 2006-04-11 Parkervision, Inc. Carrier and clock recovery using universal frequency translation
US20050136861A1 (en) * 1998-10-21 2005-06-23 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US7016663B2 (en) 1998-10-21 2006-03-21 Parkervision, Inc. Applications of universal frequency translation
US7693502B2 (en) 1998-10-21 2010-04-06 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, transforms for same, and aperture relationships
US7697916B2 (en) 1998-10-21 2010-04-13 Parkervision, Inc. Applications of universal frequency translation
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6266518B1 (en) 1998-10-21 2001-07-24 Parkervision, Inc. Method and system for down-converting electromagnetic signals by sampling and integrating over apertures
US7826817B2 (en) 1998-10-21 2010-11-02 Parker Vision, Inc. Applications of universal frequency translation
US7865177B2 (en) 1998-10-21 2011-01-04 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US20050272395A1 (en) * 1998-10-21 2005-12-08 Parkervision, Inc. Method and circuit for down-converting a signal
US7006805B1 (en) 1999-01-22 2006-02-28 Parker Vision, Inc. Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US7483686B2 (en) 1999-03-03 2009-01-27 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US6873836B1 (en) 1999-03-03 2005-03-29 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US20050164670A1 (en) * 1999-03-03 2005-07-28 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US7110435B1 (en) 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US7599421B2 (en) 1999-03-15 2009-10-06 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US8229023B2 (en) 1999-04-16 2012-07-24 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
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NL7004769A (de) 1970-10-06
SE380957B (sv) 1975-11-17
FR2040580A5 (de) 1971-01-22
DE2015773A1 (de) 1970-10-15
CA923216A (en) 1973-03-20
GB1310411A (en) 1973-03-21
BE747972A (fr) 1970-08-31

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