GB2324919B - Modulation and frequency conversion by time sharing - Google Patents

Modulation and frequency conversion by time sharing

Info

Publication number
GB2324919B
GB2324919B GB9816663A GB9816663A GB2324919B GB 2324919 B GB2324919 B GB 2324919B GB 9816663 A GB9816663 A GB 9816663A GB 9816663 A GB9816663 A GB 9816663A GB 2324919 B GB2324919 B GB 2324919B
Authority
GB
United Kingdom
Prior art keywords
modulation
frequency conversion
time sharing
sharing
time
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.)
Expired - Fee Related
Application number
GB9816663A
Other versions
GB2324919A (en
GB9816663D0 (en
Inventor
Thomas Hornak
Andrew Z Grzegorek
William J Mcfarland
Richard C Walker
Scott D Willingham
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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
Priority claimed from US08/321,501 external-priority patent/US5678222A/en
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB9816663D0 publication Critical patent/GB9816663D0/en
Publication of GB2324919A publication Critical patent/GB2324919A/en
Application granted granted Critical
Publication of GB2324919B publication Critical patent/GB2324919B/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
    • H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
    • H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
    • 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
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies
GB9816663A 1994-10-12 1995-10-09 Modulation and frequency conversion by time sharing Expired - Fee Related GB2324919B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/321,501 US5678222A (en) 1994-10-12 1994-10-12 Modulation and frequency conversion by time sharing
GB9520579A GB2294169B (en) 1994-10-12 1995-10-09 Modulation and frequency conversion by time sharing

Publications (3)

Publication Number Publication Date
GB9816663D0 GB9816663D0 (en) 1998-09-30
GB2324919A GB2324919A (en) 1998-11-04
GB2324919B true GB2324919B (en) 1999-01-27

Family

ID=26307914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9816663A Expired - Fee Related GB2324919B (en) 1994-10-12 1995-10-09 Modulation and frequency conversion by time sharing

Country Status (1)

Country Link
GB (1) GB2324919B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8594228B2 (en) 1999-04-16 2013-11-26 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion

Families Citing this family (26)

* 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
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer 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
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
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
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
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
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
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
DE60005291T2 (en) * 2000-01-24 2004-07-15 Sony International (Europe) Gmbh Structure and method for demodulation
AU2001253453A1 (en) * 2000-04-13 2001-10-30 Parkervision, Inc. Frequency converter
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US6748220B1 (en) 2000-05-05 2004-06-08 Nortel Networks Limited Resource allocation in wireless networks
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
JP2003060441A (en) * 2001-08-10 2003-02-28 Toshiba Corp Double balanced mixer circuit and orthogonal demodulator circuit using the same
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
WO2008139390A1 (en) 2007-05-11 2008-11-20 Nxp B.V. Dual-mode mixer circuit and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320531A (en) * 1979-04-02 1982-03-16 Dimon Donald F Time shared frequency conversion system
US4321549A (en) * 1980-05-06 1982-03-23 The United States Of America As Represented By The Secretary Of The Navy Switching quadrature detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320531A (en) * 1979-04-02 1982-03-16 Dimon Donald F Time shared frequency conversion system
US4321549A (en) * 1980-05-06 1982-03-23 The United States Of America As Represented By The Secretary Of The Navy Switching quadrature detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8594228B2 (en) 1999-04-16 2013-11-26 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion

Also Published As

Publication number Publication date
GB2324919A (en) 1998-11-04
GB9816663D0 (en) 1998-09-30

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20071009