GB2324919B - Modulation and frequency conversion by time sharing - Google Patents
Modulation and frequency conversion by time sharingInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
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)
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)
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 |
US6694128B1 (en) | 1998-08-18 | 2004-02-17 | Parkervision, Inc. | Frequency synthesizer using universal frequency translation technology |
US6370371B1 (en) | 1998-10-21 | 2002-04-09 | Parkervision, Inc. | 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 |
US7039372B1 (en) | 1998-10-21 | 2006-05-02 | Parkervision, Inc. | Method and system for frequency up-conversion with modulation embodiments |
US6560301B1 (en) | 1998-10-21 | 2003-05-06 | Parkervision, Inc. | Integrated frequency translation and selectivity with a variety of filter 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 |
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 |
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 |
ATE506743T1 (en) | 2007-05-11 | 2011-05-15 | Nxp Bv | BIMODAL MIXER CIRCUIT AND METHOD |
Citations (2)
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 |
-
1995
- 1995-10-09 GB GB9816663A patent/GB2324919B/en not_active Expired - Fee Related
Patent Citations (2)
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)
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 |