ZA847344B - Zero if frequency modulator - Google Patents
Zero if frequency modulatorInfo
- Publication number
- ZA847344B ZA847344B ZA847344A ZA847344A ZA847344B ZA 847344 B ZA847344 B ZA 847344B ZA 847344 A ZA847344 A ZA 847344A ZA 847344 A ZA847344 A ZA 847344A ZA 847344 B ZA847344 B ZA 847344B
- Authority
- ZA
- South Africa
- Prior art keywords
- zero
- frequency modulator
- modulator
- frequency
- Prior art date
Links
Classifications
-
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/538,045 US4540958A (en) | 1983-09-30 | 1983-09-30 | Zero if frequency-modulator |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA847344B true ZA847344B (en) | 1985-09-25 |
Family
ID=24145204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA847344A ZA847344B (en) | 1983-09-30 | 1984-09-18 | Zero if frequency modulator |
Country Status (9)
Country | Link |
---|---|
US (1) | US4540958A (pt) |
EP (1) | EP0140169B1 (pt) |
JP (1) | JPS6093861A (pt) |
KR (1) | KR850002708A (pt) |
AU (1) | AU3343784A (pt) |
BR (1) | BR8404682A (pt) |
DE (1) | DE3467961D1 (pt) |
FI (1) | FI843826L (pt) |
ZA (1) | ZA847344B (pt) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2542145B1 (fr) * | 1983-03-02 | 1985-06-07 | Thomson Csf | Diviseur de frequence par deux, analogique et aperiodique |
DE3582275D1 (de) * | 1984-05-02 | 1991-05-02 | Philips Nv | Verfahren und anordnung zur ermittlung einer kernmagnetisierungsverteilung in einem teil eines koerpers. |
US4626803A (en) * | 1985-12-30 | 1986-12-02 | General Electric Company | Apparatus for providing a carrier signal with two digital data streams I-Q modulated thereon |
US4726039A (en) * | 1986-05-09 | 1988-02-16 | Honeywell Inc. | Constant amplitude PSK modulator |
US4717894A (en) * | 1986-10-23 | 1988-01-05 | Hewlett-Packard Company | Calibration of vector modulators using a scalar detector |
US4811425A (en) * | 1987-01-09 | 1989-03-07 | Itt Avionics, A Division Of Itt Corporation | Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers |
US4843351A (en) * | 1987-08-28 | 1989-06-27 | Hewlett-Packard Company | Vector modulation signal generator |
FI83005C (fi) * | 1988-08-19 | 1991-05-10 | Nokia Mobira Oy | Kretsanordning foer generering av i,q-vaogformer. |
US4968956A (en) * | 1989-12-04 | 1990-11-06 | Trw Inc. | Microwave phase modulator having a quadrature path with phase offset |
US5079526A (en) * | 1990-08-29 | 1992-01-07 | Motorola, Inc. | Frequency modulated synthesizer using low frequency offset mixed VCO |
US5111163A (en) * | 1991-05-06 | 1992-05-05 | Hughes Aircraft Company | Digital FM modulator |
US5373265A (en) * | 1993-07-06 | 1994-12-13 | At&T Corp. | Modulator having oscillator for generating IF and RF signals by division and up-conversion |
US5596606A (en) * | 1994-04-05 | 1997-01-21 | Scientific-Atlanta, Inc. | Synchronous detector and methods for synchronous detection |
US5412352A (en) * | 1994-04-18 | 1995-05-02 | Stanford Telecommunications, Inc. | Modulator having direct digital synthesis for broadband RF transmission |
FI98330C (fi) * | 1994-12-15 | 1997-05-26 | Nokia Mobile Phones Ltd | UHF-syntesoija |
JPH1174732A (ja) * | 1997-08-29 | 1999-03-16 | Ando Electric Co Ltd | 直交変調器によるfm変調装置 |
AU2001253843A1 (en) * | 2000-03-08 | 2001-09-17 | Spike Broadband Systems, Inc. | Direct conversion up-converter for broadband wireless access equipment |
US8127326B2 (en) | 2000-11-14 | 2012-02-28 | Claussen Paul J | Proximity detection using wireless connectivity in a communications system |
CA2428946C (en) | 2000-11-14 | 2010-06-22 | Scientific-Atlanta, Inc. | Networked subscriber television distribution |
KR100441744B1 (ko) * | 2001-11-16 | 2004-07-27 | 한국전자통신연구원 | 50 메가헤르쯔 대역을 이용하여 155 메가비피에스기저대역 신호를 전송하기 위한 대역 변조 방법 및 그시스템 |
US7516470B2 (en) | 2002-08-02 | 2009-04-07 | Cisco Technology, Inc. | Locally-updated interactive program guide |
US20040068753A1 (en) * | 2002-10-02 | 2004-04-08 | Robertson Neil C. | Video transmission systems and methods for a home network |
US7908625B2 (en) | 2002-10-02 | 2011-03-15 | Robertson Neil C | Networked multimedia system |
US7360235B2 (en) | 2002-10-04 | 2008-04-15 | Scientific-Atlanta, Inc. | Systems and methods for operating a peripheral record/playback device in a networked multimedia system |
US7545935B2 (en) | 2002-10-04 | 2009-06-09 | Scientific-Atlanta, Inc. | Networked multimedia overlay system |
US8046806B2 (en) | 2002-10-04 | 2011-10-25 | Wall William E | Multiroom point of deployment module |
US8094640B2 (en) | 2003-01-15 | 2012-01-10 | Robertson Neil C | Full duplex wideband communications system for a local coaxial network |
US7487532B2 (en) | 2003-01-15 | 2009-02-03 | Cisco Technology, Inc. | Optimization of a full duplex wideband communications system |
US7876998B2 (en) | 2005-10-05 | 2011-01-25 | Wall William E | DVD playback over multi-room by copying to HDD |
JP2008051446A (ja) * | 2006-08-28 | 2008-03-06 | Calsonic Kansei Corp | 蓄熱器と蓄熱器を用いた車載熱システム |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1304188A (pt) * | 1969-12-09 | 1973-01-24 | ||
US3818378A (en) * | 1972-02-10 | 1974-06-18 | Us Navy | Phase derivative modulation method and apparatus |
DE2363214C3 (de) * | 1973-12-19 | 1979-07-12 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Anordnung zur Phasenmodulation |
US3924186A (en) * | 1974-02-07 | 1975-12-02 | Ncr Co | Staggered quadriphase differential encoder and decoder |
DE2511980A1 (de) * | 1975-03-19 | 1976-09-30 | Vdo Schindling | Oszillatorschaltung |
US4028641A (en) * | 1976-05-11 | 1977-06-07 | Bell Telephone Laboratories, Incorporated | Linear phase modulator including a pair of Armstrong modulators |
US4438413A (en) * | 1981-05-29 | 1984-03-20 | Motorola Inc. | Serial minimum shift keyed modulator including notch and bandpass filters |
-
1983
- 1983-09-30 US US06/538,045 patent/US4540958A/en not_active Expired - Lifetime
-
1984
- 1984-09-18 ZA ZA847344A patent/ZA847344B/xx unknown
- 1984-09-19 BR BR8404682A patent/BR8404682A/pt unknown
- 1984-09-24 AU AU33437/84A patent/AU3343784A/en not_active Abandoned
- 1984-09-27 EP EP84111526A patent/EP0140169B1/en not_active Expired
- 1984-09-27 DE DE8484111526T patent/DE3467961D1/de not_active Expired
- 1984-09-28 FI FI843826A patent/FI843826L/fi not_active Application Discontinuation
- 1984-09-29 KR KR1019840006054A patent/KR850002708A/ko not_active Application Discontinuation
- 1984-09-29 JP JP59203027A patent/JPS6093861A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6093861A (ja) | 1985-05-25 |
EP0140169A1 (en) | 1985-05-08 |
KR850002708A (ko) | 1985-05-15 |
AU3343784A (en) | 1985-04-04 |
BR8404682A (pt) | 1985-08-13 |
JPH0462487B2 (pt) | 1992-10-06 |
FI843826A0 (fi) | 1984-09-28 |
US4540958A (en) | 1985-09-10 |
EP0140169B1 (en) | 1987-12-02 |
DE3467961D1 (en) | 1988-01-14 |
FI843826L (fi) | 1985-03-31 |
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