IT942683B - Sintetizzatore di frequenza parti colarmente per sistemi di modula zion demodulazione dei dati - Google Patents

Sintetizzatore di frequenza parti colarmente per sistemi di modula zion demodulazione dei dati

Info

Publication number
IT942683B
IT942683B IT70367/71A IT7036771A IT942683B IT 942683 B IT942683 B IT 942683B IT 70367/71 A IT70367/71 A IT 70367/71A IT 7036771 A IT7036771 A IT 7036771A IT 942683 B IT942683 B IT 942683B
Authority
IT
Italy
Prior art keywords
colarly
frequency synthesizer
data demodulation
modulation systems
systems data
Prior art date
Application number
IT70367/71A
Other languages
English (en)
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Application granted granted Critical
Publication of IT942683B publication Critical patent/IT942683B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size
    • G06F1/0353—Reduction of table size by using symmetrical properties of the function, e.g. using most significant bits for quadrant control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT70367/71A 1970-10-14 1971-10-13 Sintetizzatore di frequenza parti colarmente per sistemi di modula zion demodulazione dei dati IT942683B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4886470 1970-10-14

Publications (1)

Publication Number Publication Date
IT942683B true IT942683B (it) 1973-04-02

Family

ID=10450213

Family Applications (1)

Application Number Title Priority Date Filing Date
IT70367/71A IT942683B (it) 1970-10-14 1971-10-13 Sintetizzatore di frequenza parti colarmente per sistemi di modula zion demodulazione dei dati

Country Status (6)

Country Link
US (1) US3772681A (it)
DE (1) DE2151281A1 (it)
FR (1) FR2111365A5 (it)
IL (1) IL37924A0 (it)
IT (1) IT942683B (it)
NL (1) NL7114034A (it)

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FR2098528A5 (it) * 1970-07-17 1972-03-10 Lannionnais Electronique
US4581715A (en) * 1970-12-28 1986-04-08 Hyatt Gilbert P Fourier transform processor
US5459846A (en) * 1988-12-02 1995-10-17 Hyatt; Gilbert P. Computer architecture system having an imporved memory
US4553213A (en) * 1970-12-28 1985-11-12 Hyatt Gilbert P Communication system
US4944036A (en) * 1970-12-28 1990-07-24 Hyatt Gilbert P Signature filter system
US4491930A (en) * 1970-12-28 1985-01-01 Hyatt Gilbert P Memory system using filterable signals
US4686655A (en) * 1970-12-28 1987-08-11 Hyatt Gilbert P Filtering system for processing signature signals
US4744042A (en) * 1970-12-28 1988-05-10 Hyatt Gilbert P Transform processor system having post processing
US4553221A (en) * 1970-12-28 1985-11-12 Hyatt Gilbert P Digital filtering system
US4551816A (en) * 1970-12-28 1985-11-05 Hyatt Gilbert P Filter display system
US5053983A (en) * 1971-04-19 1991-10-01 Hyatt Gilbert P Filter system having an adaptive control for updating filter samples
US3904949A (en) * 1974-01-31 1975-09-09 Rohr Industries Inc Apparatus and method for increasing the sinusoidal line-to-line output voltage level of any multi-phase power amplifier operating at a maximum line-to-ground output voltage level
FR2269250B1 (it) * 1974-04-29 1979-10-19 Cit Alcatel
FR2286552A1 (fr) * 1974-09-30 1976-04-23 Roche Bernard Generateur numerique de signaux du code a multifrequences
US3959604A (en) * 1975-04-07 1976-05-25 International Business Machines Corporation Digital calling signal tone generating circuitry
US4061886A (en) * 1975-09-29 1977-12-06 Mostek Corporation Dual tone multiple frequency generator
US4250558A (en) * 1976-01-29 1981-02-10 The Babcock & Wilcox Company Hybrid analog function generator
US4070665A (en) * 1976-05-27 1978-01-24 The Singer Company High accuracy digital to analog resolver converter
US4142245A (en) * 1977-08-22 1979-02-27 Texas Instruments Incorporated Multi-frequency digital wave synthesizer for providing analog output signals
US4402067A (en) * 1978-02-21 1983-08-30 Moss William E Bidirectional dual port serially controlled programmable read-only memory
US4192007A (en) * 1978-05-30 1980-03-04 Lorain Products Corporation Programmable ringing generator
DE2826870A1 (de) * 1978-06-19 1980-01-03 Siemens Ag Halbleitergeraet zur reproduktion akustischer signale
FR2434526A1 (fr) * 1978-08-23 1980-03-21 Telediffusion Fse Modulateur-demodulateur numerique a modulation a deplacement de frequence pour ligne a " 2 fils "
DE2906471A1 (de) * 1979-02-20 1980-08-28 Siemens Ag Schaltungsanordnung zur sequentiellen erzeugung der funktionswerte mehrerer schwingungen, deren folgefrequenzen n-fache einer grundschwingung sind
US4283768A (en) * 1979-04-30 1981-08-11 The United States Of America As Represented By The Secretary Of The Navy Signal generator
US4315219A (en) * 1980-04-07 1982-02-09 Canadian Patents & Development Limited Amplitude controlled digital oscillator
US4348734A (en) * 1980-07-10 1982-09-07 Reliance Electric Company Converter by stored switching pattern
US4410954A (en) * 1980-10-08 1983-10-18 Rockwell International Corporation Digital frequency synthesizer with random jittering for reducing discrete spectral spurs
US4410955A (en) * 1981-03-30 1983-10-18 Motorola, Inc. Method and apparatus for digital shaping of a digital data stream
FR2512293B1 (fr) * 1981-08-28 1985-12-27 Telecommunications Sa Procede de codage d'une frequence et dispositif generateur de tonalites obtenu par le procede
US4525795A (en) * 1982-07-16 1985-06-25 At&T Bell Laboratories Digital signal generator
US4494073A (en) * 1982-09-27 1985-01-15 Cubic Corporation Frequency generator using composite digitally controlled oscillators
US4599583A (en) * 1983-11-19 1986-07-08 Fujitsu Limited Mixed dual frequency generating system
US4620291A (en) * 1984-02-06 1986-10-28 Mcdonnell Douglas Corporation Digital-to-analog converter interpolator
NL8402318A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.
GB8432552D0 (en) * 1984-12-21 1985-02-06 Plessey Co Plc Control circuits
US4773022A (en) * 1985-02-01 1988-09-20 Analogic Corporation Electrical waveform generator means and methods
US5029120A (en) * 1985-02-01 1991-07-02 Analogic Corporation Electrical wavefrom generator means and methods
JPS62501997A (ja) * 1985-02-01 1987-08-06 アナロジック・コ−ポレ−ション 電気的波形発生器
EP0195573B1 (en) * 1985-03-15 1990-10-24 THORN EMI Patents Limited Spread-spectrum signal generator
US4766560A (en) * 1985-12-23 1988-08-23 Xerox Corporation Parallel/pipelined arithmetic variable clock frequency synthesizer
US4823090A (en) * 1987-10-02 1989-04-18 Tektronix, Inc. Digital signal synthesis using low frequency sampling clock
US4943779A (en) * 1988-05-19 1990-07-24 Worcester Polytechnic Institute Digital sweep generator
DE3829985C2 (de) * 1988-09-03 1995-05-11 Fraunhofer Ges Forschung Digitaler Synthesizer
US5031131A (en) * 1988-11-14 1991-07-09 Eaton Corporation Direct digital synthesizer
US4935891A (en) * 1988-12-22 1990-06-19 Xerox Corporation Pseudo-random phase shifted arithmetic bit clock generators for digital printers
DE58907950D1 (de) * 1988-12-23 1994-07-28 Siemens Ag Albis Frequenzsynthesegerät.
GB2229334A (en) * 1989-03-17 1990-09-19 Philips Electronic Associated Pulse generators
US5039872A (en) * 1989-09-28 1991-08-13 The United States Of America As Represented By The Secretary Of Commerce Digitally synthesized audio frequency voltage source
US5237324A (en) * 1991-09-04 1993-08-17 Advanced Micro Devices, Inc. System and method for producing baseband analog modulation signals
US5329260A (en) * 1992-07-17 1994-07-12 Ii Morrow Inc. Numerically-controlled modulated oscillator and modulation method
JP3226884B2 (ja) * 1999-01-26 2001-11-05 エヌイーシーマイクロシステム株式会社 周期関数生成回路
US20160301414A1 (en) * 2013-12-28 2016-10-13 Intel Corporation Dynamic Interconnect with Partitioning on Emulation and Protyping Platforms

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US3497625A (en) * 1965-07-15 1970-02-24 Sylvania Electric Prod Digital modulation and demodulation in a communication system
US3641565A (en) * 1969-09-02 1972-02-08 Dynamics Res Corp Digital resolver
JPS5032582B1 (it) * 1969-09-12 1975-10-22
US3641566A (en) * 1969-09-29 1972-02-08 Gen Electric Frequency polyphase power supply

Also Published As

Publication number Publication date
US3772681A (en) 1973-11-13
FR2111365A5 (it) 1972-06-02
IL37924A0 (en) 1971-12-29
NL7114034A (it) 1972-04-18
DE2151281A1 (de) 1972-04-20

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