DE3369621D1 - Transmitter circuit for modems using frequency shift modulation - Google Patents

Transmitter circuit for modems using frequency shift modulation

Info

Publication number
DE3369621D1
DE3369621D1 DE8383200903T DE3369621T DE3369621D1 DE 3369621 D1 DE3369621 D1 DE 3369621D1 DE 8383200903 T DE8383200903 T DE 8383200903T DE 3369621 T DE3369621 T DE 3369621T DE 3369621 D1 DE3369621 D1 DE 3369621D1
Authority
DE
Germany
Prior art keywords
modems
frequency shift
transmitter circuit
shift modulation
modulation
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
Application number
DE8383200903T
Other languages
English (en)
Inventor
Robert Boudault
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Application granted granted Critical
Publication of DE3369621D1 publication Critical patent/DE3369621D1/de
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8383200903T 1982-06-25 1983-06-20 Transmitter circuit for modems using frequency shift modulation Expired DE3369621D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8211203A FR2529418A1 (fr) 1982-06-25 1982-06-25 Circuit d'emission pour des modems utilisant la modulation par deplacement de frequence

Publications (1)

Publication Number Publication Date
DE3369621D1 true DE3369621D1 (en) 1987-03-05

Family

ID=9275419

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383200903T Expired DE3369621D1 (en) 1982-06-25 1983-06-20 Transmitter circuit for modems using frequency shift modulation

Country Status (7)

Country Link
US (1) US4573165A (de)
EP (1) EP0098003B1 (de)
JP (1) JPS5947863A (de)
AU (1) AU573701B2 (de)
CA (1) CA1203577A (de)
DE (1) DE3369621D1 (de)
FR (1) FR2529418A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659031A (en) * 1969-10-10 1972-04-25 Nippon Musical Instruments Mfg Monophonic electronic musical instrument with a variable frequency oscillator employing positive feed back
US3659048A (en) * 1970-04-30 1972-04-25 Westinghouse Electric Corp Digital frequency change control system
US3878484A (en) * 1974-01-11 1975-04-15 Hekimian Laboratories Inc Oscillator having output frequency linearly related to resistance
YU35812B (en) * 1975-03-26 1981-06-30 Iskra Zp Z O Sub O Voltage/frequency converter circuit
US4232862A (en) * 1979-02-01 1980-11-11 Michael Mason Obstacle safety device
FR2453536A1 (fr) * 1979-04-06 1980-10-31 Trt Telecom Radio Electr Modulateur a deplacement de frequence
US4320521A (en) * 1980-07-25 1982-03-16 National Semiconductor Corporation Data bus transceiver
FR2530094B1 (fr) * 1982-07-07 1988-05-13 Trt Telecom Radio Electr Modulateur pour transmission de donnees analogiques

Also Published As

Publication number Publication date
CA1203577A (en) 1986-04-22
AU573701B2 (en) 1988-06-16
FR2529418B1 (de) 1984-12-28
JPS5947863A (ja) 1984-03-17
US4573165A (en) 1986-02-25
EP0098003B1 (de) 1987-01-28
EP0098003A2 (de) 1984-01-11
FR2529418A1 (fr) 1983-12-30
EP0098003A3 (en) 1985-01-23
AU1620483A (en) 1984-01-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee