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JPS5537002A - Fs modulation system - Google Patents

Fs modulation system

Info

Publication number
JPS5537002A
JPS5537002A JP10300778A JP10300778A JPS5537002A JP S5537002 A JPS5537002 A JP S5537002A JP 10300778 A JP10300778 A JP 10300778A JP 10300778 A JP10300778 A JP 10300778A JP S5537002 A JPS5537002 A JP S5537002A
Authority
JP
Japan
Prior art keywords
output
ctr
frequencies
pulse
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.)
Pending
Application number
JP10300778A
Other languages
English (en)
Inventor
Kiyoshi Shibuya
Hitoshi Shirai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10300778A priority Critical patent/JPS5537002A/ja
Publication of JPS5537002A publication Critical patent/JPS5537002A/ja
Priority to US06/275,293 priority patent/US4368439A/en
Pending 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)
  • Manipulation Of Pulses (AREA)
JP10300778A 1978-08-24 1978-08-24 Fs modulation system Pending JPS5537002A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10300778A JPS5537002A (en) 1978-08-24 1978-08-24 Fs modulation system
US06/275,293 US4368439A (en) 1978-08-24 1981-06-19 Frequency shift keying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10300778A JPS5537002A (en) 1978-08-24 1978-08-24 Fs modulation system

Publications (1)

Publication Number Publication Date
JPS5537002A true JPS5537002A (en) 1980-03-14

Family

ID=14342593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10300778A Pending JPS5537002A (en) 1978-08-24 1978-08-24 Fs modulation system

Country Status (2)

Country Link
US (1) US4368439A (ja)
JP (1) JPS5537002A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547751A (en) * 1982-05-07 1985-10-15 Hitachi, Ltd. System for frequency modulation

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171475A (ja) * 1984-02-15 1985-09-04 アイデンティフィケ−ション・デバイセス・インコ−ポレ−テッド 識別システム
US4682344A (en) * 1985-07-30 1987-07-21 Amp Incorporated Rf fsk transmitter
US4816822A (en) * 1986-02-14 1989-03-28 Ryan Instruments, Inc. Remote environmental monitor system
JP2925158B2 (ja) * 1988-07-29 1999-07-28 株式会社東芝 変調器および送信器
US5057829A (en) * 1989-03-02 1991-10-15 Secom Information Products Company Computer networking apparatus
US5014285A (en) * 1989-09-27 1991-05-07 General Electric Company Frequency shift keying communication system with selectable carrier frequencies
IT1270935B (it) * 1993-05-12 1997-05-16 Sixtel Spa Dispositivo di comunicazione per reti informatiche, particolarmente del tipo cordless
WO1995012925A1 (en) * 1993-11-01 1995-05-11 Omnipoint Corporation Dual-mode wireless unit with two spread-spectrum frequency bands
TW256900B (ja) * 1993-11-25 1995-09-11 Alps Electric Co Ltd
JPH0884385A (ja) * 1994-09-14 1996-03-26 Tokai Rika Co Ltd 送信装置
JP3011040B2 (ja) * 1994-12-22 2000-02-21 双葉電子工業株式会社 Ｐｌｌ方式高周波モジュール
KR100193812B1 (ko) * 1995-12-26 1999-06-15 윤종용 2레벨/4레벨 주파수 쉬프트키잉 변조방식 구현 회로
US6833790B2 (en) 2002-04-12 2004-12-21 Digital Angel Corporation Livestock chute scanner
US6711528B2 (en) * 2002-04-22 2004-03-23 Harris Corporation Blind source separation utilizing a spatial fourth order cumulant matrix pencil
US7881409B2 (en) * 2004-01-22 2011-02-01 The Regents Of The University Of Michigan Demodulator, chip and method for digitally demodulating an FSK signal
DE102005043485A1 (de) * 2005-09-13 2007-03-15 Abb Patent Gmbh Automatisierungstechnische Einrichtung
US7733980B2 (en) * 2006-07-14 2010-06-08 International Business Machines Corporation Quadrature modulation circuits and systems supporting multiple modulation modes at gigabit data rates

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102238A (en) * 1961-11-13 1963-08-27 Collins Radio Co Encoder with one frequency indicating one binary logic state and another frequency indicating other state
US3205441A (en) * 1962-10-01 1965-09-07 Western Union Telegraph Co Frequency shift signaling system
JPS4987267A (ja) * 1972-08-21 1974-08-21

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740669A (en) * 1971-11-01 1973-06-19 Rca Corp M-ary fsk digital modulator
US3991389A (en) * 1974-09-18 1976-11-09 International Business Machines Corporation Digital frequency shift key modulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102238A (en) * 1961-11-13 1963-08-27 Collins Radio Co Encoder with one frequency indicating one binary logic state and another frequency indicating other state
US3205441A (en) * 1962-10-01 1965-09-07 Western Union Telegraph Co Frequency shift signaling system
JPS4987267A (ja) * 1972-08-21 1974-08-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547751A (en) * 1982-05-07 1985-10-15 Hitachi, Ltd. System for frequency modulation

Also Published As

Publication number Publication date
US4368439A (en) 1983-01-11

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