USB507087I5 - - Google Patents

Info

Publication number
USB507087I5
USB507087I5 US50708774A USB507087I5 US B507087 I5 USB507087 I5 US B507087I5 US 50708774 A US50708774 A US 50708774A US B507087 I5 USB507087 I5 US B507087I5
Authority
US
United States
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
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 filed Critical
Priority to US05/507,087 priority Critical patent/US3991389A/en
Priority to GB2477075A priority patent/GB1477113A/en
Priority to FR7525144A priority patent/FR2285752A1/en
Priority to ES440226A priority patent/ES440226A1/en
Priority to DE19752536507 priority patent/DE2536507C3/en
Priority to CA233,997A priority patent/CA1058758A/en
Priority to JP9985275A priority patent/JPS5522984B2/ja
Priority to IT26599/75A priority patent/IT1041941B/en
Priority to CH1212175A priority patent/CH586974A5/xx
Publication of USB507087I5 publication Critical patent/USB507087I5/en
Application granted granted Critical
Publication of US3991389A publication Critical patent/US3991389A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
US05/507,087 1974-09-18 1974-09-18 Digital frequency shift key modulator Expired - Lifetime US3991389A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US05/507,087 US3991389A (en) 1974-09-18 1974-09-18 Digital frequency shift key modulator
GB2477075A GB1477113A (en) 1974-09-18 1975-06-10 Digital frequency shift key modulator
FR7525144A FR2285752A1 (en) 1974-09-18 1975-08-07 DIGITAL FREQUENCY JUMP MODULATOR
ES440226A ES440226A1 (en) 1974-09-18 1975-08-13 Digital frequency shift key modulator
DE19752536507 DE2536507C3 (en) 1974-09-18 1975-08-16 Digital frequency-keying modulator
CA233,997A CA1058758A (en) 1974-09-18 1975-08-19 Digital frequency shift key modulator
JP9985275A JPS5522984B2 (en) 1974-09-18 1975-08-19
IT26599/75A IT1041941B (en) 1974-09-18 1975-08-27 PERFECTED MODULATOR
CH1212175A CH586974A5 (en) 1974-09-18 1975-09-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/507,087 US3991389A (en) 1974-09-18 1974-09-18 Digital frequency shift key modulator

Publications (2)

Publication Number Publication Date
USB507087I5 true USB507087I5 (en) 1976-02-17
US3991389A US3991389A (en) 1976-11-09

Family

ID=24017201

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/507,087 Expired - Lifetime US3991389A (en) 1974-09-18 1974-09-18 Digital frequency shift key modulator

Country Status (8)

Country Link
US (1) US3991389A (en)
JP (1) JPS5522984B2 (en)
CA (1) CA1058758A (en)
CH (1) CH586974A5 (en)
ES (1) ES440226A1 (en)
FR (1) FR2285752A1 (en)
GB (1) GB1477113A (en)
IT (1) IT1041941B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083008A (en) * 1975-04-10 1978-04-04 Blaupunkt-Werke Gmbh Method and circuit for generation of digitally frequency-shiftable electric signals
US4090135A (en) * 1976-06-29 1978-05-16 The United States Of America As Represented By The Secretary Of The Interior Wireless FSK technique for telemetering underground data to the surface
US4153876A (en) * 1977-04-27 1979-05-08 Texas Instruments Incorporated Charge transfer device radio system
US4142245A (en) * 1977-08-22 1979-02-27 Texas Instruments Incorporated Multi-frequency digital wave synthesizer for providing analog output signals
US4130840A (en) * 1977-10-21 1978-12-19 Exxon Research & Engineering Co. Method and apparatus for coupling facsimile signals to a telephone network
JPS5537002A (en) * 1978-08-24 1980-03-14 Fujitsu Ltd Fs modulation system
US4302629A (en) * 1979-03-14 1981-11-24 Teltone Corporation Digital data transmission system
US4417349A (en) * 1979-11-08 1983-11-22 Digital Broadcasting Corporation SCA Data transmission system with a raised cosine filter
JPS58172250U (en) * 1982-05-11 1983-11-17 日立電子株式会社 MSK modulation circuit
JPS5952296A (en) * 1982-09-20 1984-03-26 カシオ計算機株式会社 Mandolin effect adding apparatus
US4475244A (en) * 1983-02-10 1984-10-02 John A. Neal Time-period modulation transmission system
US4577333A (en) * 1984-09-13 1986-03-18 Gridcomm Inc. Composite shift keying communication system
US4914396A (en) * 1987-09-21 1990-04-03 Acme Electric Corporation PWM waveform generator
US4878035A (en) * 1988-05-27 1989-10-31 Wavetek Rf Products, Inc. Hybrid frequency shift keying modulator and method
US5808285A (en) * 1990-09-17 1998-09-15 Metrologic Instruments, Inc. Portable code symbol reading device with one-way wireless data packet transmission link to base unit employing condition-dependent acoustical signalling for data packet reception acknowledgement
US7077327B1 (en) 1990-09-17 2006-07-18 Metrologic Instruments, Inc. System for reading bar code symbols using bar code readers having RF signal transmission links with base stations
US6460769B1 (en) 1991-09-17 2002-10-08 Metrologic Instruments, Inc. System for reading bar code symbols using portable bar code symbol readers having one-way RF signal transmission links with base stations
US6761317B1 (en) 1991-09-17 2004-07-13 Metrologic Instruments, Inc. Reading bar code symbols using readers having one-way RF signal transmission links with base stations
US6078226A (en) * 1998-02-02 2000-06-20 Tritech Microelectronics, Ltd. Integrated circuit implementation of a frequency shift keying oscillator
WO2005071828A1 (en) * 2004-01-22 2005-08-04 The Regents Of The University Of Michigan Demodulatr, chip and method for digitally demodulating an fsk signal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3600680A (en) * 1969-09-22 1971-08-17 Lignes Telegraph Telephon Fsk demodulator and modulator combining differentiated counted signals into a weighted analog output
US3659048A (en) * 1970-04-30 1972-04-25 Westinghouse Electric Corp Digital frequency change control system
US3668562A (en) * 1970-04-15 1972-06-06 Tel Tech Corp Frequency modulation system for transmitting binary information
US3713017A (en) * 1971-10-13 1973-01-23 Collins Radio Co Frequency shift keyed apparatus
US3773975A (en) * 1971-12-17 1973-11-20 Burroughs Corp Fsk digital transmitter
US3787785A (en) * 1972-05-15 1974-01-22 Collins Radio Co Phase representative digital signal modulating apparatus

Family Cites Families (1)

* 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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3600680A (en) * 1969-09-22 1971-08-17 Lignes Telegraph Telephon Fsk demodulator and modulator combining differentiated counted signals into a weighted analog output
US3668562A (en) * 1970-04-15 1972-06-06 Tel Tech Corp Frequency modulation system for transmitting binary information
US3659048A (en) * 1970-04-30 1972-04-25 Westinghouse Electric Corp Digital frequency change control system
US3713017A (en) * 1971-10-13 1973-01-23 Collins Radio Co Frequency shift keyed apparatus
US3773975A (en) * 1971-12-17 1973-11-20 Burroughs Corp Fsk digital transmitter
US3787785A (en) * 1972-05-15 1974-01-22 Collins Radio Co Phase representative digital signal modulating apparatus

Also Published As

Publication number Publication date
ES440226A1 (en) 1977-03-16
DE2536507A1 (en) 1976-04-01
FR2285752A1 (en) 1976-04-16
FR2285752B1 (en) 1977-12-16
JPS5522984B2 (en) 1980-06-20
DE2536507B2 (en) 1977-02-10
CH586974A5 (en) 1977-04-15
IT1041941B (en) 1980-01-10
JPS5176955A (en) 1976-07-03
GB1477113A (en) 1977-06-22
CA1058758A (en) 1979-07-17
US3991389A (en) 1976-11-09

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