DE3062680D1 - Frequency comparing circuit and selective calling device comprising such a circuit - Google Patents

Frequency comparing circuit and selective calling device comprising such a circuit

Info

Publication number
DE3062680D1
DE3062680D1 DE8080400336T DE3062680T DE3062680D1 DE 3062680 D1 DE3062680 D1 DE 3062680D1 DE 8080400336 T DE8080400336 T DE 8080400336T DE 3062680 T DE3062680 T DE 3062680T DE 3062680 D1 DE3062680 D1 DE 3062680D1
Authority
DE
Germany
Prior art keywords
circuit
calling device
selective calling
frequency comparing
comparing circuit
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
DE8080400336T
Other languages
English (en)
Inventor
Henri Butin
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Application granted granted Critical
Publication of DE3062680D1 publication Critical patent/DE3062680D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Manipulation Of Pulses (AREA)
DE8080400336T 1979-03-16 1980-03-14 Frequency comparing circuit and selective calling device comprising such a circuit Expired DE3062680D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7906742A FR2451691A1 (fr) 1979-03-16 1979-03-16 Circuit comparateur de frequences et dispositif d'appel selectif comportant un tel circuit

Publications (1)

Publication Number Publication Date
DE3062680D1 true DE3062680D1 (en) 1983-05-19

Family

ID=9223210

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080400336T Expired DE3062680D1 (en) 1979-03-16 1980-03-14 Frequency comparing circuit and selective calling device comprising such a circuit

Country Status (4)

Country Link
US (1) US4322686A (de)
EP (1) EP0016692B1 (de)
DE (1) DE3062680D1 (de)
FR (1) FR2451691A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1259146A (en) * 1986-11-26 1989-09-05 Anthony K.D. Brown Dial tone detector
US4864158A (en) * 1988-01-28 1989-09-05 Amtech Corporation Rapid signal validity checking apparatus
US7873130B2 (en) * 2005-08-10 2011-01-18 Ludwig Lester F Frequency comparator utilizing enveloping-event detection via symbolic dynamics of fixed or modulated waveforms

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818358A (en) * 1972-12-29 1974-06-18 Stromberg Carlson Corp Noise rejection circuit for digital systems
GB1482629A (en) * 1973-09-11 1977-08-10 Trend Communications Ltd Tone detectors
US3942125A (en) * 1975-01-08 1976-03-02 Gte Automatic Electric Laboratories Incorporated Digital repetition rate check circuit
DE2515769A1 (de) * 1975-04-10 1976-10-21 Standard Elektrik Lorenz Ag Frequenzselektiver signalempfaenger
US4128812A (en) * 1977-08-09 1978-12-05 The United States Of America As Represented By The Secretary Of The Army Phase discriminator
US4220924A (en) * 1978-03-16 1980-09-02 Osann Robert Jr Digital phase decoding technique for quadrature phased signals
US4169264A (en) * 1978-07-03 1979-09-25 Sperry Rand Corporation Synchronous digital delay line pulse spacing decoder

Also Published As

Publication number Publication date
FR2451691B1 (de) 1981-10-30
EP0016692A1 (de) 1980-10-01
FR2451691A1 (fr) 1980-10-10
US4322686A (en) 1982-03-30
EP0016692B1 (de) 1983-04-13

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee