CH504823A - Dispositif récepteur numérique de fréquences - Google Patents

Dispositif récepteur numérique de fréquences

Info

Publication number
CH504823A
CH504823A CH1091769A CH1091769A CH504823A CH 504823 A CH504823 A CH 504823A CH 1091769 A CH1091769 A CH 1091769A CH 1091769 A CH1091769 A CH 1091769A CH 504823 A CH504823 A CH 504823A
Authority
CH
Switzerland
Prior art keywords
receiver device
frequency receiver
digital frequency
digital
receiver
Prior art date
Application number
CH1091769A
Other languages
English (en)
Inventor
Jacob Jean-Baptiste
Lavanant Pierre
Original Assignee
Cit Alcatel
Lannionnais Electronique
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 Cit Alcatel, Lannionnais Electronique filed Critical Cit Alcatel
Publication of CH504823A publication Critical patent/CH504823A/fr

Links

Classifications

    • 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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Complex Calculations (AREA)
  • Interface Circuits In Exchanges (AREA)
CH1091769A 1968-07-30 1969-07-17 Dispositif récepteur numérique de fréquences CH504823A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR161172 1968-07-30

Publications (1)

Publication Number Publication Date
CH504823A true CH504823A (fr) 1971-03-15

Family

ID=8653211

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1091769A CH504823A (fr) 1968-07-30 1969-07-17 Dispositif récepteur numérique de fréquences

Country Status (8)

Country Link
US (1) US3683162A (fr)
BE (1) BE736262A (fr)
CH (1) CH504823A (fr)
DE (1) DE1938804C3 (fr)
FR (1) FR1603175A (fr)
GB (1) GB1271528A (fr)
NL (1) NL6911559A (fr)
SE (1) SE344527B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116224B1 (fr) * 1970-10-29 1974-10-31 Ibm France
FR2164544B1 (fr) * 1971-12-21 1974-09-27 Ibm France
US3732409A (en) * 1972-03-20 1973-05-08 Nasa Counting digital filters
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences
JPS5827546B2 (ja) * 1975-04-22 1983-06-10 日本電気株式会社 エンザンソウチ
DE2659512B1 (de) * 1976-12-30 1978-05-24 Wandel & Goltermann Verfahren und Schaltungsanordnung zum Erzeugen eines Digitalsignals zum Pruefen einer PCM-Endstelle
CA1111531A (fr) * 1979-02-22 1981-10-27 Jackylene K. Hood Recepteur de tonalites mic
US4203008A (en) * 1979-02-26 1980-05-13 Northern Telecom Limited Digital signalling receiver for receiving PCM tones
US4354248A (en) * 1979-11-28 1982-10-12 Motorola, Inc. Programmable multifrequency tone receiver
FR2485843B1 (fr) * 1980-06-25 1986-11-07 Cit Alcatel Recepteur numerique de frequences
FR2512306A1 (fr) * 1981-08-27 1983-03-04 Telecommunications Sa Dispositif numerique de reconnaissance de frequences
US6140568A (en) * 1997-11-06 2000-10-31 Innovative Music Systems, Inc. System and method for automatically detecting a set of fundamental frequencies simultaneously present in an audio signal
CN112042161B (zh) * 2018-01-26 2023-09-26 加州理工学院 通过在零点上调制数据来进行通信的系统和方法
US10804982B2 (en) 2019-02-07 2020-10-13 California Institute Of Technology Systems and methods for communicating by modulating data on zeros in the presence of channel impairments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099742A (en) * 1959-03-13 1963-07-30 Westinghouse Air Brake Co Digital flow computer employing a logarithmic mode of computation
US3288940A (en) * 1963-10-24 1966-11-29 Automatic Elect Lab Multifrequency signal receiver
US3404231A (en) * 1965-01-05 1968-10-01 Bell Telephone Labor Inc Framing of pulse code transmission systems by use of an added tone signal
US3521042A (en) * 1967-07-19 1970-07-21 Ibm Simplified digital filter

Also Published As

Publication number Publication date
US3683162A (en) 1972-08-08
DE1938804B2 (de) 1979-05-23
DE1938804C3 (de) 1980-02-21
FR1603175A (fr) 1971-03-22
SE344527B (fr) 1972-04-17
NL6911559A (fr) 1970-02-03
DE1938804A1 (de) 1970-02-05
BE736262A (fr) 1970-01-19
GB1271528A (en) 1972-04-19

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Legal Events

Date Code Title Description
PL Patent ceased