GB1393071A - Circuit arrangement for a selective signal receiver - Google Patents

Circuit arrangement for a selective signal receiver

Info

Publication number
GB1393071A
GB1393071A GB55973A GB55973A GB1393071A GB 1393071 A GB1393071 A GB 1393071A GB 55973 A GB55973 A GB 55973A GB 55973 A GB55973 A GB 55973A GB 1393071 A GB1393071 A GB 1393071A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
modulator
input
output
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
GB55973A
Other languages
English (en)
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1393071A publication Critical patent/GB1393071A/en
Expired legal-status Critical Current

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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • 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)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB55973A 1972-01-11 1973-01-04 Circuit arrangement for a selective signal receiver Expired GB1393071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722201166 DE2201166A1 (de) 1972-01-11 1972-01-11 Schaltungsanordnung fuer einen selektiven signalempfaenger

Publications (1)

Publication Number Publication Date
GB1393071A true GB1393071A (en) 1975-05-07

Family

ID=5832734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55973A Expired GB1393071A (en) 1972-01-11 1973-01-04 Circuit arrangement for a selective signal receiver

Country Status (3)

Country Link
DE (1) DE2201166A1 (enExample)
FR (1) FR2167932B3 (enExample)
GB (1) GB1393071A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554658B1 (fr) * 1983-11-09 1986-09-05 Pinet Andre Procede de detection de signaux alternatifs transmis sur les lignes telephoniques

Also Published As

Publication number Publication date
FR2167932A1 (enExample) 1973-08-24
FR2167932B3 (enExample) 1976-01-09
DE2201166A1 (de) 1973-07-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees