CH387108A - Method for improving the interference sensitivity of audio frequency signals against the influence of hybrid circuits in signal receiving circuits of telecommunications systems with multi-frequency code selection - Google Patents

Method for improving the interference sensitivity of audio frequency signals against the influence of hybrid circuits in signal receiving circuits of telecommunications systems with multi-frequency code selection

Info

Publication number
CH387108A
CH387108A CH1278460A CH1278460A CH387108A CH 387108 A CH387108 A CH 387108A CH 1278460 A CH1278460 A CH 1278460A CH 1278460 A CH1278460 A CH 1278460A CH 387108 A CH387108 A CH 387108A
Authority
CH
Switzerland
Prior art keywords
circuits
influence
improving
signal receiving
telecommunications systems
Prior art date
Application number
CH1278460A
Other languages
German (de)
Inventor
Bendel Hermann
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of CH387108A publication Critical patent/CH387108A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Telephonic Communication Services (AREA)
CH1278460A 1959-11-27 1960-11-15 Method for improving the interference sensitivity of audio frequency signals against the influence of hybrid circuits in signal receiving circuits of telecommunications systems with multi-frequency code selection CH387108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES66021A DE1103400B (en) 1959-11-27 1959-11-27 Method and circuit arrangement for avoiding interference with the audio frequency signals as a result of the influence caused by electrical forks in the signal circuits of telephone systems with multi-frequency code dialing

Publications (1)

Publication Number Publication Date
CH387108A true CH387108A (en) 1965-01-31

Family

ID=7498486

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1278460A CH387108A (en) 1959-11-27 1960-11-15 Method for improving the interference sensitivity of audio frequency signals against the influence of hybrid circuits in signal receiving circuits of telecommunications systems with multi-frequency code selection

Country Status (5)

Country Link
BE (1) BE597354A (en)
CH (1) CH387108A (en)
DE (1) DE1103400B (en)
GB (1) GB958385A (en)
NL (1) NL258188A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE936879C (en) * 1952-07-15 1955-12-22 Heinrich Dipl-Ing Gerwig Self-voting system
DE1007382B (en) * 1954-06-22 1957-05-02 Siemens Ag Electrical signal receiver for receiving voltages of a signal composed of at least two frequencies
DE1015487B (en) * 1955-06-03 1957-09-12 Standard Elektrik Ag Circuit arrangement for equalizing different signal levels in a receiving device for signals according to the frequency code system

Also Published As

Publication number Publication date
DE1103400B (en) 1961-03-30
BE597354A (en) 1961-03-15
NL258188A (en)
GB958385A (en) 1964-05-21

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