ATA759178A - CIRCUIT ARRANGEMENT FOR THE SAFE DETECTION OF SINE-SHAPED TONE FREQUENCY SIGNALS WITH A PRE-DETERMINED FREQUENCY - Google Patents

CIRCUIT ARRANGEMENT FOR THE SAFE DETECTION OF SINE-SHAPED TONE FREQUENCY SIGNALS WITH A PRE-DETERMINED FREQUENCY

Info

Publication number
ATA759178A
ATA759178A AT0759178A AT759178A ATA759178A AT A759178 A ATA759178 A AT A759178A AT 0759178 A AT0759178 A AT 0759178A AT 759178 A AT759178 A AT 759178A AT A759178 A ATA759178 A AT A759178A
Authority
AT
Austria
Prior art keywords
sine
circuit arrangement
safe detection
frequency signals
shaped tone
Prior art date
Application number
AT0759178A
Other languages
German (de)
Other versions
AT370578B (en
Original Assignee
Telefonbau & Normalzeit Gmbh
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 Telefonbau & Normalzeit Gmbh filed Critical Telefonbau & Normalzeit Gmbh
Publication of ATA759178A publication Critical patent/ATA759178A/en
Application granted granted Critical
Publication of AT370578B publication Critical patent/AT370578B/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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Machine Translation (AREA)
  • Semiconductor Integrated Circuits (AREA)
AT0759178A 1978-08-05 1978-10-23 CIRCUIT ARRANGEMENT FOR THE SAFE DETECTION OF SINE-SHAPED TONE FREQUENCY SIGNALS WITH A PRE-DETERMINED FREQUENCY AT370578B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2834405 1978-08-05

Publications (2)

Publication Number Publication Date
ATA759178A true ATA759178A (en) 1982-08-15
AT370578B AT370578B (en) 1983-04-11

Family

ID=6046323

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0759178A AT370578B (en) 1978-08-05 1978-10-23 CIRCUIT ARRANGEMENT FOR THE SAFE DETECTION OF SINE-SHAPED TONE FREQUENCY SIGNALS WITH A PRE-DETERMINED FREQUENCY

Country Status (4)

Country Link
AT (1) AT370578B (en)
BE (1) BE878073A (en)
ES (1) ES483114A1 (en)
IT (1) IT1117427B (en)

Also Published As

Publication number Publication date
BE878073A (en) 1979-12-03
IT1117427B (en) 1986-02-17
AT370578B (en) 1983-04-11
IT7949912A0 (en) 1979-07-31
ES483114A1 (en) 1980-04-16

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