PL204503A1 - CONNECTION SYSTEM FOR PERIODIC DETECTION OF ELECTRIC SIGNALS IN A SPECIFIED FREQUENCY BAND - Google Patents

CONNECTION SYSTEM FOR PERIODIC DETECTION OF ELECTRIC SIGNALS IN A SPECIFIED FREQUENCY BAND

Info

Publication number
PL204503A1
PL204503A1 PL20450378A PL20450378A PL204503A1 PL 204503 A1 PL204503 A1 PL 204503A1 PL 20450378 A PL20450378 A PL 20450378A PL 20450378 A PL20450378 A PL 20450378A PL 204503 A1 PL204503 A1 PL 204503A1
Authority
PL
Poland
Prior art keywords
frequency band
electric signals
connection system
specified frequency
periodic detection
Prior art date
Application number
PL20450378A
Other languages
Polish (pl)
Other versions
PL125729B1 (en
Original Assignee
Budapesti Radiotechnikai Gyar
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 Budapesti Radiotechnikai Gyar filed Critical Budapesti Radiotechnikai Gyar
Publication of PL204503A1 publication Critical patent/PL204503A1/en
Publication of PL125729B1 publication Critical patent/PL125729B1/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
    • 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)
  • Manipulation Of Pulses (AREA)
PL20450378A 1977-02-09 1978-02-07 System of circuits for detection of periodic electric signals in specific frequency band PL125729B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU77BU837A HU173814B (en) 1977-02-09 1977-02-09 Circuit array for sensing electric signals of prescribed band of freqency

Publications (2)

Publication Number Publication Date
PL204503A1 true PL204503A1 (en) 1979-01-02
PL125729B1 PL125729B1 (en) 1983-06-30

Family

ID=10994023

Family Applications (1)

Application Number Title Priority Date Filing Date
PL20450378A PL125729B1 (en) 1977-02-09 1978-02-07 System of circuits for detection of periodic electric signals in specific frequency band

Country Status (4)

Country Link
DD (1) DD134176A5 (en)
HU (1) HU173814B (en)
NL (1) NL7801053A (en)
PL (1) PL125729B1 (en)

Also Published As

Publication number Publication date
NL7801053A (en) 1978-08-11
PL125729B1 (en) 1983-06-30
DD134176A5 (en) 1979-02-07
HU173814B (en) 1979-08-28

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