FI99166B - Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri - Google Patents

Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri

Info

Publication number
FI99166B
FI99166B FI944857A FI944857A FI99166B FI 99166 B FI99166 B FI 99166B FI 944857 A FI944857 A FI 944857A FI 944857 A FI944857 A FI 944857A FI 99166 B FI99166 B FI 99166B
Authority
FI
Finland
Prior art keywords
detecting
signal
detection circuit
predetermined frequency
frequency
Prior art date
Application number
FI944857A
Other languages
English (en)
Swedish (sv)
Other versions
FI944857A (fi
FI944857A0 (fi
FI99166C (fi
Inventor
Harri Hurme
Caj Nordstroem
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to FI944857A priority Critical patent/FI99166C/fi
Publication of FI944857A0 publication Critical patent/FI944857A0/fi
Priority to EP95934161A priority patent/EP0786093A1/en
Priority to CN 95196167 priority patent/CN1082666C/zh
Priority to AU36557/95A priority patent/AU3655795A/en
Priority to PCT/FI1995/000563 priority patent/WO1996012196A1/en
Publication of FI944857A publication Critical patent/FI944857A/fi
Application granted granted Critical
Publication of FI99166B publication Critical patent/FI99166B/fi
Publication of FI99166C publication Critical patent/FI99166C/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0007—Frequency selective voltage or current level measuring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • 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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Meter Arrangements (AREA)
  • Interface Circuits In Exchanges (AREA)
FI944857A 1994-10-14 1994-10-14 Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri FI99166C (fi)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI944857A FI99166C (fi) 1994-10-14 1994-10-14 Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri
EP95934161A EP0786093A1 (en) 1994-10-14 1995-10-11 Method for detecting a signal
CN 95196167 CN1082666C (zh) 1994-10-14 1995-10-11 一种检测预定频率的交流信号的方法及检测器电路
AU36557/95A AU3655795A (en) 1994-10-14 1995-10-11 Method for detecting a signal
PCT/FI1995/000563 WO1996012196A1 (en) 1994-10-14 1995-10-11 Method for detecting a signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI944857 1994-10-14
FI944857A FI99166C (fi) 1994-10-14 1994-10-14 Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri

Publications (4)

Publication Number Publication Date
FI944857A0 FI944857A0 (fi) 1994-10-14
FI944857A FI944857A (fi) 1996-04-15
FI99166B true FI99166B (fi) 1997-06-30
FI99166C FI99166C (fi) 1997-10-10

Family

ID=8541595

Family Applications (1)

Application Number Title Priority Date Filing Date
FI944857A FI99166C (fi) 1994-10-14 1994-10-14 Menetelmä ennalta määrätyn taajuisen signaalin detektoimiseksi sekä ilmaisinpiiri

Country Status (5)

Country Link
EP (1) EP0786093A1 (fi)
CN (1) CN1082666C (fi)
AU (1) AU3655795A (fi)
FI (1) FI99166C (fi)
WO (1) WO1996012196A1 (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9634703B2 (en) * 2015-07-29 2017-04-25 Raytheon Company Low power encoded signal detection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8700528A1 (es) * 1984-05-04 1986-10-01 Ates Componenti Elettron Perfeccionamientos en los circuitos telefonicos integrables monoliticamente.
DE3832145A1 (de) * 1988-09-22 1990-03-29 Philips Patentverwaltung Verfahren und schaltungsanordnung zur messung kleiner elektrischer signale
FR2648661B1 (fr) * 1989-06-19 1994-03-04 Alcatel Business Systems Detecteur de signaux alternatifs basse frequence notamment pour joncteur telephonique

Also Published As

Publication number Publication date
WO1996012196A1 (en) 1996-04-25
FI944857A (fi) 1996-04-15
FI944857A0 (fi) 1994-10-14
CN1162996A (zh) 1997-10-22
FI99166C (fi) 1997-10-10
AU3655795A (en) 1996-05-06
EP0786093A1 (en) 1997-07-30
CN1082666C (zh) 2002-04-10

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Legal Events

Date Code Title Description
BB Publication of examined application