FI944857A - A method for detecting a signal of a predetermined frequency and a detector circuit - Google Patents

A method for detecting a signal of a predetermined frequency and a detector circuit Download PDF

Info

Publication number
FI944857A
FI944857A FI944857A FI944857A FI944857A FI 944857 A FI944857 A FI 944857A FI 944857 A FI944857 A FI 944857A FI 944857 A FI944857 A FI 944857A FI 944857 A FI944857 A FI 944857A
Authority
FI
Finland
Prior art keywords
detecting
signal
predetermined frequency
detector circuit
detector
Prior art date
Application number
FI944857A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI99166B (en
FI944857A0 (en
FI99166C (en
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/en
Publication of FI944857A0 publication Critical patent/FI944857A0/en
Priority to EP95934161A priority patent/EP0786093A1/en
Priority to CN 95196167 priority patent/CN1082666C/en
Priority to AU36557/95A priority patent/AU3655795A/en
Priority to PCT/FI1995/000563 priority patent/WO1996012196A1/en
Publication of FI944857A publication Critical patent/FI944857A/en
Publication of FI99166B publication Critical patent/FI99166B/en
Application granted granted Critical
Publication of FI99166C publication Critical patent/FI99166C/en

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
FI944857A 1994-10-14 1994-10-14 A method for detecting a signal having a predetermined frequency and a detection circuit FI99166C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI944857A FI99166C (en) 1994-10-14 1994-10-14 A method for detecting a signal having a predetermined frequency and a detection circuit
EP95934161A EP0786093A1 (en) 1994-10-14 1995-10-11 Method for detecting a signal
CN 95196167 CN1082666C (en) 1994-10-14 1995-10-11 Method for detecting a signal
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 (en) 1994-10-14 1994-10-14 A method for detecting a signal having a predetermined frequency and a detection circuit

Publications (4)

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

Family

ID=8541595

Family Applications (1)

Application Number Title Priority Date Filing Date
FI944857A FI99166C (en) 1994-10-14 1994-10-14 A method for detecting a signal having a predetermined frequency and a detection circuit

Country Status (5)

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

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 (en) * 1984-05-04 1986-10-01 Ates Componenti Elettron Monolithically integratable telephone circuit for generating control signals for displaying telephone charges
DE3832145A1 (en) * 1988-09-22 1990-03-29 Philips Patentverwaltung METHOD AND CIRCUIT FOR MEASURING SMALL ELECTRICAL SIGNALS
FR2648661B1 (en) * 1989-06-19 1994-03-04 Alcatel Business Systems LOW FREQUENCY ALTERNATIVE SIGNAL DETECTOR IN PARTICULAR FOR TELEPHONE TRUNK

Also Published As

Publication number Publication date
CN1162996A (en) 1997-10-22
CN1082666C (en) 2002-04-10
FI99166B (en) 1997-06-30
WO1996012196A1 (en) 1996-04-25
FI944857A0 (en) 1994-10-14
AU3655795A (en) 1996-05-06
FI99166C (en) 1997-10-10
EP0786093A1 (en) 1997-07-30

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