GB1595238A - Tone signal detector - Google Patents

Tone signal detector Download PDF

Info

Publication number
GB1595238A
GB1595238A GB47471/77A GB4747177A GB1595238A GB 1595238 A GB1595238 A GB 1595238A GB 47471/77 A GB47471/77 A GB 47471/77A GB 4747177 A GB4747177 A GB 4747177A GB 1595238 A GB1595238 A GB 1595238A
Authority
GB
United Kingdom
Prior art keywords
signals
counter
tone
frequency
gate
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB47471/77A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of GB1595238A publication Critical patent/GB1595238A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices
    • H04W88/188—Selective call encoders for paging networks, e.g. paging centre devices using frequency address codes
    • 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)
  • Signal Processing (AREA)
  • Electromechanical Clocks (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
GB47471/77A 1976-11-26 1977-11-15 Tone signal detector Expired GB1595238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14186076A JPS5366309A (en) 1976-11-26 1976-11-26 Digital type tone signal detector

Publications (1)

Publication Number Publication Date
GB1595238A true GB1595238A (en) 1981-08-12

Family

ID=15301839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47471/77A Expired GB1595238A (en) 1976-11-26 1977-11-15 Tone signal detector

Country Status (4)

Country Link
US (1) US4231018A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5366309A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1099345A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1595238A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297670A (en) * 1994-12-30 1996-08-07 Mitel Corp Ring discriminator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438405A (en) 1980-08-12 1984-03-20 Nippon Gijutsu Boeki Co., Ltd. Frequency discriminating device
JPS5847398A (ja) * 1981-09-17 1983-03-19 Hitachi Ltd リモコン信号再生回路
JPS58168395A (ja) * 1982-03-29 1983-10-04 Nec Corp 多周波信号検出回路
US4646258A (en) * 1982-12-30 1987-02-24 Memorial Hospital For Cancer And Allied Diseases Sampled N-path filter
US5295178A (en) * 1990-12-03 1994-03-15 Ericsson Ge Mobile Communications Inc. Digital signal processor for radio base station
US5583785A (en) * 1993-12-28 1996-12-10 Talkie Tooter, Inc. Method and apparatus for signal decoder using instantaneous magnitude and phase detection
US5574360A (en) * 1995-05-12 1996-11-12 Northrop Grumman Corporation Simultaneous signal detector

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670242A (en) * 1969-12-03 1972-06-13 Lear Siegler Inc A selective paging receiver and decoder employing an electronic filter means
CH540608A (de) * 1971-07-01 1973-08-15 Zellweger Uster Ag Verfahren und Vorrichtung zur Fernübertragung eines Signales
US3803429A (en) * 1972-11-07 1974-04-09 Motorola Inc Switchable frequency tone filter and detector with high speed switching capability
DE2341224C3 (de) * 1973-08-16 1982-01-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Verfahren zur Frequenzerkennung in selektiven Zeichenempfängern für Fernmelde-, insbesondere Fernsprechanlagen
US3882466A (en) * 1973-10-12 1975-05-06 Motorola Inc Switchable frequency tone detector with electronically controlled code plug and bcd converter
GB1525570A (en) * 1974-11-21 1978-09-20 Lucas Industries Ltd Apparatus for generating a digital count proportional to an input frequency
US4016371A (en) * 1976-01-26 1977-04-05 Rockwell International Corporation Frequency tone detection
US4029274A (en) * 1976-04-12 1977-06-14 General Signal Corporation Train control signalling system
GB1562121A (en) * 1976-11-26 1980-03-05 Nippon Electric Co Tone signal detecting circuits

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297670A (en) * 1994-12-30 1996-08-07 Mitel Corp Ring discriminator
US5610978A (en) * 1994-12-30 1997-03-11 Mitel Corporation Ring discriminator
GB2297670B (en) * 1994-12-30 1999-12-08 Mitel Corp Ring discriminator

Also Published As

Publication number Publication date
JPS5366309A (en) 1978-06-13
US4231018A (en) 1980-10-28
JPS6142903B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1986-09-24
CA1099345A (en) 1981-04-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921115