SE7908195L - Signalmottagningsanordning for flera frekvenser - Google Patents

Signalmottagningsanordning for flera frekvenser

Info

Publication number
SE7908195L
SE7908195L SE7908195A SE7908195A SE7908195L SE 7908195 L SE7908195 L SE 7908195L SE 7908195 A SE7908195 A SE 7908195A SE 7908195 A SE7908195 A SE 7908195A SE 7908195 L SE7908195 L SE 7908195L
Authority
SE
Sweden
Prior art keywords
maximum value
signals
channel filters
detecting
frequency signal
Prior art date
Application number
SE7908195A
Other languages
Unknown language ( )
English (en)
Other versions
SE437910B (sv
Inventor
Kazuhiko Takaoka
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of SE7908195L publication Critical patent/SE7908195L/sv
Publication of SE437910B publication Critical patent/SE437910B/sv

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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
SE7908195A 1978-10-04 1979-10-03 Flerfrekvenssignalmottagningsanordning SE437910B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53121543A JPS5830793B2 (ja) 1978-10-04 1978-10-04 多周波信号受信方式

Publications (2)

Publication Number Publication Date
SE7908195L true SE7908195L (sv) 1980-04-05
SE437910B SE437910B (sv) 1985-03-18

Family

ID=14813841

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7908195A SE437910B (sv) 1978-10-04 1979-10-03 Flerfrekvenssignalmottagningsanordning

Country Status (5)

Country Link
US (1) US4286221A (sv)
JP (1) JPS5830793B2 (sv)
CA (1) CA1128614A (sv)
NL (1) NL183116C (sv)
SE (1) SE437910B (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33381E (en) * 1981-08-31 1990-10-09 Multiple system AM stereo receiver and pilot signal detector
US4426728A (en) 1981-08-31 1984-01-17 Kahn Leonard R Multiple system AM stereo receiver and pilot signal detector
SE430554B (sv) * 1982-04-06 1983-11-21 Ericsson Telefon Ab L M Anordning for att identifiera digitala flerfrekvenssignaler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555435A (en) * 1968-11-21 1971-01-12 Robert E Vosteen Multifrequency signal detector
CH522327A (de) * 1970-09-28 1972-06-15 Bbc Brown Boveri & Cie Elektrische Filterschaltung
US3805171A (en) * 1972-07-12 1974-04-16 Eastech Signal frequency detection circuit
US3812432A (en) * 1973-01-05 1974-05-21 Bell Telephone Labor Inc Tone detector
US4017742A (en) * 1975-03-28 1977-04-12 The Bendix Corporation Multiple input, multiple failure operational voter circuit

Also Published As

Publication number Publication date
CA1128614A (en) 1982-07-27
JPS5830793B2 (ja) 1983-07-01
US4286221A (en) 1981-08-25
NL183116C (nl) 1988-07-18
NL7907335A (nl) 1980-04-09
SE437910B (sv) 1985-03-18
JPS5549093A (en) 1980-04-08

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