SE456130B - Anordning for detektering av flerfrekvenssignaler - Google Patents

Anordning for detektering av flerfrekvenssignaler

Info

Publication number
SE456130B
SE456130B SE8202030A SE8202030A SE456130B SE 456130 B SE456130 B SE 456130B SE 8202030 A SE8202030 A SE 8202030A SE 8202030 A SE8202030 A SE 8202030A SE 456130 B SE456130 B SE 456130B
Authority
SE
Sweden
Prior art keywords
signal
threshold level
frequency
output
signals
Prior art date
Application number
SE8202030A
Other languages
English (en)
Swedish (sv)
Other versions
SE8202030L (sv
Inventor
J Tow
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of SE8202030L publication Critical patent/SE8202030L/
Publication of SE456130B publication Critical patent/SE456130B/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)
  • Manipulation Of Pulses (AREA)
  • Circuits Of Receivers In General (AREA)
SE8202030A 1981-04-15 1982-03-30 Anordning for detektering av flerfrekvenssignaler SE456130B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/254,442 US4385208A (en) 1981-04-15 1981-04-15 Multifrequency receiver

Publications (2)

Publication Number Publication Date
SE8202030L SE8202030L (sv) 1982-10-16
SE456130B true SE456130B (sv) 1988-09-05

Family

ID=22964335

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8202030A SE456130B (sv) 1981-04-15 1982-03-30 Anordning for detektering av flerfrekvenssignaler

Country Status (11)

Country Link
US (1) US4385208A (ja)
JP (1) JPS581366A (ja)
AU (2) AU552325B2 (ja)
BE (1) BE892839A (ja)
CA (1) CA1194939A (ja)
DE (1) DE3213219A1 (ja)
FR (1) FR2504329B1 (ja)
GB (1) GB2096807B (ja)
IT (1) IT1153483B (ja)
NL (1) NL189942C (ja)
SE (1) SE456130B (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385208A (en) * 1981-04-15 1983-05-24 Bell Telephone Laboratories, Incorporated Multifrequency receiver
US4460808A (en) * 1982-08-23 1984-07-17 At&T Bell Laboratories Adaptive signal receiving method and apparatus
US4604755A (en) * 1984-06-01 1986-08-05 International Business Machines Corp. Feed forward dual channel automatic level control for dual tone multi-frequency receivers
DE3629907A1 (de) * 1986-09-03 1988-03-10 Standard Elektrik Lorenz Ag Signalisierungsempfaenger
US4970656A (en) * 1986-11-07 1990-11-13 Alcon Laboratories, Inc. Analog drive for ultrasonic probe with tunable phase angle
US4786168A (en) * 1986-11-24 1988-11-22 The United States Of America As Represented By The United States National Aeronautics And Space Administration Frequency domain laser velocimeter signal processor
US5001649A (en) * 1987-04-06 1991-03-19 Alcon Laboratories, Inc. Linear power control for ultrasonic probe with tuned reactance
US4984253A (en) * 1988-06-03 1991-01-08 Hughes Aircraft Company Apparatus and method for processing simultaneous radio frequency signals
JPH03132291A (ja) * 1989-10-18 1991-06-05 Fujitsu Ltd Ｐｂ信号検出方式
JPH07226779A (ja) * 1994-02-15 1995-08-22 Nec Eng Ltd 周波数検出回路
US6724834B2 (en) * 2002-02-22 2004-04-20 Albert L. Garrett Threshold detector for detecting synchronization signals at correlator output during packet acquisition
DE10350261B4 (de) * 2003-10-28 2006-04-20 Infineon Technologies Ag Verfahren und Vorrichtung zur Anpassung von Schwellwerten in elektronischen Signalverarbeitungseinrichtungen
US9627186B2 (en) * 2014-08-29 2017-04-18 Lam Research Corporation System, method and apparatus for using optical data to monitor RF generator operations

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2517024C3 (de) * 1975-04-17 1978-03-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für einen Signalempfänger zum Sperren von Signalen, deren Pegel schwankt
SE397763B (sv) * 1976-03-09 1977-11-14 Ericsson Telefon Ab L M Mottagaranordning for storningskenslig detektering av atminstone tva tonfrekvenser i en inkommande tonsignal
IT1072242B (it) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica
JPS5391612A (en) * 1977-01-24 1978-08-11 Nec Corp Receiver for multiple frequency signal
US4121121A (en) * 1977-09-13 1978-10-17 Computer Identics Corporation Follower response control circuit
DE2741952B2 (de) * 1977-09-17 1980-06-19 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Pegelregelung
IT1108119B (it) * 1978-10-05 1985-12-02 Cselt Centro Studi Lab Telecom Procedimento e circuito di pilotaggio per dispositivo non lineari a soglia
US4227055A (en) * 1978-12-07 1980-10-07 Bell Telephone Laboratories, Incorporated Multifrequency receiver
US4385208A (en) * 1981-04-15 1983-05-24 Bell Telephone Laboratories, Incorporated Multifrequency receiver

Also Published As

Publication number Publication date
CA1194939A (en) 1985-10-08
DE3213219A1 (de) 1982-11-11
AU552325B2 (en) 1986-05-29
FR2504329A1 (fr) 1982-10-22
GB2096807A (en) 1982-10-20
GB2096807B (en) 1985-01-16
DE3213219C2 (ja) 1991-04-25
AU573081B2 (en) 1988-05-26
NL8201569A (nl) 1982-11-01
IT1153483B (it) 1987-01-14
FR2504329B1 (fr) 1986-04-04
AU5557786A (en) 1986-09-18
BE892839A (fr) 1982-08-02
IT8220713A0 (it) 1982-04-13
SE8202030L (sv) 1982-10-16
NL189942C (nl) 1993-09-01
JPS581366A (ja) 1983-01-06
AU8234682A (en) 1982-10-21
NL189942B (nl) 1993-04-01
US4385208A (en) 1983-05-24

Similar Documents

Publication Publication Date Title
SE456130B (sv) Anordning for detektering av flerfrekvenssignaler
JP3027047B2 (ja) Ｄｔｍｆ信号検出装置及び方法
US4216463A (en) Programmable digital tone detector
EP0218870B1 (en) Automatic gain control in a digital signal processor
US4143325A (en) Constant amplitude interference squelch system
CA1102887A (en) Multifrequency signal receiver
US4227055A (en) Multifrequency receiver
US4314100A (en) Data detection circuit for a TASI system
WO1984000867A1 (en) Adaptive signal receiving method and apparatus
US4082924A (en) Reference signal circuit in a receiver for detecting two frequencies in a multifrequency tone signal
US3701857A (en) Multifrequency signal receiving circuit
JPH10502238A (ja) 改良形トーン検出手段を具えた伝送システム
EP1111880B1 (en) Method and apparatus for detecting dual tone alerting signal in telephone systems
JPS55151851A (en) Signal blocking device
SU777848A1 (ru) Способ и устройство адаптивного приема сигналов двухканальной частотной телеграфии
SU824484A1 (ru) Приемник тонального вызова
SU649163A1 (ru) Устройство дл адаптивной разнесенной демодул ции сигналов частотной телеграфии
SU756660A1 (ru) Устройство для приема информации • с подавлением помех 1
SU1167743A1 (ru) Способ контрол прерываний по полезному многоканальному сигналу в многоканальных лини х св зи и устройство дл его осуществлени
JPH10501954A (ja) トーン検出を改善した伝送システム
FR2388446A1 (fr) Circuit de detection de l'etat d'une ligne de transmission
SU1169200A1 (ru) Устройство блокировкисигналов с меняющимся уровнем для приемника тональных сигналов
JPS61255132A (ja) 変復調装置の受信復調回路
JPS58162145A (ja) 干渉波検出方式
JPS5752289A (en) Multifrequency signal receiver

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 8202030-6

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 8202030-6

Format of ref document f/p: F