CH504145A - Mehrfrequenz-Signalisierungsempfänger - Google Patents

Mehrfrequenz-Signalisierungsempfänger

Info

Publication number
CH504145A
CH504145A CH734369A CH734369A CH504145A CH 504145 A CH504145 A CH 504145A CH 734369 A CH734369 A CH 734369A CH 734369 A CH734369 A CH 734369A CH 504145 A CH504145 A CH 504145A
Authority
CH
Switzerland
Prior art keywords
frequency signaling
signaling receiver
receiver
frequency
signaling
Prior art date
Application number
CH734369A
Other languages
English (en)
Inventor
Sellari Daniele Jr
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH504145A publication Critical patent/CH504145A/de

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
CH734369A 1968-05-14 1969-05-14 Mehrfrequenz-Signalisierungsempfänger CH504145A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72895868A 1968-05-14 1968-05-14

Publications (1)

Publication Number Publication Date
CH504145A true CH504145A (de) 1971-02-28

Family

ID=24928961

Family Applications (1)

Application Number Title Priority Date Filing Date
CH734369A CH504145A (de) 1968-05-14 1969-05-14 Mehrfrequenz-Signalisierungsempfänger

Country Status (5)

Country Link
US (1) US3576403A (de)
BE (1) BE733014A (de)
CH (1) CH504145A (de)
FR (1) FR2008503B1 (de)
NL (1) NL6907489A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153819A (en) * 1977-12-19 1979-05-08 Northern Telecom Limited Telephone tone signalling receiver with up-conversion of frequency of tones controlled by word instructions

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653194A (en) * 1949-05-27 1953-09-22 Rca Corp Selective circuit
US2767248A (en) * 1952-06-27 1956-10-16 Siemens Brothers & Co Ltd Electrically operated registers
NL267564A (de) * 1960-08-22
US3409742A (en) * 1965-02-11 1968-11-05 Bell Telephone Labor Inc Data converting buffer circuit
US3441682A (en) * 1965-05-28 1969-04-29 Bell Telephone Labor Inc Multifrequency signal receiver with compensation for power source variations

Also Published As

Publication number Publication date
US3576403A (en) 1971-04-27
FR2008503A1 (de) 1970-01-23
FR2008503B1 (de) 1976-10-01
BE733014A (de) 1969-11-14
NL6907489A (de) 1969-11-18

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Legal Events

Date Code Title Description
PL Patent ceased