IT1097368B - Ricevitore di segnali multifrequenza - Google Patents

Ricevitore di segnali multifrequenza

Info

Publication number: IT1097368B
Authority: IT; Italy
Prior art keywords: signal receiver; multifrequency signal; multifrequency; receiver; signal
Prior art date: 1977-07-26

Application number

IT26073/78A

Other languages

English (en)

Other versions

IT7826073A0 (it

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.)

1977-07-26

Filing date

1978-07-25

Publication date

1985-08-31

1978-07-25 Application filed by Western Electric Co filed Critical Western Electric Co

1978-07-25 Publication of IT7826073A0 publication Critical patent/IT7826073A0/it

1985-08-31 Application granted granted Critical

1985-08-31 Publication of IT1097368B publication Critical patent/IT1097368B/it

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)
Circuits Of Receivers In General (AREA)

IT26073/78A 1977-07-26 1978-07-25 Ricevitore di segnali multifrequenza IT1097368B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/819,112 US4091243A (en)	1977-07-26	1977-07-26	Multifrequency signal receiver

Publications (2)

Publication Number	Publication Date
IT7826073A0 IT7826073A0 (it)	1978-07-25
IT1097368B true IT1097368B (it)	1985-08-31

Family

ID=25227234

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT26073/78A IT1097368B (it)	1977-07-26	1978-07-25	Ricevitore di segnali multifrequenza

Country Status (13)

Country	Link
US (1)	US4091243A (it)
JP (1)	JPS5424509A (it)
AU (1)	AU3819478A (it)
BE (1)	BE869241A (it)
CA (1)	CA1102887A (it)
ES (1)	ES472043A1 (it)
FR (1)	FR2399175A1 (it)
GB (1)	GB2021354A (it)
IL (1)	IL55197A (it)
IT (1)	IT1097368B (it)
NL (1)	NL7807863A (it)
SE (1)	SE7902501L (it)
WO (1)	WO1979000066A1 (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4227055A (en) *	1978-12-07	1980-10-07	Bell Telephone Laboratories, Incorporated	Multifrequency receiver
US4386239A (en) *	1980-06-17	1983-05-31	Bell Telephone Laboratories, Incorporated	Multifrequency tone detector
ZA82379B (en) *	1981-01-28	1982-12-29	Grace Gmbh	Process for producing porous materials and the use thereof
US4398147A (en) *	1981-04-15	1983-08-09	Western Electric Company, Inc.	Methods of testing multifrequency dialing signals
US4463851A (en) *	1982-04-26	1984-08-07	Meritex Plastic Inc.	Protective enclosure for electronic devices
US4608457A (en) *	1984-04-11	1986-08-26	Fowler Stephen L	Telecommunications device for the hearing impared
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
US4709297A (en) *	1984-06-29	1987-11-24	Siemens Aktiengesellschaft	Guiding device for semiconductor components with DIL casings
CA1239719A (en) *	1985-11-22	1988-07-26	Mitel Corporation	Dial tone detector
US5588052A (en) *	1991-11-19	1996-12-24	Sharp Kabushiki Kaisha	DTMF signal judging apparatus
EP0548438A1 (en) *	1991-12-20	1993-06-30	International Business Machines Corporation	A method for detecting dual tone multi-frequency signals and device for implementing said method
US5321745A (en) *	1992-05-26	1994-06-14	Vmx, Inc.	Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals
US5699421A (en) *	1995-05-31	1997-12-16	Casio Phonemate, Inc.	Telephone answering device with low cost dual tone multi-frequency detector
US5802112A (en) *	1996-01-16	1998-09-01	Transcendat Inc.	Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission
US6038262A (en) *	1998-06-09	2000-03-14	Transcendata, Inc.	Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission
GB2357216B (en) *	1999-12-11	2004-05-12	Mitel Corp	Method and apparatus for detecting dual tone alerting signal in telephone systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1512006A1 (de) *	1966-12-03	1969-02-20	Standard Elek K Lorenz Ag	Empfangseinrichtung fuer tonfrequente Zeichen
US3836727A (en) *	1972-01-27	1974-09-17	Philips Corp	Signal receiver for receiving signals of different frequency
US3914557A (en) *	1973-04-11	1975-10-21	Bell Telephone Labor Inc	Multifrequency tone detecting arrangement
NL7312548A (nl) *	1973-09-12	1975-03-14	Bell Telephone Mfg	Multifrequent signaleringsstelsel.
US3875347A (en) *	1973-10-01	1975-04-01	Gte Automatic Electric Lab Inc	Multifrequency signal receiver
US3936801A (en) *	1974-09-12	1976-02-03	Bell Telephone Laboratories, Incorporated	Multifrequency signal receiver timing circuit
US4016370A (en) *	1975-03-19	1977-04-05	Chestel, Inc.	Digital tone decoder

1977
- 1977-07-26 US US05/819,112 patent/US4091243A/en not_active Expired - Lifetime
1978
- 1978-06-29 CA CA306,495A patent/CA1102887A/en not_active Expired
- 1978-07-20 WO PCT/US1978/000044 patent/WO1979000066A1/en unknown
- 1978-07-20 GB GB7906993A patent/GB2021354A/en not_active Withdrawn
- 1978-07-20 AU AU38194/78A patent/AU3819478A/en active Pending
- 1978-07-21 IL IL55197A patent/IL55197A/xx unknown
- 1978-07-24 NL NL7807863A patent/NL7807863A/xx not_active Application Discontinuation
- 1978-07-25 BE BE189477A patent/BE869241A/xx unknown
- 1978-07-25 JP JP9006978A patent/JPS5424509A/ja active Pending
- 1978-07-25 IT IT26073/78A patent/IT1097368B/it active
- 1978-07-26 ES ES472043A patent/ES472043A1/es not_active Expired
- 1978-07-26 FR FR7822120A patent/FR2399175A1/fr active Pending
1979
- 1979-03-20 SE SE7902501A patent/SE7902501L/sv unknown

Also Published As

Publication number	Publication date
IL55197A0 (en)	1978-09-29
WO1979000066A1 (en)	1979-02-22
JPS5424509A (en)	1979-02-23
FR2399175A1 (fr)	1979-02-23
CA1102887A (en)	1981-06-09
US4091243A (en)	1978-05-23
BE869241A (fr)	1978-11-16
GB2021354A (en)	1979-11-28
NL7807863A (nl)	1979-01-30
SE7902501L (it)	1979-03-20
IL55197A (en)	1980-05-30
IT7826073A0 (it)	1978-07-25
AU3819478A (en)	1980-01-24
ES472043A1 (es)	1979-02-01

Publication	Publication Date	Title
SE7804451L (sv)	1978-10-28	Signalbehandlingsanordning
IT1100245B (it)	1985-09-28	Ricevitore di segnali numerici multifrequenze codificati
SE7810417L (sv)	1979-04-06	Kapacitiv metverdesupptagare
NO146114C (no)	1982-08-11	Dupleks-sende/mottagningsinnretning
IT1099331B (it)	1985-09-18	Complesso ricevitore per televisione
IT1097368B (it)	1985-08-31	Ricevitore di segnali multifrequenza
SE7807736L (sv)	1979-01-26	Signalbehandlande anordning
AT377135B (de)	1985-02-11	Empfaenger
IT1098913B (it)	1985-09-18	Ricevitore per segnali stereo am compatibili
GB2006493B (en)	1982-04-15	Multifrequency signal receiving system
NL187883C (nl)	1992-02-03	Am-ontvanger.
NL7802396A (nl)	1978-09-05	Ontvanger.
FI783494A (fi)	1979-05-19	Oevervakningsanordning foer gaongvaeg ansluten till en tidsmultiplexkopplad kopplingskrets foer en kodad signal
SE7800213L (sv)	1978-07-15	Telefonapparat
NL7809423A (nl)	1979-03-20	Ontvangercircuit.
NL183116C (nl)	1988-07-18	Multifrequentiesignaal-ontvanginrichting.
SE7803252L (sv)	1978-09-24	Talskyddad frekvensselektiv signalmottagare
IT1037582B (it)	1979-11-20	Ricevitore di segnali multifrequenze
AT352802B (de)	1979-10-10	Fernsehsignalkennschaltung
NL188491C (nl)	1992-07-01	Signaalontvangstinrichting.
SE7713605L (sv)	1979-06-02	Signalindikeringsanordning
SE7707799L (sv)	1979-01-06	Telefonapparat
PL201664A1 (pl)	1979-06-18	Automatyczny odbiornik sygnalow alarmowych
GB1542836A (en)	1979-03-28	Multifrequency signal receiver
PL202618A1 (pl)	1979-07-16	Dwuprzewodowy separator sygnalow pradowych