BE805472A - Recepteur de signaux selectif en frequence - Google Patents

Recepteur de signaux selectif en frequence

Info

Publication number: BE805472A
Authority: BE; Belgium
Prior art keywords: signal receiver; frequency selective; selective signal; frequency; receiver
Prior art date: 1972-09-28

Application number

BE136179A

Other languages

English (en)

Original Assignee

Siemens Ag

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.)

1972-09-28

Filing date

1973-09-28

Publication date

1974-03-28

1972-09-28 Priority claimed from DE19722247575 external-priority patent/DE2247575C3/de

1973-09-28 Application filed by Siemens Ag filed Critical Siemens Ag

1974-03-28 Publication of BE805472A publication Critical patent/BE805472A/fr

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
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Noise Elimination (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Monitoring And Testing Of Transmission In General (AREA)
Telephonic Communication Services (AREA)
Circuits Of Receivers In General (AREA)
Telephone Function (AREA)

BE136179A 1972-09-28 1973-09-28 Recepteur de signaux selectif en frequence BE805472A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19722247575 DE2247575C3 (de)		1972-09-28	Sprachgeschützter frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen

Publications (1)

Publication Number	Publication Date
BE805472A true BE805472A (fr)	1974-03-28

Family

ID=5857625

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE136179A BE805472A (fr)	1972-09-28	1973-09-28	Recepteur de signaux selectif en frequence

Country Status (15)

Country	Link
US (1)	US3932708A (fr)
JP (1)	JPS5340287B2 (fr)
AR (1)	AR198437A1 (fr)
AT (1)	AT330252B (fr)
BE (1)	BE805472A (fr)
BR (1)	BR7307526D0 (fr)
CH (1)	CH566097A5 (fr)
DK (1)	DK141570C (fr)
FR (1)	FR2201599B1 (fr)
GB (1)	GB1440773A (fr)
IT (1)	IT993394B (fr)
LU (1)	LU68509A1 (fr)
NL (1)	NL7313199A (fr)
NO (1)	NO139195C (fr)
SE (1)	SE395213B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH06105948B2 (ja) *	1984-04-09	1994-12-21	株式会社リコー	呼出信号検出装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL267564A (fr) *	1960-08-22
FR1511133A (fr) *	1966-12-16	1968-01-26	Ass Ouvriers Instr Precision	Procédé d'identification de chacune des fréquences d'un groupe de plusieurs fréquences déterminées et appareil récepteur pour la mise en oeuvre de ce procédé
US3537001A (en) *	1968-12-05	1970-10-27	Bell Telephone Labor Inc	Multifrequency tone detector
US3582565A (en) *	1969-01-13	1971-06-01	Automatic Elect Lab	Tone channels for multifrequency receivers
US3582562A (en) *	1969-05-07	1971-06-01	Itt	Key telephone intercommunication system
FR2141502B1 (fr) *	1971-06-01	1973-06-29	Ibm France
US3812432A (en) *	1973-01-05	1974-05-21	Bell Telephone Labor Inc	Tone detector

1973
- 1973-08-09 AT AT699873A patent/AT330252B/de not_active IP Right Cessation
- 1973-08-31 CH CH1243773A patent/CH566097A5/xx not_active IP Right Cessation
- 1973-09-20 US US05/399,337 patent/US3932708A/en not_active Expired - Lifetime
- 1973-09-25 NL NL7313199A patent/NL7313199A/xx not_active Application Discontinuation
- 1973-09-25 IT IT29307/73A patent/IT993394B/it active
- 1973-09-25 AR AR250254A patent/AR198437A1/es active
- 1973-09-26 GB GB4498473A patent/GB1440773A/en not_active Expired
- 1973-09-26 JP JP10833373A patent/JPS5340287B2/ja not_active Expired
- 1973-09-26 LU LU68509A patent/LU68509A1/xx unknown
- 1973-09-26 FR FR7334491A patent/FR2201599B1/fr not_active Expired
- 1973-09-26 NO NO3768/73A patent/NO139195C/no unknown
- 1973-09-27 BR BR7526/73A patent/BR7307526D0/pt unknown
- 1973-09-27 DK DK529173A patent/DK141570C/da not_active IP Right Cessation
- 1973-09-28 BE BE136179A patent/BE805472A/fr not_active IP Right Cessation
- 1973-09-28 SE SE7313263A patent/SE395213B/xx unknown

Also Published As

Publication number	Publication date
US3932708A (en)	1976-01-13
SE395213B (sv)	1977-08-01
NO139195C (no)	1979-01-17
AU5990273A (en)	1975-03-06
BR7307526D0 (pt)	1974-08-29
JPS5340287B2 (fr)	1978-10-26
DE2247575B2 (de)	1975-09-04
FR2201599B1 (fr)	1979-05-11
IT993394B (it)	1975-09-30
FR2201599A1 (fr)	1974-04-26
DK141570C (da)	1980-10-06
JPS4973013A (fr)	1974-07-15
LU68509A1 (fr)	1973-12-07
ATA699873A (de)	1975-09-15
AT330252B (de)	1976-06-25
NO139195B (no)	1978-10-09
AR198437A1 (es)	1974-06-21
CH566097A5 (fr)	1975-08-29
NL7313199A (fr)	1974-04-01
DE2247575A1 (de)	1974-04-18
DK141570B (da)	1980-04-21
GB1440773A (en)	1976-06-23

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Legal Events

Date	Code	Title	Description
1986-03-31	RE	Patent lapsed	Owner name: SIEMENS A.G. Effective date: 19850930

Date

Code

Title

Description

1986-03-31

Patent lapsed

Owner name: SIEMENS A.G.

Effective date: 19850930