SE397461B - FREQUENCY SELECTIVE SIGNAL RECEIVER FOR TELECOMMUNICATIONS - Google Patents

FREQUENCY SELECTIVE SIGNAL RECEIVER FOR TELECOMMUNICATIONS

Info

Publication number: SE397461B
Authority: SE; Sweden
Prior art keywords: telecommunications; signal receiver; frequency selective; selective signal; frequency
Prior art date: 1971-09-14

Application number

SE1182472A

Other languages

Swedish (sv)

Inventor

D Hammerl

K-D Rother

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.)

1971-09-14

Filing date

1972-09-13

Publication date

1977-10-31

1971-09-14 Priority claimed from DE19712145886 external-priority patent/DE2145886C2/en

1971-11-11 Priority claimed from DE19712156123 external-priority patent/DE2156123C2/en

1972-09-13 Application filed by Siemens Ag filed Critical Siemens Ag

1977-10-31 Publication of SE397461B publication Critical patent/SE397461B/en

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
- H04Q1/457—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)
Monitoring And Testing Of Exchanges (AREA)
Interface Circuits In Exchanges (AREA)
Mobile Radio Communication Systems (AREA)

SE1182472A 1971-09-14 1972-09-13 FREQUENCY SELECTIVE SIGNAL RECEIVER FOR TELECOMMUNICATIONS SE397461B (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19712145886 DE2145886C2 (en)	1971-09-14	1971-09-14	Voice-protected, frequency-selective signal receiver for telecommunications, in particular telephone systems
DE19712156123 DE2156123C2 (en)	1971-11-11	1971-11-11	Frequency-selective character receiver for telecommunications, in particular telephone systems

Publications (1)

Publication Number	Publication Date
SE397461B true SE397461B (en)	1977-10-31

Family

ID=25761724

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE1182472A SE397461B (en)	1971-09-14	1972-09-13	FREQUENCY SELECTIVE SIGNAL RECEIVER FOR TELECOMMUNICATIONS

Country Status (9)

Country	Link
AT (1)	AT328516B (en)
BE (1)	BE788813A (en)
CH (1)	CH545569A (en)
FR (1)	FR2153943A5 (en)
GB (1)	GB1402119A (en)
IT (1)	IT967367B (en)
LU (1)	LU66057A1 (en)
NL (1)	NL7212486A (en)
SE (1)	SE397461B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4216463A (en) *	1978-08-10	1980-08-05	Motorola, Inc.	Programmable digital tone detector

0
- BE BE788813D patent/BE788813A/en unknown
1972
- 1972-08-17 AT AT713372A patent/AT328516B/en not_active IP Right Cessation
- 1972-08-21 CH CH545569D patent/CH545569A/xx not_active IP Right Cessation
- 1972-09-11 FR FR7232114A patent/FR2153943A5/fr not_active Expired
- 1972-09-12 IT IT2907772A patent/IT967367B/en active
- 1972-09-12 LU LU66057D patent/LU66057A1/xx unknown
- 1972-09-13 SE SE1182472A patent/SE397461B/en unknown
- 1972-09-13 GB GB4245972A patent/GB1402119A/en not_active Expired
- 1972-09-14 NL NL7212486A patent/NL7212486A/xx not_active Application Discontinuation

Also Published As

Publication number	Publication date
LU66057A1 (en)	1973-01-17
CH545569A (en)	1974-01-31
NL7212486A (en)	1973-03-16
IT967367B (en)	1974-02-28
GB1402119A (en)	1975-08-06
BE788813A (en)	1973-03-14
ATA713372A (en)	1975-06-15
FR2153943A5 (en)	1973-05-04
AT328516B (en)	1976-03-25

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