ZA784095B - Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems - Google Patents

Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems

Info

Publication number
ZA784095B
ZA784095B ZA00784095A ZA784095A ZA784095B ZA 784095 B ZA784095 B ZA 784095B ZA 00784095 A ZA00784095 A ZA 00784095A ZA 784095 A ZA784095 A ZA 784095A ZA 784095 B ZA784095 B ZA 784095B
Authority
ZA
South Africa
Prior art keywords
conference
relating
connections
vice versa
signals
Prior art date
Application number
ZA00784095A
Other languages
English (en)
Inventor
P Hirschmann
E Hoefer
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.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of ZA784095B publication Critical patent/ZA784095B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Interface Circuits In Exchanges (AREA)
ZA00784095A 1977-07-22 1978-07-18 Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems ZA784095B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2733227A DE2733227C2 (de) 1977-07-22 1977-07-22 Anordnung zur Umsetzung von Analog-Signalen in Digital-Signale und umgekehrt von Digital-Signalen in Analog-Signale

Publications (1)

Publication Number Publication Date
ZA784095B true ZA784095B (en) 1979-07-25

Family

ID=6014637

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00784095A ZA784095B (en) 1977-07-22 1978-07-18 Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems

Country Status (11)

Country Link
US (1) US4162376A (de)
JP (1) JPS5917568B2 (de)
AT (1) AT374991B (de)
BE (1) BE869179R (de)
CH (1) CH632366A5 (de)
DE (1) DE2733227C2 (de)
GB (1) GB2004713B (de)
IT (1) IT1108978B (de)
NL (1) NL7807122A (de)
SE (1) SE426126B (de)
ZA (1) ZA784095B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4325139A (en) * 1980-08-28 1982-04-13 Bell Telephone Laboratories, Incorporated Circuit for combining delta modulated signals
US4479212A (en) * 1982-03-12 1984-10-23 At&T Bell Laboratories Conference circuit
GB2134751B (en) * 1983-01-18 1986-07-30 Plessey Co Plc Conference bridge
GB2183965A (en) * 1985-12-10 1987-06-10 Weng Pu San Circuit structure of teleconference
US5231629A (en) * 1990-10-01 1993-07-27 Motorola, Inc. Full-duplex communication system
US5929796A (en) * 1997-04-29 1999-07-27 National Semiconductor Corporation Self-calibrating reversible pipeline analog to digital and digital to analog converter
US8073395B2 (en) * 2006-03-07 2011-12-06 Samsung Electronics Co., Ltd. Channel sensing based on self-signal suppression

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540037A (en) * 1967-07-20 1970-11-10 Ibm Time shared bipolar analog-to-digital and digital - to - analog conversion apparatus
US3551600A (en) * 1968-02-23 1970-12-29 Stromberg Carlson Corp High capacity,high side-tone suppression,4-wire conference circuit
US3889063A (en) * 1971-08-19 1975-06-10 Phonplex Corp Multiplexed digital data communication system
US3828146A (en) * 1973-03-22 1974-08-06 Bell Telephone Labor Inc Time division conference hybrid circuit
DE2445092B1 (de) * 1974-09-20 1976-01-22 Siemens Ag Verfahren zum verbinden wenigstens dreier teilnehmer einer zeitmultiplex- fernmelde-, insbesondere pcm-fernsprechvermittlungsanlage
US3971891A (en) * 1975-03-14 1976-07-27 Martin Marietta Corporation Adaptable time division switch
DE2534109B2 (de) * 1975-07-30 1979-03-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Schaltungsanordnung zur Umsetzung von Analog-Signalen in Dighal-Signale und von Digital-Signalen in Analog-Signale

Also Published As

Publication number Publication date
DE2733227A1 (de) 1979-02-01
NL7807122A (nl) 1979-01-24
JPS5423368A (en) 1979-02-21
JPS5917568B2 (ja) 1984-04-21
AT374991B (de) 1984-06-25
SE7808051L (sv) 1979-03-20
SE426126B (sv) 1982-12-06
ATA461278A (de) 1983-10-15
IT7825757A0 (it) 1978-07-17
BE869179R (fr) 1979-01-22
GB2004713A (en) 1979-04-04
GB2004713B (en) 1982-05-12
DE2733227C2 (de) 1986-12-04
CH632366A5 (de) 1982-09-30
US4162376A (en) 1979-07-24
IT1108978B (it) 1985-12-16

Similar Documents

Publication Publication Date Title
PT68748A (en) Improvements in or relating to the switching of digital signals
JPS5491160A (en) Digital circuit
ZA772342B (en) Improvements in or relating to digital telecommunication switching systems
GB2060293B (en) Analogue to digital converter system with an output stabilizing circuit
HK21180A (en) Improvements in or relating to digital to analogue converter arrangements
GB2079080B (en) Analogue to digital converter
JPS5346260A (en) Circuit for converting analog to digital and vice versa
ZA784095B (en) Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems
JPS5244109A (en) Circuit for converting digital to analog signals and vice versa
JPS5422152A (en) Circuit for converting analog signal to digital signal and vice versa
JPS55162615A (en) Attenuator signal controllable using digital to analog converter
GB2014384B (en) Digital to analogue converter circuit
AT363998B (de) Schaltungsanordnung fuer fernmeldeanlagen zur umsetzung von analog-signalen in digital-signale und von digital-signalen in analog-signale
GB8530669D0 (en) Converting analogue input signal to digital form
CH613320A5 (en) Method and circuit arrangement for converting analog signals into digital signals and digital signals into analog signals in telecommunications systems
ZA76173B (en) Improvements in or relating to digital signal sampling circuits
GB2005961A (en) Digital signal switching system
GB1553091A (en) Asynchronous analogue to digital and digital to analogue signal conversion circuit
GB2003684B (en) Electronic tuning type receiver with digital to analog converter
DE3071855D1 (en) Analog to digital converter circuit
JPS5417063A (en) Electronic digital scale
GB8503503D0 (en) Converting analogue input signal to digital form
EG13400A (en) Improvements in or relating to digital telecommunication switching systems
GB1552796A (en) Digital to analogue converter arrangements
GB8625030D0 (en) Converting analogue input signal to digital form