GB1155805A - Improvements in or relating to Time Division Multiplex Circuits - Google Patents

Improvements in or relating to Time Division Multiplex Circuits

Info

Publication number
GB1155805A
GB1155805A GB1104868A GB1104868A GB1155805A GB 1155805 A GB1155805 A GB 1155805A GB 1104868 A GB1104868 A GB 1104868A GB 1104868 A GB1104868 A GB 1104868A GB 1155805 A GB1155805 A GB 1155805A
Authority
GB
United Kingdom
Prior art keywords
transistors
successive
transistor
time division
division multiplex
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1104868A
Inventor
Andrew Lumsdaine Karney
Roy Charles Thorncroft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1104868A priority Critical patent/GB1155805A/en
Priority to CH351969A priority patent/CH497102A/en
Publication of GB1155805A publication Critical patent/GB1155805A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/62—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors
    • H03K17/6221—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors combined with selecting means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

1,155,805. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. 7 March, 1968, No. 11048/68. Heading H4K. In a time division multiplex telephone exchange in which each call is set up via a series of transistor gates, successive transistors used for a call are interconnected in alternating current manner by capacitors which are discharged by pulses applied between successive time slots. The Figure shows two cross-point transistors VT1 and VT2 in successive switching arrays. To establish a connection via these two transistors a pulse is applied to the base of each transistor causing them to conduct. An alternaing current path is thus established between them via a capacitor C1 Between successive connections a pulse is applied to the base of a transistor VT4 causing it and another transistor VT5 to conduct discharging the capacitor C1 and the inherent capacitance C2 of the line. The pulses applied to the bases of the transistors VT1 and VT2 are limited by busy indicator transistors VT3. Reflection attenuating resistances R2 and anti-parasitic beads B are included in the line.
GB1104868A 1968-03-07 1968-03-07 Improvements in or relating to Time Division Multiplex Circuits Expired GB1155805A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1104868A GB1155805A (en) 1968-03-07 1968-03-07 Improvements in or relating to Time Division Multiplex Circuits
CH351969A CH497102A (en) 1968-03-07 1969-03-07 Automatic telephone exchange on a time division basis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1104868A GB1155805A (en) 1968-03-07 1968-03-07 Improvements in or relating to Time Division Multiplex Circuits

Publications (1)

Publication Number Publication Date
GB1155805A true GB1155805A (en) 1969-06-25

Family

ID=9979050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1104868A Expired GB1155805A (en) 1968-03-07 1968-03-07 Improvements in or relating to Time Division Multiplex Circuits

Country Status (2)

Country Link
CH (1) CH497102A (en)
GB (1) GB1155805A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385286A1 (en) * 1977-03-25 1978-10-20 Siemens Ag PROCEDURE FOR TRANSMITTING ENCODED INFORMATION IN BINARY FORM
GB2324005A (en) * 1997-02-19 1998-10-07 Nec Corp Receiver circuit for a TDMA radio apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385286A1 (en) * 1977-03-25 1978-10-20 Siemens Ag PROCEDURE FOR TRANSMITTING ENCODED INFORMATION IN BINARY FORM
GB2324005A (en) * 1997-02-19 1998-10-07 Nec Corp Receiver circuit for a TDMA radio apparatus
AU728948B2 (en) * 1997-02-19 2001-01-18 Nec Corporation Receipt circuit for a TDMA radio apparatus
GB2324005B (en) * 1997-02-19 2001-07-18 Nec Corp Receiver circuit for a TDMA radio apparatus
US6404748B1 (en) 1997-02-19 2002-06-11 Nec Corporation Receipt circuit for a TDMA radio apparatus

Also Published As

Publication number Publication date
CH497102A (en) 1970-09-30

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