JPS5711594A - Electronic switch network - Google Patents

Electronic switch network

Info

Publication number
JPS5711594A
JPS5711594A JP8707380A JP8707380A JPS5711594A JP S5711594 A JPS5711594 A JP S5711594A JP 8707380 A JP8707380 A JP 8707380A JP 8707380 A JP8707380 A JP 8707380A JP S5711594 A JPS5711594 A JP S5711594A
Authority
JP
Japan
Prior art keywords
circuit
switch network
transformer
switch
electronic switch
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.)
Pending
Application number
JP8707380A
Other languages
Japanese (ja)
Inventor
Wataru Naito
Shinichiro Obara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8707380A priority Critical patent/JPS5711594A/en
Publication of JPS5711594A publication Critical patent/JPS5711594A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To improve the transmission characteristic and to prevent the deterioration of SN through the insertion of a switch network, by connecting the secondary side of (n) sets of transformers connecting channels at the primary side with each other via an electronic switch and providing a load impedance circuit in series with the switch. CONSTITUTION:To the secondary side of a transformer T1 to the primary side of which is connected with a main trunk CT, a transformer T2 connected to an extension circuit LC via a CMOS switch SW, is connected to constitute an electronic switch network for a button telephone device. At the secondary side of the transformer T1, the negative impedance circuit N having an operational amplifier A is connected in series. Further, by suitably selecting the circuit constant of the circuit N, the impedance from input terminals N1 and N2 is taken as negative characteristic and the negative impedance compensate the transmission loss by the switch network SW and the transformers T1, T2, the deterioration of the SN ratio is prevented and the transmission characteristic is improved.
JP8707380A 1980-06-26 1980-06-26 Electronic switch network Pending JPS5711594A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8707380A JPS5711594A (en) 1980-06-26 1980-06-26 Electronic switch network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8707380A JPS5711594A (en) 1980-06-26 1980-06-26 Electronic switch network

Publications (1)

Publication Number Publication Date
JPS5711594A true JPS5711594A (en) 1982-01-21

Family

ID=13904761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8707380A Pending JPS5711594A (en) 1980-06-26 1980-06-26 Electronic switch network

Country Status (1)

Country Link
JP (1) JPS5711594A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212991A (en) * 1985-03-18 1986-09-20 Nitsuko Ltd Key telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212991A (en) * 1985-03-18 1986-09-20 Nitsuko Ltd Key telephone set

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