JPS5787630A - Hybrid circuit using voltage-current conversion - Google Patents

Hybrid circuit using voltage-current conversion

Info

Publication number
JPS5787630A
JPS5787630A JP16412080A JP16412080A JPS5787630A JP S5787630 A JPS5787630 A JP S5787630A JP 16412080 A JP16412080 A JP 16412080A JP 16412080 A JP16412080 A JP 16412080A JP S5787630 A JPS5787630 A JP S5787630A
Authority
JP
Japan
Prior art keywords
impedance
voltage
subscriber
wire
circuit
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
JP16412080A
Other languages
Japanese (ja)
Inventor
Kenji Narita
Takeshi Sakai
Shuji Kimura
Nobuhisa Kamoi
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 JP16412080A priority Critical patent/JPS5787630A/en
Publication of JPS5787630A publication Critical patent/JPS5787630A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/03—Hybrid circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To make large scale circuit integration easy, by reducing the capacitance of a coupling capacitor with 4-wire side, through the elimination of need for a capacitor for DC component cut at a subscriber side and increasing the impedance of resistance bridge. CONSTITUTION:Impedance is increased by using constant current filters 4, 4' to the supply side of a DC power supply E1 of a subscriber circuit. The impedance of a resistance bridge 2 and a voltage amplifier 3' is increased and the capacitance of capacitors C2, C3 is reduced. The voltage amplifiers 3, 3' are used for the connection between the subscriber and the 4-wire side to increase the voltage amplification factor and the impedance, and current Miller circuits CM1, CM2, CM3, CM4 are used to avoid the relation of DC potential of both the circuits to enable the reception/transmission of AC signals only. A positive bias V3 is given to the input side of a voltage amplifier 3 of the 4-wire reception side 4WR and the transmission of the AC signal from the circuit CM2 to a subscriber line 6 is enabled.
JP16412080A 1980-11-21 1980-11-21 Hybrid circuit using voltage-current conversion Pending JPS5787630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16412080A JPS5787630A (en) 1980-11-21 1980-11-21 Hybrid circuit using voltage-current conversion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16412080A JPS5787630A (en) 1980-11-21 1980-11-21 Hybrid circuit using voltage-current conversion

Publications (1)

Publication Number Publication Date
JPS5787630A true JPS5787630A (en) 1982-06-01

Family

ID=15787121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16412080A Pending JPS5787630A (en) 1980-11-21 1980-11-21 Hybrid circuit using voltage-current conversion

Country Status (1)

Country Link
JP (1) JPS5787630A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07322309A (en) * 1994-05-26 1995-12-08 Nec Corp Two-wire/four-wire conversion circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07322309A (en) * 1994-05-26 1995-12-08 Nec Corp Two-wire/four-wire conversion circuit

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