IT1114645B - Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines - Google Patents

Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines

Info

Publication number
IT1114645B
IT1114645B IT2671677A IT2671677A IT1114645B IT 1114645 B IT1114645 B IT 1114645B IT 2671677 A IT2671677 A IT 2671677A IT 2671677 A IT2671677 A IT 2671677A IT 1114645 B IT1114645 B IT 1114645B
Authority
IT
Italy
Prior art keywords
wire lines
amplifiers
circuit
bidirectional
wire
Prior art date
Application number
IT2671677A
Other languages
Italian (it)
Original Assignee
Wescom Switching
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 Wescom Switching filed Critical Wescom Switching
Priority to IT2671677A priority Critical patent/IT1114645B/en
Application granted granted Critical
Publication of IT1114645B publication Critical patent/IT1114645B/en

Links

Landscapes

  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

A hybrid electronic circuit connects telecommunication signals between bidirectional two and four wire telephone transmission channels. Termination impedances ensure matching to the lines with excellent longitudinal balance and also provide protection from abnormal voltages on the lines. A hybrid circuit connected to a two wire line through a terminating resistor has terminals for the line conductor and for the ringing circuit. Diodes provide protection for the inputs to amplifiers while further diodes limit their output voltage range. The four wire circuit is also coupled via amplifiers to these amplifiers. A gyrator circuit and an impedance network provides an inductive impedance for longitudinal balancing.
IT2671677A 1977-08-12 1977-08-12 Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines IT1114645B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT2671677A IT1114645B (en) 1977-08-12 1977-08-12 Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2671677A IT1114645B (en) 1977-08-12 1977-08-12 Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines

Publications (1)

Publication Number Publication Date
IT1114645B true IT1114645B (en) 1986-01-27

Family

ID=11220089

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2671677A IT1114645B (en) 1977-08-12 1977-08-12 Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines

Country Status (1)

Country Link
IT (1) IT1114645B (en)

Similar Documents

Publication Publication Date Title
US4567331A (en) Electronic hybrid having synthesized impedance circuitry
US4086534A (en) Circuit for wire transmission of high frequency data communication pulse signals
GB1389560A (en) Active two-wire to four-wire coupling circuit
US4203009A (en) Unbalanced/balanced converter circuits
WO1980000770A1 (en) Driving point impedance
CA1136229A (en) Electronic hybrid
GB916545A (en) Improvements in or relating to loud speaking telephone sets
IE44521B1 (en) A hybrid circuit arrangement
ES8304737A1 (en) Digital two-to-four wire converter for full duplex signals
IE801097L (en) Telecommunications line circuit
CA1078536A (en) Bilateral voice-signal controller for use in the two-wire portion of the telephone circuit
IT1114645B (en) Hybrid electronic circuit for telecommunications - has amplifiers forming coupling between bidirectional two wire lines and unidirectional four wire lines
US3810247A (en) Telephone set circuit
US4135064A (en) Impedance compensation of transmission line
US3814867A (en) Active shunt impedance for compensating impedance of transmission line
GB729405A (en) Improvements in or relating to electric wave filters employing waveguides
US3548111A (en) Impedance-matching arrangement for telephone circuit
GB2042848A (en) Line current feed and hybrid arrangement (system X)
GB1126753A (en) Electrical networks and transmission lines utilising them
GB906093A (en) Improvements in or relating to wave transmission systems
JPS6230546B2 (en)
US3160831A (en) Equal power loss impedance matching branching network
GB1257878A (en)
NL7510026A (en) Signal divider with decoupled output for cable transmission - has bridge network with impedance arms including impedance of signal source
RU2013003C1 (en) Device for matching of two- and four-wire paths