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 linesInfo
- 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
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.
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) |
-
1977
- 1977-08-12 IT IT2671677A patent/IT1114645B/en active
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