Telephonic communications – Repeater – Component processes bidirectional signals
Patent
1984-06-21
1986-11-11
Rubinson, Gene Z.
Telephonic communications
Repeater
Component processes bidirectional signals
379348, 379402, H04B 158
Patent
active
046224416
ABSTRACT:
A subscriber line interface circuit is provided for a telephone system for interconnecting a two-wire telephone channel with a four-wire telephone channel. The circuit includes a pair of power amplifiers employing complementary circuitry and being coupled in complementary fashion to the two-wire channel so as to provide for both DC electrical excitation to the two-wire channel, as well as providing for an impedance match over the voice frequency spectrum, thereby reducing power dissipation while improving the coupling of voice and/or data signals. The presence of any noise on power line is rejected by use of transistor biasing circuits and by use of feedback circuitry. Both resistive and capacitive feedback branches are provided for the impedance matching.
REFERENCES:
patent: 4317963 (1982-03-01), Chea, Jr.
patent: 4388500 (1983-06-01), Regan
patent: 4433213 (1984-02-01), Albers et al.
patent: 4514595 (1985-04-01), Rosenbaum et al.
patent: 4532381 (1985-07-01), Rosenbaum et al.
patent: 4539438 (1985-09-01), Rosenbaum et al.
J. Ayres; "One Peril of the Digital Age"; Telephony; Nov. 17, 1980; pp. 48-50.
ITT Corporation
Morris Jeffrey P.
Myers Randall P.
O'Halloran John T.
Rubinson Gene Z.
LandOfFree
Two-wire/four wire communication interface with noise rejection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-wire/four wire communication interface with noise rejection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-wire/four wire communication interface with noise rejection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-378290