A monolithic telephone subscriber loop interface circuit
- 1 August 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 16 (4) , 270-278
- https://doi.org/10.1109/JSSC.1981.1051589
Abstract
An integrated circuit that interfaces a subscriber loop with the digital telephone exchange has been produced with conventional high-voltage IC technology. The monolithic SLIC controls DC loop current, converts signal transmission from two-wire to four-wire, and suppresses longitudinal induction. Bias control circuitry automatically reduces standby power when subscriber equipment is detected on-hook. High-voltage circuit techniques maintain performance when the supply voltage exceeds the n-p-n transistor BV/SUB CE0/, and circuit partitioning with two discrete transistors yields manageable junction temperature and an economical 102/spl times/112 mil die size.Keywords
This publication has 3 references indexed in Scilit:
- Integrated circuits for telephonyProceedings of the IEEE, 1980
- Line Circuit Interfaces for a Digital Switching SystemIEEE Transactions on Communications, 1979
- A passive laser-trimming technique to improve the linearity of a 10-bit D/A converterIEEE Journal of Solid-State Circuits, 1976