A high-voltage IC for a transformerless trunk and subscriber line interface
- 1 August 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 16 (4) , 261-266
- https://doi.org/10.1109/JSSC.1981.1051587
Abstract
A new high-voltage, junction-isolated, complementary bipolar technology has been used to fabricate an IC for a transformerless trunk and subscriber line interface. The new technology provides both vertical p-n-p and n-p-n transistors with BV/SUB CE0/ greater than 60 V, betas of 100, and f/SUB T/'s of 200 MHz. It permits the straightforward op amp realization of a new op amp circuit configuration in transformerless line circuits. The new configuration uses the high-voltage IC plus some low voltage control circuitry to provide limited current battery-feed, loop-closure detection, reverse-battery signaling, two-wire to four-wire conversion, lightning protection, power-down capability, and longitudinal performance which is independent of the battery-feed current magnitude.Keywords
This publication has 2 references indexed in Scilit:
- Design of an integrated circuit for the T1C low-power line repeaterIEEE Journal of Solid-State Circuits, 1979
- Ion implanted, compatible, complementary PNP's for high slew rate operational amplifiersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1972