Telephone ring signal converter

The TCA3385 is a high efficiency telephone ring signal converter designed for use with TCA3386 (it can also be used stand-alone). These devices, together with a microprocessor, form the basis for a high-performance feautre telephone set.

The circuit includes a switching regulator which converters the ring signal from the telephone line into a DC supply signal suitable for powering the other devices in the telephone, e.g. TCA3386 and the MPU, during the ringing phase.