Telecommunications device with d.c./d.c. converter, has microprocessor forming controller and linear regulator supplying controller operating voltage during start-up phase

摘要

The device has a microprocessor for controlling telecommunications functions and a d.c./d.c. converter supplied from the telephone line with a base unit (110), a controller monitoring the base unit's output voltage and controlling the base unit to output a desired voltage and a linear regulator that supplies the controller with operating voltage during the start-up phase. The microprocessor (115) in the telecommunications device forms the controller.