Portable radio communication device having signal processing circuit with presetting function

摘要

A portable radio communication device has a presetting circuit which includes a capacitor having a certain discharge time. The device is provided with a power supply switch having three terminals. On the connection of the first two terminals of the switch, power is supplied to the device. On the connection of the second and third terminal, power supply is stopped and a discharge path is provided for the capacitor. Thus when the device is turned ON and then momentarily turned OFF, and ON again, the capacitor discharge time is reduced.