ALARM CIRCUIT VARING AMPLITUDE AND CYCLE OF VOICE ACCORDING TO THE TIME

摘要

An alarm circuit controllable the loudness and period of a tone consists of a divider (18) for the use of alarm, a time variation (13), a decoder (14) for controlling the alarm loudness, a decoder (15) for controlling the alarm period, and an exclusive-OR gate (16) for controlling the alarm output. The decoder (14) and an alarm enable terminal are connected to the exclusive-OR gate.