MUSIC PLAYING DEVICE USING KEY OF TELEPHONE TERMINAL AND METHOD THEREOF

摘要

PURPOSE: A music playing device using key of telephone and method thereof is provided to sound different identification sound whenever respective key is pressed so as to identify whether or not telephone keys are accurately pressed. CONSTITUTION: The music playing device using key of telephone comprises: a key input unit(20) having number keys(0-9) for telephone number dialing, * key and # key; a MPU(22) identifying the pressed keys and generating melody select control signal for distinguishing the key signals; a melody IC(24) generating various melody frequency by the melody select control signal of the MPU; a filter(26) filtering the melody frequency; and an amplifier(28) amplifying the outputted melody tone to prescribed level and then transmitting it through a speaker.