REPRODUCING CONTROL CIRCUIT IN IMAGE KARAOKE SYSTEM

摘要

The reproduction control circuit in an image song accompaniment system, which has a first filter for removing the noise of a pulse signal; a first amplifier for amplifying the filtered sound signal and mike touch pulse signal; a sound level controller for controlling the level of the amplified sound signal; and a second amplifier for amplifying the sound signal controlled by the sound level controller, comprises an operation amplifier for operation-amplifying the mike touch pulse signal from the first amplifier; a second filter connected to the output terminal of the operation amplifier via series-connected diode and resistor, for filtering only the mike touch pulse signal over a predetermined level output from the operation amplifier; and a counter for counting the number of the mike touch pulse signals filtered by the second filter and outputting it a reproduction control signal.