INTRODUCTION
The KA9270 is a monolithic integrated circuit designed for audio filter. It is used in compact disc player, digital audio tape recorder, etc.

FEATURES
• Functions: * Buffer for impedence matching
                * Low pass filter
                * De - emphasis control
                * Mute control
                * Reference voltage circuit ( 1/2 VCC AMP )
• Gain adjustable of audio output
• Minimum number of external parts required
• Recommand operation supply voltage range : 5.0 ~ 12.0V