INTRODUCTION
The KA9201, which is the RF amplifier, is a monolithic integrated circuit designed for three-spot type optical pickup of the compact disc player.
It consists of a RF signal processing circuit, Focus Error AMP, Tracking Error AMP, Focus OK Detector, Mirror Detector, Defect Detector, EFM Comparator and automatic power controller for laser diode.

FEATURES
• Functions: RF AMP
    Focus Error AMP
    Tracking Error AMP
    Focus OK Detector
    Mirror Detector
    Defect Detector
    EFM (Eight to Fourteen Modulation)
    Comparator
    Automatic Asymmetry Control AMP
    Center Voltage Buffer
    APC (Automatic Power Control) AMP for Photo- Diode and Laser-Diode drive
• Single power supply operation (+ 5V) as well as split power supply operation (± 5V)
• Low power consumption (100mW at ± 5V, 50mW at + 5V)
• Built-in automatic power controller use for P-sub and N-sub of the laser diode
• Minimum number of external components required
• Built.in disc defect detection circuit for improvement to playability
• Recommend operation supply voltage range: VCC ~VEE : 3.4 ~ 11V VCC ~ DGND : 3.4 ~ 5.5V
• Power Supply Condition: