INTRODUCTION

The KA22900 is a monolithic intergrated circuit which consists of a 3V one chip tuner and FM multiplex for AM/FM radios and head phone radios.

FUNCTIONS

* FM Stage : RF/IF/AF amp, Quadrature Detector, MIX, OSC, Tuning Indicator.

* AM Stage : RF/IF/AF amp, Detector, MIX, OSC, AGC, Tuning Indicator.

* MPX Stage : PLL amp, Decoder, Flip Flop, VCO Stop, Phase Detector, Stereo Indicator.

FEATURES

· 3V one chip tuner with built - in FM Multiplex

· No AM detect coil, IF coupling capacitor, FM IF by-pass capacitor needed.

· Built-in tuning indicator function.

· Built-in AM/FM selection switch.

· Minimum number of external parts required.

· Wide operating voltage range : VCC = 1.8V ~ 7V

· Low distortion (FM IF : 0.4, AM IF : 1, 0.2 (Typ) ).