Stereo decoder and method for processing pilot signal

A method for generating a reference signal around a predetermined frequency based on a pilot signal, comprising the steps of:

• providing a first auto-calibration circuit to generate a first control signal;
• providing a slicer to convert the pilot signal into a square wave signal;
• providing a phase-locked loop (PLL) circuit to generate an oscillation frequency in response to the first control signal;
• and
• enabling the PLL circuit to receive the square wave signal directly to generate the reference signal around the predetermined frequency in response to the oscillation frequency.

An FM receiver, comprising:

• an FM demodulator for generating a MPX signal in response to an FM signal;
• a stereo decoder, comprising an auto-calibration circuit to generate a control signal, for receiving the MPX signal to generate a reference signal in response to the control signal;
• a multiplexer for receiving the MPX signal to generate an audio signal in response to the reference signal;
• and
• an audio signal processor for de-emphasizing the audio signal.

A stereo decoder for generating a reference signal around a predetermined frequency based on a pilot signal, comprising:

• means for generating a first control signal;
• means for converting the pilot signal into a square wave signal;
• means for receiving the square wave signal directly to generate an oscillation frequency in response to the first control signal;
• and
• means for generating the reference signal around the predetermined frequency in response to the oscillation frequency.