AMAX Stereo Chipset

The MC13027 and MC13122 have been specifically designed for AM radio which can meet the EIA/NAB AMAX requirements. They are essentially the same as the MC13022A and MC13025 with the addition of noise blanking circuitry. The noise blanker consists of a wide band amplifier with an RF switch for blanking ahead the IF amplifier and a stereo audio blanker with adjustable delay and blanking times.

• Operating Voltage Range of 6.0 V to 10 V

• RF Blanker with Built–In Wide Band AGC Amplifier

• Audio Noise Blanker with Audio Track and Hold

• Mixer Third Order Intercept of 8.0 dBm (115 dBµV)

• Wide Band AGC Detector for RF Amplifier

• Local Oscillator VCO Divide–by–4 for Better Phase Noise

• Buffered Local Oscillator Output at the Fundamental Frequency

• Fast Stereo Decoder Lock

• Soft Stereo Blend

• Signal Quality Detector to Control Variable Q–Notch Filters for Adaptive

   Audio Bandwidth and Whistle Reduction

• Signal Quality Detector for AM Stereo

• Very Low Distortion Envelope and Synchronous Detectors

• Variable Bandwidth IF