Audio ICs AM radio / FM IF stereo system IC BA1442A The BA1442A is an AM radio and FM IF stereo system IC developed for radio cassette players.
The FM circuit is comprised of a differential IF amplifier, a double-balance type quadrature detector, and a PLL-type stereo MPX circuit.
The AM circuit is comprised of a local oscillator, a double-balanced mixer, an IF amplifier, a detector, and an AGC circuit.
FApplications Radio cassette players FFeatures 1) The “S” curve characteristic of the FM detector can be used for upper heterodyne (“N” curve) operation.
2) Audio high cut and low cut can be used to improve the AM fidelity.
3) A reference voltage supply is provided to ensure good frequency s...

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