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Multi-standard dual-carrier stereo decoder (TDA9873H)

Source: InternetPublisher:newlandmark Keywords: carrier stereo decoder channel phase locked loop Updated: 2020/03/05

28. Multi-standard dual<strong>carrier</strong><strong>stereo decoder</strong> (TDA9873H).gif

Shown is a multi-format dual- carrier stereo decoder (TDA9873H). It is mostly used in the audio demodulation
circuit of multi-standard TV sets. After the second audio intermediate frequency signal from the front-end circuit is input from the @ pin, it is demodulated by its internal FM demodulator, narrow-band phase-locked loop processing,
audio amplifier amplification, stereo decoding, adjustment, digital recognition and pilot phase- locked loop processing , finally after AF switching,
the left and right channel audio signals are output by pin ① and pin ② respectively, and the center channel audio signal is output by pin @ .


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