CS6420 chip equivalent, full-duplex speakerphone chip.
l Single-chip full-duplex hands-free operation l Automatic gain control l Optional 34 dB microphone preamplifier l Integrated mute and volume control l Integrated 80 dB I.
Most modern speakerphones use half-duplex operation, which switches transmission between the far-end talker and the speakerphone user. This is done because the acoustic coupling between the speaker and microphone is much higher in speakerphones than .
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