AS3400 AS3410 AS3430 Low Power Ambient Noise-Cancelling Speaker Driver 1 General Description The AS3400/10/30 are speaker driver with Ambient Noise Cancelling function for handsets, headphones or ear pieces.
It is intended to improve quality of e.
g.
music listening, a phone conversation etc.
by reducing background ambient noise.
The fully analog implementation allows the lowest power consumption, lowest system BOM cost and most natural received voice enhancement otherwise difficult to achieve with DSP implementations.
The device is designed to be easily applied to existing architectures.
An internal OTP-ROM can be optionally used to store the microphones gain calibration settings.
The AS340...

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