The embedded headphone "amp" is probably just a good-enough chip amp.
内置的耳机功放或许只是一片还不错的功放芯片。
A cheap builtin audio chip is likely to have some sort of low pass filter in its amp to avoid smoking itself though.
一个廉价的内置音频芯片可能有某种在放大器的低通滤波器，避免吸烟本身虽然。
This paper introduces the principles of IN AMP chip AD620, and the feature parameters and main characterial curves, it also presents some typical application circuits.
本文简要概述了单片仪器放大器AD620的结构原理及其性能特点和主要关系曲线，并给出了一些典型应用。
Ex: Digital Audio Amp. I/C, GPS Chip for Cellular Phone, Telephone Answering I/C, Fluorescent Lamp Recycling System(Looking for Chinese Distributor)
出口：手机放大器集成电路，全球定位芯片等，电话应答集成电路，天线循环灯系统。
Ex: Digital Audio Amp. I/C, GPS Chip for Cellular Phone, Telephone Answering I/C, Fluorescent Lamp Recycling System(Looking for Chinese Distributor)
出口：手机放大器集成电路，全球定位芯片等，电话应答集成电路，天线循环灯系统。
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