The system consists of amplifiers, a 12 bit A/D convertor, a PC/AT computer and system softwares.

该系统由放大器、模数转换器、微机和系统软件组成。

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D. C. and A. C. characteristics of non-ideal operational amplifiers are examined from a general viewpoint, and a set of useful expressions and conclusive results are obtained.

本文从普遍性的意义上讨论了非理想运算放大器的交、直流性能，给出了一系列有用的公式和结论。

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At the core of the Fidelio SoundBar are high quality TI Class-D amplifiers - with a built-in DAC - powered by a compact SMPS (Switch-Mode-Power-Supply) to provide a full digital architecture, delivering highly efficient audio amplification and premium audio quality.

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With dynamic, room-filling sound quality superior to laptops or other currently-available devices of its kind, the IS9181 offers built-in 3W front facing tuned stereo speakers, as well as a 10W subwoofer with class D amplifiers for powerful bass response.

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The Hitachi Sound Bars feature four high efficiency full range speakers and two high frequency tweeters with state-of-the-art Class D digital amplifiers.

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