To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.
In this paper a new semi-numeral model for double-clad fiber amplifier according to principle of photons balance was given.
本文采用分段方法，利用光子数平衡原理建立了半数值双包层掺稀土光纤放大器理论模型。
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"Automatic temperature Compensation" power amplifier can automatically adjust the size to balance because of the sensitivity caused by the change of temperature changes are like.