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.
双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平衡桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。
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。
"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.
“自动温度补偿”能自动调节放大器功率的大小来平衡因温度变化引起的灵敏度变化现像。
PZT micro -force sensors were calibrated by bimorph and electronic balance in static state and by bimorph and charge amplifier in dynamic state, small signal was tested by amplifier.
采用双晶片探头和电子天平对PZT微力传感器进行静态力标定，进而利用双晶片探头和电荷放大器对PZT微力传感器进行准静态标定，微小信号检测通过锁相放大器来实现。
PZT micro -force sensors were calibrated by bimorph and electronic balance in static state and by bimorph and charge amplifier in dynamic state, small signal was tested by amplifier.
采用双晶片探头和电子天平对PZT微力传感器进行静态力标定，进而利用双晶片探头和电荷放大器对PZT微力传感器进行准静态标定，微小信号检测通过锁相放大器来实现。
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