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。
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.
为此，以矩形压电微悬臂梁结构作为换能单元，通过对压电层等效电流源和单相桥式整流电路的理论及相关公式的推导，得出微能量功率的计算公式。
An energy harvesting structure based on rectangle piezoelectric microcantilever was set up and the process of energy transform from vibration to electric was generally analyzed.
本文以三相桥式晶闸管整流电路为例，讨论波形分析法的原理、采样电路与微型计算机接口电路的设计及应用程序的设计。
As an example, the principle of waveform analysis, the design of sampling circuit, interface and applied programs for 3-phase bridge rectifier are discussed.
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