关键词：FPGA；时序电路；RS 232；串行通信 [gap=628]Keywords：FPGA；time sequence circuit；RS 232；serial communication ...
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synchronous time-sequence circuit 同步时序电路
time sequence driving circuit 驱动时序电路
time-sequence logic circuit 时序电路的逻辑
The proposed method doesn't need hardware synchronization circuit and can perform the calculation of fundamental positive sequence component of the supply voltage in real time.
这种方法不需要硬件同步电路，能实时地计算电源电压中的基波正序分量。
This circuit is implemented on a monolithic chip, which is comprised of a period time sampling unit, a peri-od distanee preset unit, an arithmetic unit, a clock and time sequence unit.
电路主要由周期计时电路、周期数据预置电路、运算电路及时钟和时序等电路构成。
S7-200 series PLC of SIEMENS company is used in order to achieve the aim of controlling the time-sequence, precision and charge circuit.
用当前占主流地位的西门子s7 - 200系列PLC进行编程，实现合成回路动作过程的时序控制、精度控制以及充电电路的控制等。
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