A counting and LED decoding circuit based on CPLD is designed by VHDL.
本文采用VHDL语言设计了基于CPLD的计数及LED译码电路。
The hardware is made up of the telephone circuit, decoding circuit and controlling circuit.
硬件部分主要由电话机线路、译码电路、解码电路、控制电路等几部分组成。
The observation circuit consists of 555 infrared emitting circuit, amplifying circuit and frequency decoding circuit.
监测电路包括555红外发射电路，放大电路以及频率译码电路。
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