【摘要】 一种多用途ＢＣＤ码逻辑信号发生器，由多谐振荡器、异步１０进制加法计数器、２线４线译码器、４选１数据选择器、１０进制数码键盘，编码锁定电路及ＢＣＤ码存储器等构成．能快速、方便、准确、灵活地产生任一类型的４位ＢＣＤ码，为测试，调试数字电路及微处理器的各输入端子，提供了一种简易可行的方法，同时该电路稍经扩展，便可构成多种有价值的应用电路．更多还原

【Abstract】 In this paper,we present a kind of BCD code logic signal generator for versatile purpose.It is composed of mulitvibrator,asynchronous decimalcoded add counter,binarycoded four output decoder,one out of four date selector,decimal nixie keyboard,coded lockin circuit and BCD code memory device.It can generate any kinds of 4bit BCD codes quickly and correctly.Thus,it is convenient and flexible for us to measure and adjust the digit circuit and microprocessor.Meanwhile,if the circuit is changed slightly,many valuable and practical circuits will be made up.更多还原