目前,无效零消隐与动态扫描技术已被应用于新型数字仪器、智能仪器中。本文介绍利用CMOS电路实现无效零消隐和扫描显示的电路设计原理。一、自动消隐无效零的电路原理所谓无效零,包括两种情况:(1)整数前边的零,例如00325前面的两个零;(2)小数点后边的无效零,例 At present, invalid zero blanking and dynamic scanning technology has been applied to new digital instruments, smart instruments. This article describes the use of CMOS circuits to achieve null zero blanking and scanning display circuit design principles. First, the auto-blanking invalid zero circuit theory The so-called invalid zero, including two cases: (1) the front of the integer zero, for example 00325 in front of the two zero; (2) after the decimal point invalid zero, for example