以开关信号理论为指导 ,对电流型 CMOS电路中如何实现阈值控制进行了研究 .建立了实现阈值控制电路的电流传输开关运算 .在此基础上 ,设计了具有阈值控制功能的电流型 CMOS四值比较器、全加器及锁存器等电路 .通过对开关单元实施阈值控制后 ,所设计的电路在结构上得到了非常明显的简化 ,在性能上也获得了优化 .PSPICE模拟验证了所提出的电路具有正确的逻辑功能并且较之以往设计具有更好的瞬态特性和更低的功耗 . Under the guidance of the switching signal theory, how to realize the threshold control in the current-type CMOS circuit is studied, and the current-carrying switch operation of the threshold control circuit is established.On the basis of this, a current-mode CMOS four-value Comparators, full adders and latches, etc. After the threshold control of switching elements, the designed circuit is obviously simplified in structure and optimized in performance.PSPICE simulation verifies the proposed method The circuit has the correct logic function and has better transient characteristics and lower power consumption than the previous design.