介绍了 ISO/ IEC144 4 3中 Type B类型非接触式 IC卡实现抗冲突的算法 ,设计了一种适用于非接触式IC卡的具有抗冲突功能控制逻辑的 VL SI结构 ,并用 VHDL 语言进行了仿真。电路中提出了确定时间片的伪随机算法来实现抗冲突功能。用 1μm CMOS单元库进行综合 ,在 2 0 MHz时钟频率下 ,电路的规模为 70 0 0门左右 ,关键路径延时为 46 ns。该电路可应用于实际的非接触式 IC卡控制器 ,具有一定的实用价值 The algorithm of anti-collision of Type B non-contact IC card in ISO / IEC144 4 3 was introduced, and a VLSI structure with anti-collision function control logic for non-contact IC card was designed and implemented in VHDL simulation. Circuit to determine the time-piece of the pseudo-random algorithm to achieve anti-collision function. Integrated with a 1μm CMOS cell library, the circuit size is about 70,000 at a 20 MHz clock frequency and the critical path latency is 46 ns. The circuit can be applied to the actual non-contact IC card controller, has some practical value