模拟退火算法在低功耗BIST中的应用

提出了应用模拟退火算法在一定长度的测试矢量集中寻找有效测试矢量的近似最优分组 ,在尽量减少面积开销的同时减少有效测试矢量的个数 ,并且通过置入种子的方法使LFSR产生近似最优分组的矢量 ,因此在保障故障覆盖率的前提下达到了降低测试功耗的目的 .实验表明 ,采用此方法可降低测试功耗 70 %以上 ,而故障覆盖率维持不变 .此外 ,由于减少了测试矢量 ,测试时间也大为缩短 ,在实时系统中 。

Multi-seed-encoding BIST Design with Low Power Consumption Based on the Folding Counter

In this paper, by using the folding counter and linear feedback shift register, a new vector generator is proosed. The decisive testing patterns are generated by using the selected fold distance. Then the folding counter seeds are encoded by the specialized seed encoder and clock gating, the ineffective patterns do not act upon the circuit under test, these testing patterns are designed to form a pseudo single input change set, so as to lead to prominent decreases in power consumption and redundant testing patterns generated by different seeds, without losing stuck-at fault coverage. Experimental results based on ISCAS＇85 benchmark circuits demonstrate the efficiency of the approach.