应用于网络安全协处理器的真随机数产生器

介绍一款基于环形振荡器的真随机数产生器。电路使用固定频率时钟采样可控频率振荡器的输出，使用级间反馈随机改变可控频率振荡器的振荡频率。设计启动电路来保证环形振荡器快速起振，在使能信号无效时断开振荡电路以节省功耗。电路采用CMOS 0．18μm标准工艺实现，使用Hspice-RF仿真环形振荡电路的相位抖动以获得最优设计参数。仿真结果表明，电路在输出速率为1Gb／s时产生的随机序列具有良好的随机性，该设计可用于网络安全协处理器中。

True Random Number Generator for Network Security Co-processor

This paper introduces a ring oscillator based True Random Number Generator(TRNG) for network security co-processor.To obtain better randomicity,the circuit utilizes a fixed frequency clock to sample the output of a frequency variable high speed ring oscillator.Inter-stage feedback ring is introduced to control the frequency of the high speed ring oscillator to accumulate the phase noise.Start-up circuit is designed not only to make the ring oscillator much easier to oscillate,but also to reduce the power di...