提出了一种低功耗真随机数发生器,它基于简单的伯努利移位混沌映射,并通过对映射进行特殊扩展来保证在实际实现中保持鲁棒性.映射由开关电流技术实现,从而使其可以完全嵌入到片上密码系统中.采用流水线结构并用简单的异或电路来提高信息熵.该随机数发生器采用HJTC的0.18μmCMOSmixedsignal工艺进行流片,并通过测试对其统计特性进行了分析.芯片功耗仅为1.42mW,输出比特率为10Mbit/s. A low-power true random number generator based on simple Bernoulli shift-chaotic mapping is proposed, which guarantees the robustness in practical implementation through the special extension of the mapping.The mapping is realized by the switching current technique, So that it can be fully embedded into the on-chip cryptosystem.Adopting the pipeline structure and using a simple XOR circuit to improve the information entropy.This random number generator using HJTC 0.18μmCMOSmixedsignal process for film, and through the test of its statistical properties Analysis chip power consumption is only 1.42mW, the output bit rate of 10Mbit / s.