An operational amplifier sharing (op-amp sharing), non-flipped folded Bernoulli mapping chaos-based true random number generator (TRNG) is proposed in this paper. Based on the concept of op-amp sharing for non-flipped folded Bernoulli mapping, the number of stages is reduced from two stages to one, which improves power efficiency of the system. Among them, a novel transconductance enhancement recycling amplifier is adopted for power reduction. The entire system has been implemented in a standard 180 nm process with power supply of 1.2V, and the output speed of random number is 500k Bits/s with power consumption of only 4.68 μW. The TRNG system is verified over a wide range of process and temperature variations, including TT corner 25 °C, FF corner 0 °C, and SS corner 85 °C with post-layout simulation. All the generated random bits pass National Institute of Standards and Technology (NIST) SP800-22 randomness tests successfully.

本文提出了一种运算放大器共享（op-ampsharing）、非翻转折叠伯努利映射基于混沌的真随机数发生器（TRNG）。基于非翻转折叠伯努利映射的运算放大器共享概念，级数从两级减少到一级，从而提高了系统的功率效率。其中，采用新型跨导增强回收放大器进行功率降低。整个系统采用标准的180nm工艺实现，电源电压为1.2V，随机数输出速度为500k Bits/s，功耗仅为4.68 μW。TRNG 系统在广泛的工艺和温度变化范围内进行了验证，包括 TT 角 25 °C、FF 角 0 °C 和 SS 角 85 °C 以及布局后模拟。