JSSC 2020第4期Power Management180nmNeural Network Accelerator

An Energy-Efficient Comparator With Dynamic Floating Inverter Amplifier

一种采用动态浮动逆变器放大器的能效比较器设计，显著提升能效并降低噪声。

180nm CMOS, 1.2V, 46µV输入噪声, 1pJ/次比较

能效比较器动态浮动逆变器电流复用噪声优化工艺角鲁棒性

▸采用逆变器输入对实现电流复用

▸动态偏置提升gm/ID并降低噪声

▸减少工艺角和输入共模电压对性能的影响

Abstract

This article presents an energy-efﬁcient comparator design. The pre-ampliﬁer adopts an inverter-based input pair powered by a ﬂoating reservoir capacitor; it realizes both current reuse and dynamic bias, thereby signiﬁcantly boosting g m /ID and reducing noise. Moreover, it greatly reduces the inﬂuence of the process corner and the input common-mode voltage on the comparator performance, including noise, offset, and delay. A prototype comparator in 180 nm achieves 46-µV input-referred noise whil