JSSC 2021第12期Digital Circuits0.5μmNeural Network Accelerator

A 5-V Dynamic Class-C Paralleled Single-Stage Ampliﬁer With Near-Zero Dead-Zone

一种5V动态Class-C并联单级放大器，具有近零死区控制，适用于大电容负载快速缓冲。

5V CMOS, 3.1μA静态电流, 10.3V/μs(0.8nF)和0.86V/μs(10nF)压摆率, 10-127kHz GBW

动态Class-C放大器并联放大器近零死区控制轨到轨输入输出跨导提升技术

▸动态Class-C放大器与线性OTA并联设计

▸近零死区控制技术实现平滑切换

▸电流再分配技术提升跨导并降低静态功耗

Abstract

For fast buffering of large stepwise input to an nF-range capacitive load, this article presents a 5-V rail-to-rail (RTR) input–output paralleled-ampliﬁer (PA) in which a dynamic class-C ampliﬁer (DCCA) and a linear single-stage operational transconductance ampliﬁer (OTA) are combined in parallel. During slew time, the DCCA, which is designed to consume a near-zero static current, dominantly supplies the dynamic current up to 8.5 mA to the output. When the output gets closer to the ﬁne-settling