电子元件与材料2024，Vol.43Issue(5)：603-611,9.DOI:10.14106/j.cnki.1001-2028.2024.1506
一种高速多级全差分放大器设计
A design of a high-speed multi-stage fully differential amplifier
摘要
Abstract
A high-bandwidth low-noise fully differential amplifier was proposed with complementary bipolar technology,which can realize fully differential or single-ended-to-differential conversion.A novel H-bridge input structure was proposed to achieve a high slew rate and low distortion.Furthermore,the amplifier utilized an internal common-mode feedback loop to feedback the common-mode signal to two gain stages,enabling adjustment of the differential output's common-mode level.This feature made the high-speed,fully differential amplifier particularly suitable for buffering and amplifying the input signals of high-speed and high-precision analog-to-digital converters(ADCs).The amplifier incorporated a transconductance linearization loop in the Class AB output stage,providing effective biasing to reduce distortion and ensure a high dynamic range.The circuit and layout design of the amplifier were performed using EDA tools.The post-layout simulation results show that with a±5 V power supply,the amplifier achieves a-3 dB bandwidth of 366 MHz,a slew rate greater than 1150 V/ps,an input voltage noise below 10 nV/√Hz,and an input offset voltage within±1 mV.关键词
双极型/全差分/高摆率/高速/共模反馈Key words
bipolar/fully differential/high slew rate/high-speed/common-mode feedback分类
信息技术与安全科学引用本文复制引用
沈念一,秦雷,周三博..一种高速多级全差分放大器设计[J].电子元件与材料,2024,43(5):603-611,9.基金项目
国家自然科学基金(U2006218) （U2006218）
北京市属高等学校高水平科研创新团队建设支持计划项目(BPHR20220124) （BPHR20220124）
