A 420μW 100GHz-GBW CMOS ProgrammableGain Amplifier Leveraging the Cross-Coupled Pair Regeneration

📋 论文概要

本文提出一种利用交叉耦合对再生技术的可编程增益放大器，以420μW功耗实现100GHz增益带宽积，解决了低功耗宽带宽放大器设计的挑战。

💡 主要创新点

• 利用交叉耦合对的再生特性实现增益增强，同时保持极低功耗
• 在亚毫瓦功率水平下达到100GHz增益带宽积，显著优于传统宽带放大器结构

🏷 关键词

📄 原文摘要

Cross-coupled pairs are certainly among the most widely adopted fundamental circuits still in use today. This elegant device arrangement yields broadband positive feedback with high gain and low power, desirable features both in analog and digital applications [1]. Its small signal properties are consistently leveraged in oscillators, impedance negators and to boost gain of transconductors, while the bistable behavior is exploited in static latches and memory cells. Traditionally, the regeneration capability is leveraged in the design of sense amplifiers and high-speed comparators. In this work, we investigated the performance of the cross-coupled pair for discrete-time linear amplification and we show that its regeneration feature proves to be attractive for implementing Programmable-Gain Amplifiers (PGAs). PGAs are required to provide dB-linear gain control. This involves the implementation of an exponential function, challenging to achieve with the

👥 作者与机构

Marco Sautto1, Fabio Quaglia2, Giulio Ricotti2, Andrea Mazzanti1

University of Pavia, Pavia, Italy, 2STMicroelectronics, Cornaredo, Italy