JSSC 2010第2期Other0.13μm

A 250 MHz 14 dB-NF 73 dB-Gain 82 dB-DR Analog Baseband Chain With Digital-Assist

一款用于超宽带系统的250 MHz模拟基带链，具有高增益、低噪声和宽动态范围。

1.2 V, 250 MHz, 73 dB增益, 82 dB动态范围, 14 dB噪声系数

模拟基带链电流模式滤波器超宽带数字辅助校准低噪声

▸电流模式放大器实现宽带宽和高动态范围增益

▸采用电流模式Sallen-Key低通滤波器有效抑制带外干扰

▸数字辅助DC偏移校准改善二阶失真

Abstract

ng-Y uan Shih, Member , IEEE, Chien-Nan Kuo , Member , IEEE, Wei-Hsien Chen, Tzu-Yi Y ang, and Kai-Chenug Juang Abstract—A 250 MHz analog baseband chain for Ultra-Wide- band was implemented in a 1.2 V 0.13 m CMOS process. The chip has an active area of 0.8 mm /50. In the analog baseband, PGAs and ﬁlters are carried out by current-mode ampliﬁers to achieve wide bandwidth and wide dynamic range of gain, as well as low noise and high linearity. Besides, a current-mode Sallen–Key low-pass ﬁlter is