← 返回 JSSC 论文列表JSSC 2009第3期RF & Wireless0.5μm SiGe BiCMOS
A 2425 GHz WLAN Direct-Conversion Receiver Front-End With Low-Distortion Baseban
一款针对WLAN 802.11b应用的2.5 GHz直接转换接收器前端，具有低失真基带滤波器。
3.2 dB DSB NF, 14 dBm OOB IIP3, -27 dBm IIP2, 30mA@2.7V
直接转换接收器低失真基带滤波器WLAN 802.11b电流模式滤波器自动带宽调谐
▸采用Gm-cell结构的直接转换架构
▸使用AC电流模式滤波器以降低电压摆幅需求
▸片上主从自动调谐器实现3%带宽调谐精度
Abstract
stract—Low-distortion I/Q baseband filters interface with
a 2.5 GHz RF receiver front-end configured as a Gm-cell in a
direct-conversion architecture targeted towards WLAN 802.11b
application. The active I/Q current-mode filters use AC current to
carry the large swing of both desired and blocker signals, relaxing
the voltage headroom requirement to a 1.2 V supply. An on chip
master–slave automatic tuner is used to lock the filter bandwidth
to a precision 20 MHz reference crystal oscillator , resulti