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A Widely-Tunable Reconfigurable CMOS Analog Baseband IC for Software-Defined Radio
一款用于软件定义无线电的可重构CMOS模拟基带芯片，支持多种滤波器特性。
12 mA电流消耗，1.0 V电源，输入参考带内噪声低，芯片面积小
软件定义无线电可重构滤波器CMOS模拟基带离散时间跨导器
▸基于占空比控制的离散时间跨导器的可重构滤波器
▸支持多种滤波器响应（Butterworth、Chebyshev、椭圆）
▸宽带宽范围（400 kHz至30 MHz）
Abstract
This paper describes a reconfigurable analog base-
band (ABB) for a software-defined radio (SDR). A wide variety of
filter characteristics needed for SDR can be obtained by a recon-
figurable filter based on a newly developed duty-cycle controlled
discrete-time transconductor. The ABB, implemented in a 90 nm
CMOS process, provides second- and fourth-order Butterworth,
Chebyshev, and elliptic responses with bandwidths from 400 kHz
to 30 MHz. The chip draws only 12 mA and achieves a P
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