题目/Title：一种用于无线接收机的噪声整形可重构复数带通/低通滤波器的设计
                        A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers

作者/Author：刘琼冰,俞小宝,张俊峰,续阳,池保勇
                        Qiongbing Liu,Yu Xiaobao,Junfeng Zhang,Yang Xu,Baoyong Chi

期刊/Journal：半导体学报 Journal of Semiconductors

年份/Issue Date：2014.Sept.

卷（期）及页码/Volume（No.）&pages：Vol.35, No.9, pp. 095003-6

摘要/Abstract：
文章提出了一种用于无线接收机的噪声整形可重构复数带通/低通滤波器。它可配置为500kHz、1MHz或4MHz带宽的低通滤波器，也可配置为3MHz中频，1MHz、2MHz或8MHz带宽的复带通滤波器。该滤波器中的运算放大器以阵列的形式实现，以达到不同工作模式下功耗可变的目的。此外，该滤波器还可配置为一阶、二阶或三阶模式，以获得灵活的滤波特性。文中引入了噪声整形技术来抑制闪烁噪声。该滤波器采用180nm CMOS工艺设计，在三阶8MHz带宽复带通模式下消耗低于3mA电流。采用噪声整形技术，滤波器在100Hz处
A reconfigurable complex band-pass (CBP)/low-pass (LP) active-RC filter with a noise-shaping technique for wireless receivers is presented. Its bandwidth is reconfigurable among 500 kHz, 1 MHz and 4 MHz in LP mode and 1 MHz, 2 MHz and 8 MHz in CBP mode with 3 MHz center frequency. The Op-Amps used in the filter are realized in cell arrays in order to obtain scalable power consumption among the different operation modes. Furthermore, the filter can be configured into the 1st order, 2nd order or 3rd order mode, thus achieving a flexible filtering property. The noise-shaping technique is introduced to suppress the flicker noise contribution. The filter has been implemented in 180 nm CMOS and consumes less than 3 mA in the 3rd 8 MHz-bandwidth CBP mode. The spot noise at 100 Hz can be reduced by 14.4 dB at most with the introduced noise-shaping technique.