适用于宽带多模射频芯片的可重构滤波器

A Reconfigurable Filter Suitable For Wideband Multimode RF Transceiver Chips

论文提出了一种适用于宽带多模式射频芯片的可重构滤波器,通过重构可以实现低通滤波和复数带通滤波的功能。论文基于SMIC 55 nm RFCMOS工艺设计了一个三阶切比雪夫级联可重构滤波器,其频率自动校准电路采用数字方式实现;低通滤波模式下,带宽范围为1 MHz到30 MHz,增益范围为0 dB到29 dB;复数带通滤波模式下,中心频率范围为2 MHz到20 MHz,带宽为1 MHz到30 MHz,增益为0dB到29 dB。整个电路工作电压为1.2 V,滤波器静态功耗仅为3.8 mA,调谐电路静态电流为0.2 mA。

The paper presents an active-RC reconfigurable filter suitable for wideband multimode RF transceiver chips.Through reconstruction the filter can realize the function of low-pass filter and complex filter.Based on SMIC 55nm RFCMOS process,a 3 order Chebyshev cascade reconfigurable filter with digital automatic frequency calibration circuit is presented.In low-pass filtering mode,bandwidth ranges from 1MHz to 30MHz and gain ranges from 0dB to 29dB;in complex filtering mode,center frequency ranges from 2MHz to 20MHz,bandwidth is 1MHz to 30 MHz,gain is 0dB to 29dB.The working voltage of the whole circuit is 1.2V,static power consumption of the filter is only 3.8mA and frequency-calibration circuit is 0.2mA.