研制了一款可编程6阶巴特沃斯有源RC滤波器。为提高滤波器中运算放大器的增益带宽积,设计了一种新型的前馈补偿运算放大器。为消除工艺偏差和环境变化对截止频率的影响,设计了一种片上数字控制频率调谐电路,并采用TSMC 0.18μm CMOS工...研制了一款可编程6阶巴特沃斯有源RC滤波器。为提高滤波器中运算放大器的增益带宽积,设计了一种新型的前馈补偿运算放大器。为消除工艺偏差和环境变化对截止频率的影响,设计了一种片上数字控制频率调谐电路,并采用TSMC 0.18μm CMOS工艺进行了流片。滤波器采用低通滤波结构,测试结果表明,3 d B截止频率为1 32 MHz,步进1 MHz,带内增益0 d B,带内纹波0.8 d B,2倍带宽处带外抑制不小于24 d Bc,5倍带宽处带外抑制不小于68 d Bc,滤波器等效输入噪声为槡340 n V/Hz@1 MHz,调谐误差为±3%。滤波器裸芯片面积0.87 mm×1.05 mm。采用1.8 V电源电压,滤波器整体功耗小于20 m W。展开更多
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...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.展开更多
文摘研制了一款可编程6阶巴特沃斯有源RC滤波器。为提高滤波器中运算放大器的增益带宽积,设计了一种新型的前馈补偿运算放大器。为消除工艺偏差和环境变化对截止频率的影响,设计了一种片上数字控制频率调谐电路,并采用TSMC 0.18μm CMOS工艺进行了流片。滤波器采用低通滤波结构,测试结果表明,3 d B截止频率为1 32 MHz,步进1 MHz,带内增益0 d B,带内纹波0.8 d B,2倍带宽处带外抑制不小于24 d Bc,5倍带宽处带外抑制不小于68 d Bc,滤波器等效输入噪声为槡340 n V/Hz@1 MHz,调谐误差为±3%。滤波器裸芯片面积0.87 mm×1.05 mm。采用1.8 V电源电压,滤波器整体功耗小于20 m W。
基金Project supported by the National Science and Technology Major Projects of China(No.2012ZX03004007)the National Natural Science Foundation of China(Nos.61020106006,61076029)
文摘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.
