摘要
A low power,highly linear active-RC filter is presented.This filter is synthesized from a low pass 6 order Chebyshev RLC ladder,and exhibits a reconfigurable bandwidth（10 MHz,50 MHz）.In order to meet the high cutoff frequency（50 MHz） and strict adjacent channel rejection requirements,a novel operational amplifier based on a new compensation technique is used,which optimizes high frequency filter performance and minimizes current consumption.This filter is fabricated in a 0.18μm CMOS process,the measurement results indicate that the filter provides 10 MHz and 50 MHz selectable bandwidth,and excellent adjacent channel rejection：-15.3 dB at 12.5 MHz with 10 MHz cutoff frequency,-8.3 dB at 60 MHz with 50 MHz cutoff frequency,three times out-band rejection more than 60 dB while the in-band ripple is less than 1 dB.
A low power,highly linear active-RC filter is presented.This filter is synthesized from a low pass 6 order Chebyshev RLC ladder,and exhibits a reconfigurable bandwidth（10 MHz,50 MHz）.In order to meet the high cutoff frequency（50 MHz） and strict adjacent channel rejection requirements,a novel operational amplifier based on a new compensation technique is used,which optimizes high frequency filter performance and minimizes current consumption.This filter is fabricated in a 0.18μm CMOS process,the measurement results indicate that the filter provides 10 MHz and 50 MHz selectable bandwidth,and excellent adjacent channel rejection：-15.3 dB at 12.5 MHz with 10 MHz cutoff frequency,-8.3 dB at 60 MHz with 50 MHz cutoff frequency,three times out-band rejection more than 60 dB while the in-band ripple is less than 1 dB.
基金
supported by the Major Specialized Program of National Science and Technology of China(Nos.Z11/1100054111004, 2010ZX03007-002-03)
