A class-AB, dual path building block for Gm-C filter that has high linearity and high PSRR is presented. The class-AB action provides good linearity and gm/Id while the dual path approach solves the PSRR problem associated with conventional class-AB OTA. A current-mode 4th order Butterworth filter designed using the proposed building block in 0.13μm CMOS technology provides 54.2dB IM3 and 52dB SNR in 1.3GHz bandwidth while consuming as low as 24mW. It occupies 0.1 mm{sup}2.
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机译：提出了具有高线性度和高PSRR的GM-C过滤器的AB类，双路径构建块。 AB类操作提供良好的线性度和GM / ID，而双路径方法解决了与传统类AB OTA相关的PSRR问题。在0.13μmCMOS技术中使用所提出的构建块设计的电流模式第4阶Butterworth滤波器提供54.2dB的IM3和52DB SNR，在1.3GHz带宽，同时消耗低至24MW。它占用0.1 mm {sup} 2。
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