The dynamic range of second-order continuous-time active filters

Abstract

Analysis of both the output noise and the large-signal harmonic distortion in terms of block diagrams allows the total dynamic range of active filters to be predicted theoretically. This leads to optimization and comparison of single and multiple-amplifier RC and OTA-C second-order bandpass filter circuits. The results are confirmed experimentally throughout. Increased design frequency or selectivity reduces dynamic range which is also often related to active sensitivity. Available OTA-C circuits appear to pay for their higher-frequency performance in terms of more restricted signal-handling capability.