THE SECOND ORDER LOW PASS FILTER DESIGN WITH A NOVEL HIGHER PRECISION SQUARE-ROOT CIRCUIT

In this paper a current-mode square-root circuit with reduced short-channel effect is designed and a second order low pass filter is proposed employing the section designed. The circuit proposed is suitable for standard CMOS fabrication and analog systems. The proposed filter circuit has been simulated with SPICE simulator using 0.35 μm CMOS technology parameters. It is observed that it decreases total harmonic distortion THD compared to classical filter employing stack-MOS current- mode square-root circuit.