An analog non-linear signal conditioning circuit for constant temperature anemometer

The paper proposes a novel non-linear analog signal conditioning circuit for correcting the transfer curves of constant temperature anemometers. The scheme is centered around a dual-input, operational amplifier based logarithmic circuit. Pspice simulation studies have been undertaken using real-life air-flow velocity measurement data. Reasonably good results have been obtained. The proposed scheme can also be used for other transducers with convex-upward transfer characteristics.