Low voltage SC TDM correlator for the extraction of time delay

This paper proposes a novel technique for the computation of interaural time delay cues which are useful for sound localization. A switched capacitor implementation is used in order to achieve good accuracy. Furthermore, to reduce the area requirement and minimize the accumulation of offset and noise, a time-division multiplexed approach has been used requiring just three fast op amps, one analogue multiplier and a comparator. These blocks have been optimized to operate at a supply voltage of 1.8 V