Abstract: Described herein is a mismatch shaping technique applied in digital-to-analog converters (DACs) for high pass filtering mismatch related errors. The mismatch shaping scheme is based on a zero mean error encoding technique, which can be applied directly to binary coded signals, without the use for binary to thermometer decoding and element shuffling. In at least one example, an apparatus is provided which comprises a mismatch shaping circuitry to receive an N-bit binary input bits and to generate an (N+1)-bit digital output. In at least one example, the apparatus further comprises a digital-to-analog converter to receive the (N+1)-bit digital output and to generate an analog output, wherein the mismatch shaping circuitry is to encode the (N+1)-bit digital output to shape mismatch errors in the digital-to-analog converter.

Abstract: This disclosure provides systems, methods, and apparatus related to a the design of arrays of electrodes in a device which includes a light-guiding layer in optical contact with the electrodes. In one aspect, a device includes an array of electrodes, the electrodes include at least one edge having a non-linear shape. Specific design constraints may be placed on the shape of the non-linear edge of the electrodes.