Spatial averaging and ordering in matched element arrays

Abstract

Spatial gradients often limit the matching accuracy of element arrays in ADC's and DAC's. We cast. the problem of spatial gradients formally and present a global optimization-based solution that does not require the gradients to be pre-characterized precisely or limit them to being linear and/or quadratic. Si results from a standalone BiCMOS DAC and a CMOS DAC, part of the industry's first DOCSIS 1.1 certified cable modem solution, are presented.