Spatial averaging and ordering in matched element arrays

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.