In the mid 1980’s, DSP processors moved many of the traditional analog functions (i.e. filters, modulators, demodulators, etc) into the digital domain. This was done primarily to make creating complex functions much easier and allowing designers to realize non-linear functions previously difficult to create in analog functions. Power was not a primary concern when moving to the digital domain, however today in mobile devices which run on finite power sources, DSP cycles are expensive. A new technology called Analog to Information or A-to-I is emerging that moves some of the traditional DSP processing back to the analog domain.