Patent ID: 7324030
Filing Date: 2008-01-29
Classification: H03L,H03M

Abstract:
1. A delta sigma modulator for use with a delta sigma frequency synthesizer, the modulator comprising: a first group of accumulators; a second group of accumulators; a recombiner producing an output of said modulator; and a bit stream generator, wherein each group of accumulators comprises a plurality of accumulators coupled to one another; said second group of accumulators receives an input representing a fractional portion of divider division ratio used by said delta sigma frequency synthesizer; said first group of accumulators receives input from said second group of accumulators; at least one accumulator in said second group of accumulators receives an input from said bit stream generator; said recombiner receives input from said first group of accumulators; and both of said first and second groups of accumulators are synchronously clocked.