Patent ID: 6690748
Filing Date: 2004-02-10
Classification: H03M,H04L

Abstract:
A receiver comprising:an intermediate to base band converter including: a first delta sigma sampler for receiving a first intermediate frequency signal, and in response thereto outputting a first sequence of samples at a first rate, wherein the first delta sigma sampler is characterized by a low pass transfer function; a first decimator coupled to the first delta sigma sampler for receiving the first series of samples at the first rate and outputting a second series of samples at a second rate that is less than the first rate; a first digital mixer coupled to the first decimator for receiving the second series of samples and multiplying successive subsets of the second series of samples by a first set of function values and outputting a first series of products; a second decimator coupled to the first digital mixer for receiving a third series of samples derived from the first series of products, and outputting a fourth series of samples at a third rate that is less than the second rate; and a radio frequency to intermediate frequency demodulator for receiving a radio frequency signal that includes a base band signal that is characterized by a bandwidth, and outputting an intermediate frequency signal that is characterized by an intermediate frequency that is less than about four times the bandwidth.