Patent ID: 6141389
Filing Date: 2000-10-31
Classification: H04L

Abstract:
A digital tuner comprising:a latch for receiving a plurality of digital words during each of succession of temporal intervals, wherein said digital words received over said succession of temporal intervals define a complex baseband digital communication signal modulated to convey data at a predetermined baud;a multiplexing section having an input coupled to said latch to receive said plurality of digital words at a predetermined rate and having an output, said output providing said digital words and said digital words negated;a digital-to-analog (D/A) converter having an input coupled to said output of said multiplexing section; anda control section coupled to said multiplexing section so that, during said intervals, said plurality of digital words is routed through said multiplexing section to said D/A converter interspersed with said negated digital words so as to effect a multiplication of said digital words by a complex clock signal having an oscillation rate greater than said predetermined rate, said multiplication effected by said control and multiplexing sections up-converting said complex baseband digital communication signal to a frequency band in the range of 150 MHz to 600 MHz.