Multichannel memory-based numerically controlled oscillators

Details Multichannel memory-based numerically controlled oscillators Multichannel memory-based numerically controlled oscillators

2007-06-18

2009-08-04

Chang, Daniel D (Department: 2819)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C327S106000, C326S040000

Reexamination Certificate

active

07570120

ABSTRACT:
A multichannel numerically controlled oscillator is provided. The multichannel numerically controlled oscillator has a dual port memory. An output function generation lookup table in the dual port memory is used to generate output functions for the numerically controlled oscillator. A first channel of output is generated based on a first address signal that is presented on a first port of the dual port memory. A second channel of output is generated based on a second address signal that is presented on a second port of the dual port memory. First and second phase accumulators may be used to produce the address signals for the first and second ports of the dual port memory, respectively. The phase accumulators may each contain a register, an adder, and a feedback path. The registers in the phase accumulators and the dual port memory may handle signals at the clock rate of the output channels.

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patent: 7095349 (2006-08-01), Mauer
patent: 7109808 (2006-09-01), Pelt
patent: 2008/0074311 (2008-03-01), Atherton

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