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US 7,548,177 B2Granted
Multiple FM dither
AssigneeAgilent Technologies, Inc.
InventorsGeorge Stennis Moore, Brad Elwood Andersen
Life of this patent
Estimating the term…
Abstract
Multiple noise-FM dither. An analog dither signal is generated by summing two or more noise-FM signals, each noise-FM signal being a carrier modulated by a noise source.
Claims18
A dither signal generator comprising:
- a plurality of noise-FM sources, each noise-FM source comprising a carrier generator which is frequency modulated by an independent noise source, and
- a summing node summing the plurality of noise-FM sources to produce a dither.
A method of generating a dither signal comprising:
- generating a plurality of noise-FM signals, each noise-FM signal produced by frequency modulating a carrier with a noise signal, and
- summing the noise-FM signals to produce a dither signal.
A dither signal generator comprising:
- a plurality of noise-FM sources, each noise-FM source comprising a carrier generator which is frequency modulated by an independent noise source and a noise generator feeding a noise shaping and scaling filter;
- and
- a summing node summing the plurality of noise-FM sources to produce a dither.
A method of generating a dither signal comprising:
- generating a plurality of noise-FM signals, each noise-FM signal produced by frequency modulating a carrier with a noise signal, and
- summing the noise-FM signals to produce a dither signal, wherein the noise signal has a Gaussian amplitude distribution.
Dependencies are inferred from the claim text.