Dithering module with diplexer
AssigneeMicronetics, Inc.
InventorsLawrence Fletcher, Patrick Robbins
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Abstract
Dithering techniques that efficiently combine a non-correlated noise signal with a desired signal are disclosed. Insertion loss in the noise path is relatively low due to combining means employed. In one embodiment, a self-contained dithering module includes a diplexer (or equivalent device) that provides an insertion loss associated with the noise signal of 3 dB or less. The signal+noise output can be used in noise-based application such as a data conversion process.
Claims25
A method for diplexer-based dithering a desired signal having a frequency band, the method comprising:
- generating a noise signal;
- amplifying the noise signal;
- filtering the amplified noise signal, so as to prevent that noise signal from adversely affecting the frequency band of the desired signal;
- and
- diplexing with a diplexer the filtered noise signal with the desired signal to produce a signal+noise signal.
A method for dithering a desired signal having a frequency band, the method comprising:
- generating a noise signal;
- amplifying the noise signal;
- and
- passively combining the amplified noise signal with the desired signal to produce a signal+noise signal, wherein both the desired signal and the noise signal experience insertion loss of 3 dB or less.
A self-contained dithering device comprising:
- a noise source adapted to generate a noise signal;
- an amplification stage adapted to amplify the noise signal;
- and
- a diplexer adapted to diplex the filtered noise signal with a desired signal to produce a signal+noise signal.
A method for diplexer-based dithering a desired signal having a frequency band, the method comprising:
- diplexing with a diplexer a noise signal with a desired signal to produce a signal+noise signal for use in a data conversion process performed by an analog-to-digital converter.
Dependencies are inferred from the claim text.