Removing electrical noise in systems with ADCs

Details Removing electrical noise in systems with ADCs Removing electrical noise in systems with ADCs

2006-06-26

2008-09-09

Barbee, Manuel L (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S179000, C708S322000

Reexamination Certificate

active

07424407

ABSTRACT:
Signal processing systems and methods are described that include a multi-analog receiver front end with adaptive filtering. The multi-analog receiver front end uses two or more analog-to-digital converters (ADCs) to remove additive electrical noise present in the analog front end. The multiple ADCs are followed in the signal processing path by digital statistical signal processing. The multi-analog receiver front end adaptively determines the passband of a digital filter in a system with input signals having a wide frequency range of interest, and controls filtering of the input signals to the narrow frequency range that includes an input signal. The multi-analog receiver front end, through removal of additive noise, provides higher signal-to-noise ratios for a given power dissipation and chip area when compared to receiver front ends which do not use the multiple ADCs.

REFERENCES:
patent: 5590104 (1996-12-01), Britton
patent: 5632272 (1997-05-01), Diab et al.
patent: 6278726 (2001-08-01), Mesecher et al.

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