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US 2018/0102924 A1Published application
Method of using a dfe as a sigma-delta adc
AssigneeRaytheon Company
InventorsBrian A. Gunn, Russell Duren
Life of this patent
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Abstract
A Decision Feedback Equalizer (DFE) is used as the predictive filter in a Sigma-Delta feedback loop as part of a Sigma-Delta Analog-to-Digital Converter. The tap weights of the DFE are chosen to provide adaptive noise shaping for receiving signals of various frequencies multiplexed in time.
Claims22
A method of processing an analog signal, the method comprising:
- providing a Decision Based Equalizer (DFE) portion having an input and a plurality of gain/delay stages;
- setting a respective gain value for each gain/delay stage to a predetermined gain value;
- providing the analog signal to the DFE input;
- and
- retrieving a digital representation of the filtered analog signal at an output of the DFE.
2 more elements
A method of implementing a Sigma-Delta Analog-to-Digital Converter (ADC) using a Decision Based Equalizer (DFE) portion, wherein the DFE portion comprises an input and a plurality of gain/delay stages, the method comprising:
- setting a respective gain value for each gain/delay stage to a predetermined gain value;
- providing an analog signal to the DFE input;
- and
- retrieving a digital representation of the analog signal at an output of the DFE.
1 more element
Dependencies are inferred from the claim text.