Sigma delta analog to digital converter
AssigneeNXP B.V.
InventorXavier Albinet
Life of this patent
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Abstract
A Sigma-Delta analog to digital converter (ADC) is described. The Sigma-Delta ADC includes a series arrangement of a gain tracker, a first discrete-time integrator stage and a quantizer between an ADC input and an ADC output. The Sigma-Delta ADC includes a digital to analog converter (DAC) having a DAC input and a DAC output connected to the gain tracker. The Sigma-Delta analog to digital converter includes a controller having a control input connected to the quantizer output. The controller provides a digital input to the DAC input and provides a gain control signal to the gain tracker.
Claims15
A Sigma-Delta analog to digital converter, ADC, comprising:
- a series arrangement of a first differentiator stage comprising a gain tracker, a first discrete-time integrator stage and a quantizer between an ADC input and an ADC output;
- a digital to analog converter, DAC, having a DAC input and a DAC output connected to the gain tracker;
- and
- a controller having a control input coupled to the quantizer output;
- wherein the controller is configured to provide a digital input to the DAC input and to provide a gain control signal to the gain tracker and wherein the gain tracker is configured to apply a gain determined by the gain control output to a signal corresponding to a difference between a received signal on the analog input and the quantizer output.
Dependencies are inferred from the claim text.