Methods, systems, and apparatuses for reducing DC bias
AssigneeSTMicroelectronics International N.V.
InventorsAnkur Bal, Vikram Singh
Life of this patent
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Abstract
Various examples in accordance with the present disclosure provide example methods, systems, and apparatuses that may reduce direct current (DC) bias in biased signal inputs. For example, an example system includes a signal operator and an adaptive filter. The signal operator receives a biased signal input. The adaptive filter provides an estimated bias parameter to the signal operator. The signal operator generates an unbiased signal output based at least in part on the biased signal input and the estimated bias parameter.
Claims18
A system comprising:
- a signal operator receiving a biased signal input;
- and
- an adaptive filter providing an estimated bias parameter to the signal operator, the estimated bias parameter indicating an estimated bias component associated with the biased signal input,
- wherein the signal operator generates an unbiased signal output based at least in part on the biased signal input and the estimated bias parameter.
A method comprising:
- receiving a biased signal input;
- generating an estimated bias parameter indicating an estimated DC bias associated with the biased signal input;
- and
- generating an unbiased signal output based at least in part on the biased signal input and the estimated bias parameter.
An analog-to-digital converter (ADC) comprising:
- a sigma-delta modulation system generating a biased signal;
- and
- a DC bias reduction system comprising a signal operator and an adaptive filter, wherein the signal operator receives the biased signal, wherein the adaptive filter provides an estimated bias parameter to the signal operator, wherein the signal operator generates an unbiased signal based at least in part on the biased signal and the estimated bias parameter.
Dependencies are inferred from the claim text.