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US 11,600,280 B2Granted
Analog-to-digital converter and method
AssigneeCirrus Logic, Inc.
InventorJohn P. Lesso
Life of this patent
Estimating the term…
Abstract
An analogue-to-digital converter (ADC), comprising: an adaptive whitening filter configured to filter an analogue input signal and output a whitened analogue input signal; a first converter configured to receive said whitened analogue input signal and output a whitened digital signal; a controller configured to adapt the whitening filter based on the received analogue input signal.
Claims22
An analogue-to-digital converter (ADC), comprising:
- an adaptive whitening filter configured to filter an analogue input signal and output a whitened analogue input signal;
- a first converter configured to receive said whitened analogue input signal and output a whitened digital signal;
- an adaptive de-whitening filter configured to filter the whitened digital signal and output a de-whitened digital output signal, the de-whitening filter being substantially inverse to the whitening filter;
- and
- a controller configured to adapt the whitening filter and the de-whitening filter based on the analogue input signal.
2 more elements
A method of analogue-to-digital conversion, comprising:
- whitening an analogue input signal with a whitening filter to generate a whitened analogue input signal;
- converting the whitened analogue input signal with a first converter to generate a whitened digital signal;
- and
- filtering the whitened digital signal and outputting a de-whitened digital output signal, with an adaptive de-whitening filter, the de-whitening filter being substantially inverse to the whitening filter;
- and
- adapting the whitening filter and the de-whitening filter based on the analogue input signal.
3 more elements
The method of 11, further comprising adapting the first converter based on the analogue input signal and the de-whitened digital output signal.
Dependencies are inferred from the claim text.