Patent ID: 6583741
Filing Date: 2003-06-24
Classification: H03M

Abstract:
A method for configuring a digital correction unit for an analog to digital (A/D) converter during operation of the A/D converter on received input signals, the method comprising:receiving an input signal of interest; performing an analog low pass filter operation on the received input signal of interest; operating the A/D converter on the received input signal of interest after said performing the analog low pass filter operation, wherein said operating produces output samples; configuring the digital correction unit with various different sets of correction values during said operating; in response to being configured with each of the various different sets of correction values, the digital correction unit operating to correct the output samples based on that one of the various different sets of correction values; performing a digital high pass filter operation on corrected output samples of the A/D converter; examining said corrected output samples of the A/D converter after said performing the digital high pass filter operation; selecting one of said sets of correction values in response to said examining; and configuring the digital correction unit with the selected one of said sets of correction values; wherein the digital correction unit is useable in correcting for linearity errors in the A/D converter.