Patent ID: 8537044

Claim:
An interleaved analog to digital converter with digital equalization, comprising: A. a conversion-measurement-equalization unit having: i. an analog input, that is used as analog input of the interleaved analog to digital converter with digital equalization, a digital output, that is used as digital output of the interleaved analog to digital converter with digital equalization, ii. a measured frequency responses output, a corrected frequency responses input and iii. an equalizer coefficients output, said conversion-measurement-equalization unit being able to work in a calibration mode or an operational mode, wherein in the operational mode the conversion-measurement-equalization unit converts the input analog signal into a digital signal by the use of a interleaved composite ADC consisting of N sub-ADCs, corrects sub-ADCs misalignment as well as the deviations from target frequency responses by the use of a digital equalizer and puts equalizer output signal at the digital output of the conversion-measurement-equalization unit, whereas in the calibration mode said conversion-measurement-equalization unit performs frequency responses measurement of each sub-ADC and yields the measurement results on the measured frequency responses output, transforms the corrected frequency responses received at its corrected frequency responses input into a set of equalizer coefficients, puts them at the equalizer coefficients output and loads the coefficients into digital equalizer memory; B. a residual distortions reduction unit having: i. a measured frequency responses input connected to the measured frequency responses output of the conversion-measurement-equalization unit, ii. an equalizer coefficients input connected to the equalizer coefficients output of the conversion-measurement-equalization unit and iii. a corrected frequency responses output connected to the corrected frequency responses input of the conversion-measurement-equalization unit, wherein said residual distortions reduction unit uses received measured frequency responses and equalizer coefficients as a base to calculate the corrected frequency responses, the calculations being performed as a set of successive iterations.