Patent ID: 8957798
Filing Date: 2015-02-17
Classification: H03M

Abstract:
1. An artifact-corrected time-interleaved analog-to-digital converter (TI-ADC) comprising: a bandpass signal s(t) input; s(t) having a spectrum with a first clear region proximate DC and a second clear region proximate fmax, where fmax is the upper frequency limit of the spectrum; a tone inserter that injects a probe tone into signal s(t) proximate DC so as to generate a tone injected signal x(t); a TI-ADC that digitizes x(t) to generate a digitized tone injected signal x(n); an error estimator that calculates a signal artifact estimate ê(n) based upon x(n) proximate fmax; and at least one subtractor that removes ê(n) and the probe tone from x(n) so as to generate an artifact-corrected signal output ŝ(n).