a two - channel time - interleaved analog - to - digital converter for communication signals offers a significant increase in the available sample rate of adcs . its performance is degraded by timing and gain mismatches . both timing and gain mismatches are corrected in the digital data section of a two - channel ti - adc for band - pass input signals . this is a realistic communications system scenario as modern system designs lean towards having the adc interface with intermediate frequency signal in the analog section of a digital receiver rather than in the dc centered , analog down converted , in - phase and quadrature pair .