Wideband Signal Analyzer Based on Time-Interleaved ADCs with Digital Calibration

Abstract

This paper presents a novel architecture of wideband signal analyzer based on time-interleaved ADCs. Architecture of signal analyzer include improved method of digital calibration of ADC channels operating in the time-interleaved mode of input signals. This method is based on the least squares method. The advantage of the proposed method is high speed and high accuracy of ADC channels tuning in comparison with the majority of existing methods, which are based on the least squares method. The results of simulation modeling of the proposed method, including spectral analysis of the output signal before and after calibration, are presented. The comparison of the proposed method with existing methods is performed.