Abstract
The performance of high-speed and high-resolution in data acquisition systems to capture a complex transient signal is limited by electronic material and technological level, which has been a key challenge in the improvement of entire sampling characteristics. To solve the core problem of high-performance acquisition systems, a novel hybrid architecture is proposed in this paper, aiming at capturing the ultra-fast and high-accuracy signals. Based on the generalized structure, a behavior model is established for mathematical analysis. Furthermore, a deep insight on the channel mismatch is taken in the proposed structure, since mismatch error is inevitable under parallel architecture in any case. Moreover, the mismatch manifestation is analyzed in both time and frequency domain, and their explicit formulas are derived. It finally shows that ENOB of the proposed system is improved with 1.01-bit by using the hybrid architecture in 4-channel parallelized mode. The simulation results suggest the excellent performance and limitations of the proposed architecture, which paves the way for extending research.
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