A comparison of three parallel /spl Delta//spl Sigma/ A/D converters

One way to increase the conversion bandwidth of the Delta-Sigma (/spl Delta//spl Sigma/) A/D converter is to use parallelism. The three main types of parallel /spl Delta//spl Sigma/ A/D converter which are practical for implementation are the time-interleaved, the parallel /spl Delta//spl Sigma/ (/spl Pi//spl Delta//spl Sigma/), and the frequency band decomposition A/D converters. In this paper, it is shown that the operation of all three approaches can be explained using the same underlying theory. This common structure is then used to explore the design tradeoffs among these architectures.