A highly-parallel mismatch tolerant photonic A/D converter

Summary form only given. Interleaving is a common approach applied to high-speed photonic A/D conversion which reduces the wide-bandwidth input signal to one which can be converted using conventional highspeed A/D converters. The high-speed sampled input is interleaved to N individual channels with each channel operating at 1/N of the sampling rate. These channelization techniques are known to suffer from performance degradations due to channel-to-channel mismatch. Oversampling A/D converters based on /spl utri//spl Sigma/ or error diffusion modulators incorporate low-resolution A/D converters within a feedback architecture to reduce the quantization noise within the signal baseband through spectral noise shaping. We present a typical power spectrum of the output data sequence for a 2nd-order /spl utri//spl Sigma/-modulator.