A/D Converter Fundamentals And Trends

2017 IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC)(2017)

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摘要
• Quantization is a search process ranging from the most efficient serial binary search to the fastest brute-force parallel search. • Parallel search is reduced in complexity by signal folding but at the cost of delicate analog signal processing (e.g. MDAC). • Serial binary search combined with comparator reuse results in the most efficient • SAR ADCs at the expense of conversion rate. • SAR ADC speed can be increased by time-interleaving as many quantizers as needed, with the mismatch error digitally calibrated. • Digital calibration and error correction overheads diminish in advanced CMOS processes, leading to SAR ADC popularity. • SAR ADC is sub-ranged for resolution and pipelined for speed, while the switching scheme is optimized for power efficiency.
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关键词
A/D converter,full band capture,software-defined radio,DSP based wireline receivers,coherent optical receivers,discrete Fourier transformation,periodical signals coherent sampling,quantization,error characteristics,error waveform,quantized sinewave spectrum,sampling rate multiplication,conversion rate multiplication,hierarchical parallel A/D conversion,pipelined A/D conversion,noise shaping,noise transfer functions,signal transfer functions
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