Danyu Wu, Fan Jiang, Lei Zhou, Jin Wu, Yinkun Huang, Zhi Jin, Xinyu Liu
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A 4GS/s 8bit ADC fabricated in 0.35µm SiGe BiCMOS technology
In this paper, a low cost 4GS/s 8bit Folding-and-Interpolation (F&I) ADC has been demonstrated. To avoid threshold-mismatch and delay-mismatch between coarse and fine quantizer, a novel coarse quantizer with analog pre-processing circuits are proposed. According to the measurement result, the proposed coarse quantizer has successfully eliminated the glitch code. The ADC is capable of sampling analog input frequencies up to 1.5GHz with greater than 7.0 effective number of bits (ENOB) performance. The ADC has a die size of 3.8×3.8 mm2 and consumes 4.1W of power.
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