Characterizing the Impact of Substrate Noise on High-Speed Flash ADCs
Nikaeen, P.; Murmann, B.; Dutton, R.W.
Quality Electronic Design, 2008. ISQED 2008. 9th International Symposium on
Volume , Issue , 17-19 March 2008 Page(s):396 - 400
Digital Object Identifier   10.1109/ISQED.2008.4479764
Summary:A 4-bit flash ADC is investigated in presence of substrate noise generated by switching activities in digital blocks. The impact of noise is analyzed in different building blocks of the ADC and is measured experimentally using a high-speed ADC test block fabricated in a 0.18-mum SiGe BiCMOS process. Measurement results show that noise spikes in the substrate cause distortion in the prototype ADC and degrade its SNDR by 2 dB (10%) at noise frequencies above 200 MHz.

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