Title :
Spectral spurs due to quantization in Nyquist ADCs
Author :
Pan, Hui ; Abidi, Asad A.
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA
Abstract :
This paper presents intuitive yet quantitative insights into the harmonics of analog-to-digital converter (ADC) output spectra. It derives the spectral signatures associated with imperfections in practical ADCs. This understanding leads to remedies based on architecture and time-averaging, which are combined to propose a calibration-free pipeline CMOS ADC that simulations show is capable of better than 100-dB spurious-free dynamic range in the presence of real-life imperfections.
Keywords :
harmonic analysis; quantisation (signal); spectral analysis; ADC output spectra; IF demodulation; IF sampling; Nyquist ADC; analog-to-digital converter; calibration-free pipeline CMOS ADC; dither; dynamic element matching; harmonics; quantization spectra; spectral signatures; spectral spurs; spurious-free dynamic range; Analog-digital conversion; Calibration; Circuit simulation; Digital signal processing; Dynamic range; Laboratories; Pipelines; Quantization; Signal sampling; Wideband; Analog-to-digital converter; DEM; IF sampling/demodulation; SFDR; dither; dynamic element matching; spectra of quantization; spurious-free dynamic range;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2004.832755
