Please use this identifier to cite or link to this item: https://doi.org/10.1109/TCSI.2007.890615
Title: Bandpass sigma-delta modulator employing SAW resonator as loop filter
Authors: Yu, R.
Xu, Y.P. 
Keywords: Analog-to-digital converter (ADC)
Bandpass (BP)
Sigma-delta modulator (ΣΔM)
Surface acoustic wave (SAW) resonator
Issue Date: Apr-2007
Citation: Yu, R., Xu, Y.P. (2007-04). Bandpass sigma-delta modulator employing SAW resonator as loop filter. IEEE Transactions on Circuits and Systems I: Regular Papers 54 (4) : 723-735. ScholarBank@NUS Repository. https://doi.org/10.1109/TCSI.2007.890615
Abstract: Continuous-time bandpass (BP) sigma-delta modulators (ΣΔMs) employing surface acoustic wave (SAW) resonators as loop filters are presented. Compared with the loop filters realized with GmM-C and LC resonators, the SAW resonator has the advantage of high-Q factor, wide resonant frequency range and accurate resonant frequency without the need for automatic tuning. With the proposed anti-resonance cancellation and loop filter phase compensation techniques, a second- and a fourth-order BP ΣΔMs are demonstrated in a 0.35-μm CMOS technology. Both modulators are tested with 47.3-MHz off-chip SAW resonators. The second-order modulator attains a dynamic range of 57 dB and peak signal-to-noise distortion ratio (SNDR) of 54 dB and the fourth-order one achieves a dynamic range of 69 dB and peak SNDR of 66 dB, both in a 200-kHz signal bandwidth. The fourth-order modulator is also measured in a 3.84-MHz signal bandwidth and achieves a dynamic range of 52.5 dB and peak SNDR of 50 dB, an effective 8-bit resolution. © 2007 IEEE.
Source Title: IEEE Transactions on Circuits and Systems I: Regular Papers
URI: http://scholarbank.nus.edu.sg/handle/10635/82004
ISSN: 10577122
DOI: 10.1109/TCSI.2007.890615
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