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 |
Appears in Collections: | Staff Publications |
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