A 100-MHz bandpass sigma-delta modulator with a 75-dB dynamic range for IF receivers

A fourth-order switched-capacitor bandpass capital sigma Delta modulator is presented for digital intermediate-frequency (IF) receivers. The circuit operates at a sampling frequency of 100 MHz. The transfer function of the resonator considering nonidealities of the operational amplifier is proposed...

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Veröffentlicht in:	Journal of semiconductors 2011-02, Vol.32 (2), p.025001-1-6
Hauptverfasser:	Yuan, Yudan (宇丹袁), Li, Li (立李), Chang, Hong (虹常), Guo, Yawei (亚炜郭), Cheng, Xu (旭程), Zeng, Xiaoyang (晓洋曾)
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Sprache:	eng
Schlagworte:	Bandpass Dynamic range Intermediate frequency Modulators Receivers Sampling Semiconductors Signal to noise ratio
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creator	Yuan, Yudan (宇丹袁) Li, Li (立李) Chang, Hong (虹常) Guo, Yawei (亚炜郭) Cheng, Xu (旭程) Zeng, Xiaoyang (晓洋曾)
description	A fourth-order switched-capacitor bandpass capital sigma Delta modulator is presented for digital intermediate-frequency (IF) receivers. The circuit operates at a sampling frequency of 100 MHz. The transfer function of the resonator considering nonidealities of the operational amplifier is proposed so as to optimize the performance of resonators. The modulator is implemented in a 0.13- mu m standard CMOS process. The measurement shows that the signal-to-noise-and-distortion ratio and dynamic range achieve 68 dB and 75 dB, respectively, over a bandwidth of 200 kHz centered at 25 MHz, and the power dissipation is 8.2 mW at a 1.2 V supply.
doi_str_mv	10.1088/1674-4926/32/2/025001
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The circuit operates at a sampling frequency of 100 MHz. The transfer function of the resonator considering nonidealities of the operational amplifier is proposed so as to optimize the performance of resonators. The modulator is implemented in a 0.13- mu m standard CMOS process. 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subjects	Bandpass Dynamic range Intermediate frequency Modulators Receivers Sampling Semiconductors Signal to noise ratio
title	A 100-MHz bandpass sigma-delta modulator with a 75-dB dynamic range for IF receivers
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