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Title: A Third-Order Four-Bit Delta-Sigma Modulator with MCIFF Structure for Wideband Applications
Authors: 國立臺灣師範大學電機工程學系
Chien-Hung Kuo
Chien-Yu Chen
Issue Date: 20-Aug-2008
Abstract: This paper presents a third-order low-distortion multi-bit delta-sigma modulator for wideband applications. The modified cascade integrators with distributed feedforward (MCIFF) structure without summer in front of quantizer is realized to save the power consumption in the presented modulator. The impact of the nonlinearity of opamp on the presented multi-bit MCIFF modulator is discussed. The prototype circuit is realized in the third-order 4-bit ΔΣ modulator, which has been fabricated in 0.18μm 1P6M CMOS process. The simulated signal-to-noise plus distortion ratio (SNDR) of the modulator within a 200 kHz of bandwidth under a 13.76 MHz of clock rate is 100.53 dB. The total power consumption of the modulator is 5.03 mW at a 1.8 V of supply voltage.
Other Identifiers: ntnulib_tp_E0610_02_007
Appears in Collections:教師著作

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