Title :
A simple global resonation strategy for wideband discrete-time MASH ΣΔ modulators
Author :
Khazaeili, Beheshte ; Yavari, Mohammad
Author_Institution :
Dept. of Electr. Eng., Amirkabir Univ. of Technol., Tehran, Iran
Abstract :
A novel strategy of zero optimization in cascaded ΣΔ modulators is presented. In the proposed structure, by using just an analog inter-stage feedback path, one pair of the noise transfer function (NTF) zeros is distributed over the desired bandwidth so that the in-band quantization noise is reduced. The effectiveness of the proposed modulator is verified by analytical calculations and simulation results.
Keywords :
sigma-delta modulation; transfer functions; cascaded signma-delta modulators; global resonation strategy; multistage noise shaping modulators; noise transfer function zeros; wideband discrete-time MASH sigma-delta modulators; Digital filters; Gain; Modulation; Multi-stage noise shaping; Noise; Optimization; Quantization (signal); MASH ΣΔ modulators; global resonation; local resonation; zero optimization;
Conference_Titel :
Electrical Engineering (ICEE), 2014 22nd Iranian Conference on
Conference_Location :
Tehran
DOI :
10.1109/IranianCEE.2014.6999559
