Title :
Single Amplifier Sigma Delta Modulator With Input Feedforward
Author :
Yuan, Xiaolong ; Signell, Svante ; Wu, Xiaobo
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
It has recently become very popular to feedforward the input signal in wideband delta-sigma modulators, so that the integrators only process quantization errors. The advantage is that the actual signal is not distorted by op-amp and integrator nonlinearities. The paper applies this technique to single amplifier based sigma delta modulator in both analog and digital way. Their characteristic has been analyzed and simulation results are given which show the improved performance
Keywords :
modulators; operational amplifiers; quantisation (signal); sigma-delta modulation; input feedforward; integrator nonlinearities; op-amp; quantization errors; sigma delta modulator; single amplifier; wideband delta-sigma modulators; Broadband amplifiers; Delta modulation; Delta-sigma modulation; Digital modulation; Distortion; Operational amplifiers; Performance analysis; Quantization; Signal processing; Wideband;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342122
