Title :
A low-distortion two-path fourth-order bandpass delta-sigma modulator using horizontal opamp sharing
Author :
Waki, Naoya ; Sato, Hiroki ; Hyogo, Akira ; Sekine, Keitaro
Author_Institution :
Tokyo Univ. of Sci., Noda
Abstract :
In this paper, a low-distortion two-path fourth-order bandpass DeltaSigma modulator which has only two opamps is proposed. The proposed modulator is based on both horizontal opamp sharing technique and feedforward topology. It achieves SNDR(signal-to-noise plus distortion ratio) of 80.14 dB and DR (dynamic range) of 82 dB over 200 kHz signal bandwidth centered at 10.03 MHz.
Keywords :
HF amplifiers; delta-sigma modulation; network topology; operational amplifiers; dynamic range; feedforward topology; horizontal opamp sharing; horizontal opamp sharing technique; low-distortion two-path fourth-order bandpass delta-sigma modulator; operational amplifiers; signal-to-noise plus distortion ratio; Analog-digital conversion; Bandwidth; Delta modulation; Distortion; Power harmonic filters; Signal generators; Signal resolution; Topology; Transfer functions; Wireless communication;
Conference_Titel :
Circuits and Systems, 2007. MWSCAS 2007. 50th Midwest Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
978-1-4244-1175-7
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2007.4488804
