Title :
Simulation of multi-bit digital delta-sigma modulator
Author :
Yang, Wen-Rong ; Cheng, Yuan-Yuan ; Wang, Jiong-ming
Author_Institution :
Key Lab. of Adv. Display & Syst. Applic., Shanghai Univ., Shanghai
Abstract :
The paper describes a four-order delta-sigma modulation (DSM) with 15 levels quantizer which is used in a 24-bit 44.1-kHz sample-rate audio digital-to-analog converter (DAC). An odd level quantizer has been chosen instead of an even level to reduce quantization noise. The noise transfer function (NTF) is designed to have the zeros optimally in order to increase DR. The peak SNR of the DSM is about 130 dB, which is enough for an audio DAC designed with a 0.35 um CMOS technology.
Keywords :
CMOS integrated circuits; audio signal processing; delta-sigma modulation; signal sampling; CMOS technology; four-order delta-sigma modulation; multibit digital delta-sigma modulator; noise transfer function; sample-rate audio digital-to-analog converter; size 0.35 mum; word length 24 bit; CMOS technology; Circuit noise; Delta-sigma modulation; Digital-analog conversion; Filters; Frequency; Noise reduction; Quantization; Signal to noise ratio; Transfer functions;
Conference_Titel :
Electronic Packaging Technology & High Density Packaging, 2008. ICEPT-HDP 2008. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-2739-0
Electronic_ISBN :
978-1-4244-2740-6
DOI :
10.1109/ICEPT.2008.4607001
