An eight-channel analog signal processor for VoP applications

Author

Zhang, Liang ; Yan, Gang ; Liu, Xin ; Wang, Jian ; Zhai, Shubing ; Shan, Gang ; Gao, Song ; Liu, Haichuan ; Chang, Zhongyuan ; Yang, Howard C.

Author_Institution

IDT-Newave Technol. Co. Ltd., Shanghai, China

fYear

2001

fDate

2001

Firstpage

240

Lastpage

243

Abstract

In this paper we present the first single-chip 8-channel voice codec with enhanced features for voice over packet (VoP) and high density line card applications. Sigma-delta modulators are used for A/D and D/A conversions and a RISC/DSP core is employed for processing the digitized voice signals. The mixed signal chip is implemented in TMDP 0.6 um CMOS technology. The measured results show that all performance parameters meet ITU-T Recommendations G.712 requirements

Keywords

CMOS analogue integrated circuits; analogue processing circuits; speech codecs; 0.6 micron; A/D conversion; CMOS technology; D/A conversion; RISC/DSP core; VoP applications; eight-channel analog signal processor; high-density line card; mixed-signal single chip; sigma-delta modulator; voice codec; Attenuation; CMOS technology; Circuit simulation; Codecs; Digital filters; Digital signal processing; Digital signal processing chips; Finite impulse response filter; Impedance matching; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2001. Proceedings. 4th International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-6677-8

Type

conf

DOI

10.1109/ICASIC.2001.982542

Filename

982542