Title :
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
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;
Conference_Titel :
ASIC, 2001. Proceedings. 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-6677-8
DOI :
10.1109/ICASIC.2001.982542
