Title :
A 5 V single-chip delta-sigma audio A/D converter with 111 dB dynamic-range
Author :
Fujimori, Ichiro ; Koyama, Kazuo ; Trager, David ; Tam, Fred ; Longo, Lorenzo
Author_Institution :
Asahi-Kasei Microsyst., Kanagawa, Japan
Abstract :
A 5 V, 24 bit audio delta-sigma A/D converter has been developed. The single chip integrates stereo delta-sigma modulators, voltage reference and decimation filter. A 4th-order cascaded delta-sigma with use of local feedback was employed to improve noise performance. A new multi-stage merged comb filter was used for reduction of digital noise. The 25.8 mm2 chip was fabricated in 0.7 μm CMOS. Measured results show 111 dB dynamic-range and 102 dB peak S/N+D
Keywords :
CMOS integrated circuits; audio equipment; circuit feedback; integrated circuit noise; sigma-delta modulation; 0.7 micron; 24 bit; 5 V; CMOS IC; audio A/D converter; decimation filter; delta-sigma audio ADC; digital noise reduction; dynamic -range; local feedback; multi-stage merged comb filter; noise performance; single-chip ADC; stereo delta-sigma modulators; voltage reference; Circuit noise; Costs; Delta modulation; Feedback; Filters; Noise reduction; Noise shaping; Quantization; Stability; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 1996., Proceedings of the IEEE 1996
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3117-6
DOI :
10.1109/CICC.1996.510587
