Title :
A 3.3 V single-poly CMOS audio ADC delta-sigma modulator with 98 dB peak SINAD
Author :
Fogleman, Eric ; Galton, Ian ; Huff, William ; Jensen, Henrik
Author_Institution :
California Univ., San Diego, La Jolla, CA, USA
Abstract :
This paper presents a second-order ΔΣ modulator for audio-band A/D conversion implemented in a 3.3 V, 0.5 μm, single-poly CMOS process that achieves 98 dB peak SINAD and over 100 dB SFDR. The design uses a reduced-complexity, mismatch-shaping 33-level DAC and a 33-level flash ADC with digital common-mode rejection and dynamic element matching of comparator offsets. These signal processing innovations, combined with established circuit techniques, enable state of the art performance in CMOS optimized for digital circuits. To the knowledge of the authors, this level of performance has not been achieved previously under these process constraints
Keywords :
CMOS integrated circuits; analogue-digital conversion; audio equipment; audio signal processing; delta-sigma modulation; switched capacitor networks; 0.5 micron; 3.3 V; ADC delta-sigma modulator; CMOS audio ADC; SINAD; audio-band A/D conversion; comparator offsets; digital common-mode rejection; dynamic element matching; flash ADC; mismatch-shaping DAC; second-order ΔΣ modulator; signal processing; single-poly CMOS process; CMOS digital integrated circuits; CMOS process; Circuit noise; Circuit topology; Delta modulation; Digital circuits; Integrated circuit noise; Parasitic capacitance; Quantization; Switched capacitor circuits;
Conference_Titel :
Custom Integrated Circuits, 1999. Proceedings of the IEEE 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-5443-5
DOI :
10.1109/CICC.1999.777256
