Title :
A 0.22-mm2 7.25-mW per-channel audio stereo-DAC with 97-dB DR and 39-dB SNRout
Author :
Colonna, Vittorio ; Annovazzi, Marzia ; Boarin, Gianluigi ; Gandolfi, Gabriele ; Stefani, Fabrizio ; Baschirotto, Andrea
Author_Institution :
STMicroelectronics, Cornaredo, Italy
fDate :
7/1/2005 12:00:00 AM
Abstract :
In the stereo audio DAC here presented, the tradeoff between area-power consumption-SNRout-dynamic range is optimized for the case of a 96-dB audio system. Using a single-opamp switched-capacitor structure for the reconstruction filter, a hybrid FIR/IIR transfer function allows to reject out-of-band noise. This circuit solution strongly reduces area and power consumption. In a 0.13-μm CMOS technology, the stereo DAC achieves a 97-dB dynamic range and a 39-dB SNRout with a 0.22-mm2 area and 7.25-mW power consumption per channel.
Keywords :
CMOS integrated circuits; audio systems; digital-analogue conversion; low-power electronics; sigma-delta modulation; switched capacitor filters; 0.22 mm; 7.25 mW; CMOS technology; FIR/IIR transfer function; audio stereo DAC; audio system optimization; digital-to-analog converters; reconstruction filter; sigma-delta modulation; single-opamp; switched-capacitor filters; Audio systems; CMOS technology; Circuits; Costs; Dynamic range; Energy consumption; Finite impulse response filter; Signal to noise ratio; System-on-a-chip; Transfer functions; Digital-to-analog converters; low power; sigma-delta modulation; switched-capacitor filters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2005.847486
