Title :
A 0.22mm2 7.25mW per-channel audio stereo-DAC with 97dB-DR and 39dB SNRout
Author :
Colonna, V. ; Annovazzi, M. ; Boarin, G. ; Gandolfi, G. ; Stefani, F. ; Baschirotto, A.
Author_Institution :
STMicroelectron., Cornaredo, Italy
Abstract :
In the stereo audio DAC presented here, the trade-off between area-power consumption-SNRout-dynamic range is optimized for the case of a 96 dB audio system. Using a single-op amp switched capacitor structure for the reconstruction filter, a hybrid FIR/IIR transfer function allows it 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; FIR filters; IIR filters; audio equipment; audio signal processing; digital-analogue conversion; operational amplifiers; signal reconstruction; switched capacitor filters; 0.13 micron; 7.25 mW; 96 dB; CMOS; area-power consumption-SNRout-dynamic range tradeoff; audio stereo-DAC; dynamic range; hybrid FIR/IIR transfer function; out-of-band noise rejection; single-op amp switched capacitor structure; switched capacitor reconstruction filter; Audio systems; CMOS technology; Circuit noise; Costs; Energy consumption; Filters; Power generation; Signal to noise ratio; Transfer functions; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2004. ESSCIRC 2004. Proceeding of the 30th European
Print_ISBN :
0-7803-8480-6
DOI :
10.1109/ESSCIR.2004.1356641
