Title :
A RC reconstruction filter for a 16-bit audio delta-sigma DAC
Author :
Jin Yang ; Xiaobo Wu ; Jinchen Zhao
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
To build a 16-bit audio delta-sigma (Δ-Σ) digital-to-analog converter (DAC), a low noise reconstruction filter has been presented in this paper. By using the direct charge transfer (DCT) technique, the low noise and small area is implemented. In addition, a fully differential operational amplifier (op-amp) with proposed switch capacitor (SC) common mode feed back (CMFB) circuit is employed for low-noise design in this system. The proposed reconstruction filter is designed in TSMC 0.35μm CMOS process. And a peak signal-to-noise density ratio (SNDR) of 95.3 dB and a dynamic range (DR) of 97.2 dB for a 5k Hz input signal is achieved at a 1.8V supply voltage.
Keywords :
CMOS integrated circuits; audio signal processing; delta-sigma modulation; operational amplifiers; switched capacitor networks; Δ-Σ digital-to-analog converter; RC reconstruction filter; TSMC CMOS process; audio delta-sigma DAC; direct charge transfer technique; fully differential operational amplifier; size 0.35 mum; switch capacitor common mode feedback circuit; word length 16 bit; Capacitors; Choppers (circuits); Clocks; Discrete cosine transforms; Finite impulse response filter; Noise; Power demand; SC CMFB; audio DAC; chopper; direct charge transfer; reconstruction filter;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467729
