Title :
A 1-V 90dB DR audio stereo DAC with embedding headphone driver
Author :
Wong, Kim-Fai ; Lei, Ka-Ian ; U, Seng-Pan ; Martins, R.P.
Author_Institution :
Analog & Mixed-Signal VLSI Lab., Univ. of Macau, Macau
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
This paper presents a 1V 3rd order SigmaDelta audio DAC with headphone driver. The circuit includes a 1st order FIR, 2nd order low-pass filter and as well as the headphone driver all are integrated into the internal DAC by sharing one compact low-voltage class-AB operational amplifier per channel. Implemented in 0.18-mum CMOS process it achieves 90 dB dynamic range (DR) and consumes 2.6 mW per channel from 1-V supply.
Keywords :
CMOS integrated circuits; FIR filters; audio systems; digital-analogue conversion; driver circuits; headphones; low-pass filters; operational amplifiers; sigma-delta modulation; 1st order FIR filter; 2nd order low-pass filter; 3rd order SigmaDelta audio DAC; CMOS process; class-AB operational amplifier; dynamic range audio stereo; embedding headphone driver; size 0.18 mum; voltage 1 V; Delta-sigma modulation; Digital modulation; Driver circuits; Dynamic range; Finite impulse response filter; Headphones; Low pass filters; Operational amplifiers; Transfer functions; Voltage;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746231
