Title :
A 1-V 190-μW Delta-Sigma Audio ADC in 0.13-μm full digital CMOS techonology
Author :
Yang, Zhenglin ; Yao, Libin
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
A 1-V 190-muW delta-sigma modulator with chopper stabilization and bootstrapped switch is designed using a full digital 0.13-mum CMOS technology. The fourth-order feedforward architecture is employed to reduce the output swings of each integrator and relax the DC gain requirement of the operational transconductance amplifier; hence saves power and reduces distortion. The core area excluding PAD is 0.9 times 0.64 mm2. The simulation results show that the modulator achieves 99.8 dB peak signal-to-quantization-noise ratio (SQNR) and -102 dB total harmonic distortions over the 20 kHz signal bandwidth with an OSR of 125.
Keywords :
CMOS digital integrated circuits; amplification; bootstrap circuits; choppers (circuits); delta-sigma modulation; feedforward; integrating circuits; operational amplifiers; DC gain; bandwidth 20 kHz; bootstrapped switch; chopper stabilization; delta-sigma audio ADC; delta-sigma modulator; fourth-order feedforward architecture; full digital CMOS techonology; integrator; operational transconductance amplifier; power 190 muW; signal-to-quantization-noise ratio; size 0.13 micron; total harmonic distortions; voltage 1 V; Atherosclerosis; CMOS technology; Choppers; Delta modulation; Digital modulation; Operational amplifiers; Power amplifiers; Switches; Total harmonic distortion; Transconductance;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2008. EDSSC 2008. IEEE International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-2539-6
Electronic_ISBN :
978-1-4244-2540-2
DOI :
10.1109/EDSSC.2008.4760650
