Title :
An audio cascaded ΣΔ modulator using gain-boost class-C inverter
Author :
Luo, Hao ; Han, Yan ; Liu, Xiaopeng ; Liang, Guo ; Liao, Lu
Author_Institution :
Inst. of Microelectron. & Photoelectron., Zhejiang Univ., Hangzhou, China
Abstract :
This paper provides an audio 2-1 cascaded ΣΔ modulator using a novel gain-boost class-C inverter. By introducing a 3-μW gain-boost module, the inverter DC-gain is increased from 48dB to 67dB. The proposed inverter-based ΣΔ modulator chip is implemented in 0.13-μm CMOS process, and achieves 86-dB peak-SNDR, 89-dB peak-SNR and 90-dB DR over 22.05-KHz bandwidth at 1.2-V supply consuming 360μW, which demonstrates that the gain-boost class-C inverter is particularly suitable for micro-power high-resolution applications.
Keywords :
CMOS integrated circuits; invertors; sigma-delta modulation; CMOS process; audio 2-1 cascaded ΣΔ modulator; audio cascaded ΣΔ modulator; bandwidth; gain-boost class-C inverter; gain-boost module; inverter DC-gain; inverter-based ΣΔ modulator chip; micropower high-resolution applications; Accuracy; Bandwidth; Inverters; Modulation; Semiconductor device measurement; Threshold voltage; Transistors; ΣΔ modulator; class-C inverter; gain-boost; micro-power;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2011 International Conference of
Conference_Location :
Tianjin
Print_ISBN :
978-1-4577-1998-1
Electronic_ISBN :
Pending
DOI :
10.1109/EDSSC.2011.6117686
