A 0.5-V 90-dB SNDR 102 dB-SFDR audio-band continuous-time delta-sigma modulator
Publication in refereed journal

香港中文大學研究人員

引用次數
替代計量分析
.

其它資訊
摘要A 0.5-V high performance continuous-time one-bit delta-sigma modulator is reported for audio applications. High performance under this ultra-low supply is achieved by a feed-forward modulator architecture for reduced integrator swing, a special switched-capacitor-resistor feedback for less sensitivity to jitter noise, and a fast-settling fully differential amplifier. The synthesized modulator also has a high thermal-noise-limited SNR of 91 dB over a 20 kHz bandwidth. The 0.5-V fully-differential gate-input amplifier employs an adaptive common-mode feedback frequency compensation circuit, which leads to a robust modulator performance against process, supply voltage and temperature variations. Fabricated in a standard 0.13 mu m CMOS process, the modulator achieves a spurious-free dynamic range (SFDR) of 101.9 dB and a signal-to-noise plus distortion ratio (SNDR) of 90 dB (A-weighted) over a 20-kHz signal bandwidth, with the latter being very close to the thermal noise limit. The modulator operates over a supply range from 0.4 to 0.75 V and a temperature range from -20 to 90 degrees C.
著者Chen Y, Pun KP
期刊名稱Analog Integrated Circuits and Signal Processing
出版年份2012
月份5
日期1
卷號71
期次2
出版社Springer Verlag (Germany)
頁次159 - 169
國際標準期刊號0925-1030
電子國際標準期刊號1573-1979
語言英式英語
關鍵詞Continuous-time delta-sigma modulator; Low-voltage amplifier; Low-voltage circuit
Web of Science 學科類別Computer Science; Computer Science, Hardware & Architecture; COMPUTER SCIENCE, HARDWARE & ARCHITECTURE; Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC

上次更新時間 2020-24-11 於 00:32