Title :
86 dB DR Cross-Coupled Time-Interleaved xx ADC for Audio Signal Band with 322 ΣA Current Consumption
Author :
Maloberti, Franco ; Choi, Yonyoung
Author_Institution :
Department of Electronics, University of Pavia, Pavia, Italy. franco.maloberti@unipv.it
Abstract :
An audio band sigma-delta ADC based on a new time-interleaved xx scheme isdescribed. The circuit achieves a very low power operation with the large dynamic range required for audio applications. This modified two channel time-interleaved scheme improves the power efficiency thanks to halved operating frequency in the paths, and a reduced number of levels in ADC and DAC. This sigma-delta modulator fabricated in a 0.18 μm CMOS process uses 1.8 V supply and ±0.5 V input range. Experimental results show that with a 35 dBFS input sine wave there are no tones above a 110 dB noise floor.
Keywords :
Acoustic noise; CMOS technology; Circuits; Clocks; Delta-sigma modulation; Dynamic range; Energy consumption; Frequency; Microphones; Sampling methods;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378598
