A low power low voltage 16 bit audio ΣΔ modulator

A 16bit audio SigmaDelta modulator is designed, with only 360 muw power dissipation under 0.9 V supply. A feedforward third-order single loop architecture is adopted to decrease the power dissipation. A novel double-boost switch is proposed in the design to decrease the on-resistance. A low power cl...

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Bibliographic Details
Published in2009 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 3142 - 3145
Main Authors Xi Gou, Yi-ran Li, Jian-qiu Chen, Jun Xu, Jun-yan Ren
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2009
Subjects
Application specific integrated circuits
Bandwidth
CMOS technology
Consumer electronics
Digital filters
Low pass filters
Low voltage
Power dissipation
Quantization
Switches
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Summary:A 16bit audio SigmaDelta modulator is designed, with only 360 muw power dissipation under 0.9 V supply. A feedforward third-order single loop architecture is adopted to decrease the power dissipation. A novel double-boost switch is proposed in the design to decrease the on-resistance. A low power class-AB operational transconductance amplifier (OTA) with proposed self-adapted bias circuit is applied in the modulator, which make OTA can tolerate higher common mode input voltage than that with traditional bias circuit. The modulator is designed and fabricated in SMIC 0.18 mum 1P6M CMOS technology, with the core area of 0.46 mm 2 . The test results show that the modulator achieves SNR 91 db in 22 KHz audio bandwidth.
ISBN:1424438276
9781424438273
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2009.5118469