学術雑誌論文

学術雑誌論文

IEICE Transactions on Electronics. 2012, E95-C(8), p. 1427-1433

A High Dynamic Range and Low Power Consumption Audio Delta-Sigma Modulator with Opamp Sharing Technique among Three Integrators

英語

2012-08-01

https://doi.org/10.1587/transele.E95.C.1427

Kanemoto D., Ido T., Taniguchi K.. A high dynamic range and low power consumption audio delta-sigma modulator with opamp sharing technique among three integrators. IEICE Transactions on Electronics E95-C, 1427 (2012); https://doi.org/10.1587/transele.E95.C.1427.

A low power and high performance with third order deltasigma modulator for audio applications, fabricated in a 0.18 μmCMOS process, is presented. The modulator utilizes a third order noise shaping with only one opamp by using an opamp sharing technique. The opamp sharing among three integrator stages is achieved through the optimal operation timing, which makes use of the load capacitance differences between the three integrator stages. The designed modulator achieves 101.1 dB signalto-noise ratio (A-weighted) and 101.5 dB dynamic range (A-weighted) with 7.5mWpower consumption from a 3.3V supply. The die area is 1.27mm2. The fabricated delta-sigma modulator achieves the highest figure-of-merit among published high performance low power audio delta-sigma modulators.

Copyright © 2012 The Institute of Electronics, Information and Communication Engineers

97772

A High Dynamic Range and Low Power Consumption Audio Delta-Sigma Modulator with Opamp Sharing Technique among Three Integrators

電子情報通信学会

英語

2012-08-01

IEICE Transactions on Electronics

E95-C

8

1427

1433

https://doi.org/10.1587/transele.E95.C.1427

https://hdl.handle.net/11094/97772