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A 4th-order switched-capacitor sigma-delta A/D converter using a high-ripple Chebyshev loop filter

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3 Author(s)
M. F. Snoeij ; Lab. of Electron. Instrum., Delft Univ. of Technol., Netherlands ; O. Bajdechi ; J. H. Huijsing

A compact low-power audio sigma-delta A/D converter is presented. By using a high-ripple Chebyshev loop filter the output swing of the integrators is reduced, which decreases power consumption and chip area. Measurements on the implementation show a peak SNDR of 91 dB and a dynamic range of 102 dB over a signal bandwidth of 11 kHz. The power consumption of the sigma-delta loop is 1.5 mW at a supply voltage of 2.5 V

Published in:

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on  (Volume:1 )

Date of Conference:

6-9 May 2001