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A bandpass sigma-delta for software low-power and low-voltage radio by using PATH technique

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3 Author(s)
Yiu Wu ; Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA ; Ling, J. ; Helms, W.J.

This paper proposes a PArallel Two patH (PATH) technique for oversampled bandpass analog-to-digital converter in low-power and low-voltage environment to relax the settling requirement and to increase signal-to-noise ratio. The design considerations for the implementation are evaluated and strategies overcome the possible problems. It is clocked at 20 MHz and digitized a 200 kHz bandwidth signal centered at 1O MHz with 87 dB signal-to-noise ratio (SNR) while suppressing the undesired mirror image signal at 40 dB in 1.8-V supply voltage

Published in:

VLSI, 1999. Proceedings. Ninth Great Lakes Symposium on

Date of Conference:

4-6 Mar 1999