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A time-interleaved continuous-time ΔΣ modulator with 20MHz signal bandwidth

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2 Author(s)
Caldwell, T.C. ; Toronto Univ., Ont., Canada ; Johns, D.A.

This paper presents the first implementation results for a time-interleaved continuous-time ΔΣ modulator. The 3rd-order low-pass modulator operates at an oversampling ratio of 5 with a time-interleaving factor of 2 at sampling frequencies of 100MHz and 200MHz. It achieves an SNDR of 57dB and 49dB in signal bandwidths of 10MHz and 20MHz, respectively.

Published in:

Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European

Date of Conference:

12-16 Sept. 2005