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In this thesis, a method of time-interleaving continuous-time delta-sigma modulators is investigated. The derivation of the modulator starting from a discrete-time time-interleaved structure is presented. With various simplifications, the resulting modulator has only a single-path of integrators, making it robust to DC offsets. A third-order low-pass continuous-time time-interleaved delta-sigma modulator with an oversampling ratio of 5 is designed in a 0.18mu m CMOS technology with a 1.8V supply voltage. Experimental results show that an SNDR of 57dB and a dynamic range of 60dB are obtained with a sampling frequency of 100MHz. With a sampling frequency of 200MHz, an SNDR of 49dB with a dynamic range of 55dB is achieved. The power consumption is 101mW at 100MHz, and 103 mW at 200MHz.
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Adviser: David A. Johns.
Thesis (M.A.Sc.)--University of Toronto, 2004.
Electronic version licensed for access by U. of T. users.
Source: Masters Abstracts International, Volume: 43-03, page: 0927.
MICR copy on microfiche (2 microfiches).
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