Tunable continuous-time bandpass /spl Sigma//spl Delta/ modulators with fractional delays |
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Authors: | Sobot R. Stapleton S. Syrzycki M. |
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Affiliation: | Simon Fraser Univ., Burnaby, BC, Canada; |
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Abstract: | An analytical design methodology for continuous-time (CT) bandpass (BP) /spl Sigma//spl Delta/ modulators is presented. Second- and fourth-order tunable continuous time BP /spl Sigma//spl Delta/ modulator design equations are presented. A novel /spl Sigma//spl Delta/ loop architecture, where the traditional CT BP loop filter function is replaced with the filter function with fractional delays, is proposed. Validity of the methodology is confirmed by mixed-signal behavioral simulations. |
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