A systematic design methodology for power-optimal design of high-order multi-bit continuous-time Delta-Sigma modulators |
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| Authors: | Yi Ke Soheil Radiom Jan Craninckx Guy Vandenbosch Georges G. E. Gielen |
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| Affiliation: | (1) Department of Elektrotechniek, ESAT-MICAS, Katholieke Universiteit Leuven, 3001 Leuven, Belgium;(2) IMEC, Kapeldreef 75, 3001 Leuven, Belgium;(3) Department of Elektrotechniek, ESAT-TELEMIC, Katholieke Universiteit Leuven, 3001 Leuven, Belgium |
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| Abstract: | In this paper a systematic design methodology for high-order multi-bit continuous-time Delta-Sigma modulators is proposed. It provides a straightforward method for determining the coefficients of the modulator. The method is illustrated for a 4th-order 4-bit modulator with OSR of 8, while 20 MHz signal bandwidth and 12 bit resolution is achieved. The required GBW of the first integrator is less than 1.5 times the sampling frequency, which greatly reduces the overall power consumption. |
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