MOSFET-only 3RD-order Ʃ-∆ modulators

Document Type

Conference Proceeding

Date of Original Version



The linearity of higher order Ʃ-∆ modulator using MOSFET capacitors is examined. Two 3rd-order network structures are investigated. For low-voltage power supplies with reference voltages under 1 volt, the performance of a MOSFET-only modulator is predicted to be very close to that of a modulator using linear capacitors. It is possible to realize similar performance in selected modulator network structures. We investigate the performance of a 2-1 cascade and a 3rd-order iflf topology in a 0.35/μm process.

Publication Title, e.g., Journal

Proceedings of the 8th International Workshop on ADC Modelling and Testing, IWADC 2003

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