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14-bit DR, 20 kHz BW, 2-2 MASH SI-Σ㪔 modulator using low-distortion feedforward topology

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3 Author(s)
Blumer, R.T. ; Fed. Univ. of Santa Maria, Santa Maria, Brazil ; Prior, C.A. ; Martins, J.B.

This paper presents the design and simulation results of a switched-current (SI) 2-2 MASH Sigma-Delta Modulator (ΣΔM). The modulator is composed by a low-distortion swing suppression topology which is highly suitable for wideband applications. It was realized using fully-differential circuitry with common-mode feedback. The circuit performs 14-bit dynamic range (DR) up to 5 MHz clock frequency and 20 kHz bandwidth. The modulator was designed in 0.6 μm CMOS technology and was sent to the foundry to prototype.

Published in:

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Date of Conference:

20-23 May 2012