Abstract:
We present an aliasing-free variable gain Delta Sigma Modulator (DSM). The variable gain of the 2-1-1 MASH architecture DSM is carried out by using additional sampling ca...View moreMetadata
Abstract:
We present an aliasing-free variable gain Delta Sigma Modulator (DSM). The variable gain of the 2-1-1 MASH architecture DSM is carried out by using additional sampling capacitors. This feedforward gain adjustment offers better S2-1-1 MASH architecture DSMNR performance than feedback gain adjustments discussed in the literature, since the internal states of the modulator loop are driven at full signal swing. To eliminate the need for an analog anti-aliasing filter, a decimation filter with a sharp cutoff is employed in the reconstruction of the analog signal. The design is carried out in a 0.6 μm CMOS technology. Measurement & implementation results for the above concepts compare favorably with similar designs in recent literature.
Published in: Proceedings of the 17th International Conference Mixed Design of Integrated Circuits and Systems - MIXDES 2010
Date of Conference: 24-26 June 2010
Date Added to IEEE Xplore: 19 August 2010
ISBN Information:
Conference Location: Wroclaw, Poland