Past Event

Wideband Precision Continuous-Time Delta-Sigma Converters

May 2, 2022
2:00 PM - 3:00 PM
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EE Conference Room (Mudd 1300)


The conversion bandwidth of high-resolution (>16b ENOB) continuous-time delta-sigma modulators has largely been restricted to the  audio range. In this talk, I will  present the design, simulation and testing challenges  encountered while attempting to  increase  the bandwidth  of such converters  by an order of magnitude,  in the same process technology. I  will discuss solutions to these problems, and present the design of a CTDSM that achieves 105 dB SNDR over a 250kHz bandwidth in a 180nm  CMOS technology. The converter features the virtual-ground switched-resistor DAC, a chopped input integrator and FIR feedback, and consumes  24mW.


Shanthi Pavan
NT Alexander Institute Chair Professor
Department of Electrical Engg
Indian Institute of Technology, Madras
Chennai 600036