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PhD Oral Preliminary Examination – Xin Meng


Thursday, June 12, 2014 12:00 PM - 2:00 PM

Low-Distortion Wideband Delta-Sigma ADCs with Shifted Loop Delays
Several novel low-power low-distortion ΔΣ modulator topologies with shifted loop delays are presented. Both single-sampled and double-sampled modulators are discussed. The proposed architectures can relax the critical timing for quantization and for dynamic element matching (DEM) by shifting the loop delays. A delay-free integrator in the last stage is used to perform the active summation, hence eliminating the active adder. The proposed topology simplifies the feed-forward paths, and saves power consumption and capacitor area. Noise-coupled technique can be utilized to enhance the noise shaping. To verify the effect of the proposed topology, third-order ΔΣ modulators with and without noise coupling were analyzed and simulated.

Major Advisor: Gabor Temes
Committee: Karti Mayaram
Committee: Arun Natarajan
Committee: Raviv Raich
GCR: Roberto Albertani 


Kelley Engineering Center (campus map)
4107
Nicole Thompson
1 541 737 3617
Nicole.Thompson at oregonstate.edu
Sch Elect Engr/Comp Sci
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