PhD Defense: "Low-Cost Quality Assurance Techniques for High-Performance Mixed-Signal/RF Circuits and Systems"

Hsiu-Ming (Sherman) Chang

February 17th (Thursday), 2:00pm
CS Conference room (HFH 1132)

There exist a variety of quality assurance techniques for tasks ranging from post-silicon validation, silicon debugging, production testing, in-field testing, and life time resiliency. Adding dedicated circuitry (so called “DfX” approaches) to exclusively support each task would be too costly, as each technique incurs non-trivial overheads. In this talk, I will show that cost-effective quality assurance can be achieved by sharing resources among different DfX techniques and by going mostly digital for mixed-signal/RF DfX circuits. These techniques are demonstrated using case studies on digitally-assisted analog circuits and three-dimensional (3-D) integrated designs.

In the first part of the talk, I will show how to reuse calibration circuitry, which is often incorporated in modern mixed-signal/RF circuits as a design-for-yield feature, as a design-for-test feature for reducing production test time.

Then, I will present an all-digital built-in self-test (BIST) technique to characterize the transfer function of RF PLLs. This method is useful for validation, production testing, and online tuning.

Finally, I will talk about an error tolerance scheme for 3D CMOS imagers that can be used to tolerate manufacturing and online defects that can enhance the yield and reliability of the imager.

About Hsiu-Ming (Sherman) Chang:

Hsiu-Ming (Sherman) Chang received his B.Engr. degree in Electrical and Electronics Engineering (Industrial Education) from National Taiwan Normal University in 2002. He earned masters of science degrees in Electrical Engineering and Management Science and Engineering from Stanford University in 2006. He joined the SoC Design and Test Lab at the University of California, Santa Barbara in 2006 where he is currently pursuing a Ph.D. degree in Electrical and Computer Engineering under the supervision of Professor Kwang-Ting (Tim) Cheng. His current research interests include design and test of mixed-signal and radio-frequency circuitry.

Hosted by: Professor Tim Cheng