Continuous-Time Digital Filters and Other Mixed-Domain Processors\N

The main part of this talk by Yannis Tsividis of Columbi University considers the mixing of two domains usually kept
separate: the digital domain, and the continuous time domain. When a
continuous-time analog signal is to be processed using conventional DSPs, it
is first sampled and quantized. This introduces aliasing of both the signal
and the quantization distortion. He proposes to quantize, but not sample, the
input signal, producing continuous-time binary signals which are processed
directly using continuous-time digital hardware. This eliminates aliasing and
results in much smaller in-band quantization error than is possible with
conventional digital techniques. Preliminary experimental and simulation
results support these claims. He then introduces other mixed-domain signal
processors, including linear analog filters which use nonlinear signal
decompositions and processors in which digital waveforms are processed
directly with analog circuits. The emphasis of the talk is on principles, some
of which may lead to practically important results whereas others may be
interesting only from a conceptual viewpoint.Yannis Tsividis received the B.S. degree from the University of Minnesota,
Minneapolis in 1972, and the M.S. and Ph.D. degrees from the University of
California, Berkeley, in 1973 and 1976, respectively. Since 1976 he has been
with the Department of Electrical Engineering, Columbia University, New York,
where he currently holds the Charles Batchelor Memorial Chair. He has done
extensive work in analog and mixed-signal MOS integrated circuits at the
device, circuit, system, and computer simulation level, starting with the
first fully-integrated MOS operational amplifier in 1975. A Fellow of the
IEEE, Dr. Tsividis has received or co-received several research awards,
including the 1984 Baker Prize Award for the best IEEE publication, the IEEE
Circuits and Systems Society's Darlington (1987) and Guilllemin-Cauer (1998)
Best Paper Awards, and the 2003 International Solid-State Circuits Conference
L. Winner Outstanding Paper Award. He received Columbia's Presidential Award
for Outstanding Teaching in 2003 and the IEEE Undergraduate Teaching Award in
2005.
 
Host:  Prof. John Choma

Location: Ethel Percy Andrus Gerontology Center (GER) - ontology Auditorium.

Audiences: Everyone Is Invited

Contact: Eric Mankin