Presentation by
Dr. Michael Perrott, Silicon Laboratories, Nashua, NH
October 24, 2013
Fast and Accurate System Level Simulation of Time-Based Circuits Using CppSim and VppSim
Abstract
Time-based circuits encode analog information in the edge times of
binary-valued signals. These circuits benefit from the fast
transition times and high digital density offered by advanced
CMOS processes, and offer a
path to using digital circuits to perform analog processing of
signals. Recent examples of such circuits include digital
phase-locked loops and VCO-based analog-to-digital converters. In this
talk, we will present techniques for achieving
fast and accurate system level simulation of time-based circuits using the
freely available tools of CppSim and VppSim. These tools incorporate
an efficient protocol for encoding edge time information, and allow
seamless co-simulation of Verilog and C++ modules along with
nodal analysis of linear networks with switches. In addition to
discussing key techniques employed by these tools, a software demonstration
will be provided with examples including phase-locked loop, switched capacitor,
and power conversion circuits.
Slides from talk
High Performance Digital Fractional-N Frequency Synthesizers
Abstract
Digital phase-locked loops provide many implementation
advantages compared to their analog counterparts by avoiding large
capacitors for loop filters and the complications of designing
analog-intensive components such as charge pumps. A key question,
however, is whether such digital structures can support high
performance applications in which low jitter and high PLL bandwidth is
required? In this talk, we address this question by discussing
techniques to achieve high performance digital fractional-N
synthesizers, including high resolution time-to-digital conversion,
digital quantization noise cancellation, and low-jitter divider
structures. Measured results of a prototype will demonstrate that <
300 fs of rms jitter can be achieved with a relatively high PLL
bandwidth of 500 kHz.
Slides from talk
Biography
Michael H. Perrott received the B.S. degree in Electrical Engineering
from New Mexico State University, Las Cruces, NM in 1988, and the
M.S. and Ph.D. degrees in Electrical Engineering and Computer Science
from Massachusetts Institute of Technology in 1992 and 1997,
respectively. From 1997 to 1998, he worked at Hewlett-Packard
Laboratories in Palo Alto, CA, on high speed circuit techniques for
Sigma-Delta synthesizers. In 1999, he was a visiting Assistant
Professor at the Hong Kong University of Science and Technology. From
1999 to 2001, he worked at Silicon Laboratories in Austin, TX, and
developed circuit and signal processing techniques to achieve high
performance clock and data recovery circuits. He was an Assistant and
then Associate Professor in Electrical Engineering and Computer
Science at the Massachusetts Institute of Technology from 2001 to
2008. He was with SiTime Corporation from 2008 to 2010, where he
developed key technology for MEMS-based oscillators. He was a
professor at Masdar Institute in Abu Dhabi from 2011 to 2013, where he
focused on low power, mixed-signal circuits for health monitoring. He
is currently at Silicon Laboratories in Nashua, New Hampshire.
Photos from talk
coupled networks
CPPSIM vs VPPSIM
CPPSIM vs VPPSIM
Paul Davis, Roger Minear, Michael Perrott, Robert Peruzzi, Richard Booth
Angelo Mastrocola, Michael Perrott, Robert Peruzzi