R. Timothy Edwards
HOME and OFFICE:
22815 Timber Creek Lane
Clarksburg, MD 20871-4001
Phone: (301) 528-5030
Cell: (240) 401-0616
- Current Prospects:
- I actively maintain a package of free, open-source EDA tools for
analog and digital VLSI design.
The analog design flow includes magic for VLSI layout,
ngspice for simulation, xcircuit for schematic
capture, netgen for LVS, and pcb for circuit board
layout. The digital design flow includes qflow to manage
the overall synthesis design flow, yosys to synthesize
logic from verilog source, timberwolf to do standard cell
placement, vesta for static timing analysis, and
qrouter for detail routing. I have authored the tools
xcircuit, qflow, vesta, and qrouter,
and have greatly improved the tools magic, IRSIM,
and netgen through continued development.
- Research Interests:
- Open-source EDA (Electronic Design Automation) tools
(algorithm development, programming, maintenance, and
Also: Architectures and algorithms for ``Evolvable hardware'',
field-programmable analog hardware,
novel MEMS technology for reconfigurable hardware interconnect,
and ``neuromorphic'' (biologically-motivated) systems.
- 9/93 to 3/99 Johns Hopkins University, Baltimore, MD.
Ph.D. in Electrical Engineering,
researching Analog VLSI with Drs. Gert Cauwenberghs (thesis
advisor) and Andreas Andreou.
Time-Frequency Acoustic Processing and Recognition: Analysis
and Analog VLSI Implmentations.
- 9/90 to 6/92 Stanford University, Stanford, CA.
M.S. in Electrical Engineering (MSEE)
Emphasis on (digital) VLSI custom and semicustom design, signal
processing, neural networks, and Analog VLSI systems.
- 8/86 to 5/90 Duke University, Durham, NC.
B.S. in Electrical Engineering (BSEE)
Satisfied requirements for B.S. in Physics
GPA = 3.92/4.00, class rank (School of Engineering) = 7/270
Emphasis during last two years on computer architecture, pattern
recognition and classification, and neural networks.
- Teaching Experience:
- 7/93 to 6/94, 1/95 to 6/95 Johns Hopkins University,
Taught lecture and lab courses in undergraduate microelectronics
in the JHU part-time program. Student evaluations are available
- 12/91 to 3/92 Stanford University, Stanford, CA.
ISL, Electrical Engineering Dept.
Worked as a teaching assistant for Dr. Abbas El-Gamal, EE-218,
``Semi-Custom VLSI''; included teaching and managing the laboratory
part of the course.
- Research and Work Experience:
- 2/12 to present Analog Devices, Inc., San Jose, CA.
Design engineer in clock and signal generation product
development, an extension of the product development done at
MultiGiG, which was bought by Analog Devices in 2012.
- 6/05 to 2/12 MultiGiG, Inc., Scotts Valley, CA.
Principal design engineer for research and product development
of the Rotary Traveling Wave Oscillator (RTWO) technology.
- 11/98 to 6/05 Johns Hopkins University Applied Physics
Laboratory, Laurel, MD.
Investigator on Advanced Technology Development (ATD) program
targeting the development of Field-Programmable Analog Array
(FPAA) devices for space applications.
Principal Investigator with Chang-Jiang Kim at UCLA on a NASA
grant project to develop a fabrication process for mercury
microswitch MEMS technology.
Principal Investigator for a project investigating the use of
template correlation methods for emulating dolphin sonar for
buried target classification.
- 6/95 to 3/99 Johns Hopkins University, Baltimore, MD.
Research assistant for Dr. Gert Cauwenbergs. Joint projects with
the Army Research Laboratory and with Dr. Fernando Pineda at the
Johns Hopkins Applied Physics Laboratory (APL).
- 6/94 to 12/94 Johns Hopkins University, Baltimore, MD.
Research assistant for Dr. Andreas Andreou.
- 2/91 to 6/93 Stanford University, Stanford, CA.
Helped visiting professor Michael Godfrey create a laboratory for
research in analog VLSI; worked on research projects including
an electronic cochlea with Neal Bhadkamkar and MOS transistor
modeling with Dr. Michael Godfrey.
- 7/92 to 12/92 Zilog Corporation, Campbell, CA.
Designed an Analog VLSI continuous wavelet transform chip for use
in a low-power speech compression system as part of Zilog's
telephone answering machine project. Several versions of this
chip were fabricated by Zilog; development of the idea was
completed at Johns Hopkins University.
- 3/92 to 6/92 Stanford University, Stanford, CA.
ISL, Electrical Engineering Dept.
Worked as a research assistant maintaining and updating the
EE-218 (semicustom VLSI) laboratory.
- 9/91 to 12/91 Stanford University, Stanford, CA.
STAR Laboratory, EE Dept.
Worked as a system administrator for a group of workstations,
including installation and maintenance of CAD software.
- 6/91 to 8/91 Star Semiconductor, Inc., Warren, NJ.
Designed and implemented a discrete wavelet transform
decomposition and reconstruction system as an application note
for the Star Semiconductor SPROClab DSP development system.
- 5/90 to 8/90 Continuous Electron Beam Accelerator Facility
(CEBAF), Newport News, VA. Physics Division
Wrote several thousand lines of FORTRAN code to create
a complete data acquisition and display program for a full-scale
prototype particle detection chamber. The final product met all
standards for the VAX/VMS operating system.
- 5/89 to 8/89 CEBAF Physics Division
Wrote FORTRAN software for a data acquisition system,
designed and built a laser-based calibration system for particle
- Journal Publications:
- R. T. Edwards, M. Cohen, G. Cauwenberghs, M. Vorontsov, and
G. Carhart, ``Analog VLSI Parallel Stochastic Optimization
for Adaptive Optics,'' Learning on Silicon,
Gert Cauwenberghs, ed., Kluwer publishers (1999).
- R. T. Edwards and G. Cauwenberghs, ``Mixed-Mode Correlator
for Micropower Acoustic Transient Classification,''
J. Solid-State Circuits, vol. 34, no. 10, pp. 1367-1372.
- R. T. Edwards and G. Cauwenberghs, ``Synthesis of Log-Domain
Filters from First-Order Building Blocks,'' (to appear in)
Int. J. Analog Integrated Circuits and Signal Processing,
special issue on ``Dynamic Translinear Circuits''.
- R. T. Edwards and G. Cauwenberghs, ``Oversampling Architecture
for Analog Harmonic Modulation,'' IEEE Trans. on Circuits
and Systems, vol. 43, no. 8, pp. 696-698.
- F. Pineda, G. Cauwenberghs, R. T. Edwards, K. Ryals, and
D. Steigerwald, ``Bang, Click, Thud, or Whack?'' Johns
Hopkins APL Technical Digest, vol. 18, no. 2, pp. 244-253.
- Conference Publications:
- R. T. Edwards and C.-J. Kim, ``Breaking the Resistivity Barrier,''
Proceedings of the Third NASA/DoD Workshop on Evolvable
Hardware (EH-2001), IEEE Computer Society, pp. 167-171,
- R. T. Edwards, ``Acoustic Transient Classification with a
Template Correlation Processor,'' 2nd European Workshop
on Neuromorphic Systems, Stirling, Scotland, Sept. 1999.
- R. T. Edwards, K. Strohbehn, S. E. Jaskulek, and R. Katz, ``Analog
Module Architecture for Space-Qualified Field-Programmable
Mixed-Signal Arrays,'' 2nd annual Military and Aerospace
Applications of Programmable Devices and Technologies Conference
(MAPLD), JHU-APL, Laurel, MD, October 1999.
- R. T. Edwards and G. Cauwenberghs, ``Log-Domain Circuits for Auditory
Signal Processing,'' 42nd Midwest Symposium on Circuits and
Systems (MWSCAS), New Mexico State University, August, 1999.
- M. Cohen, R. T. Edwards, G. Cauwenberghs, M. Vorontsov, and
G. Carhart, ``AdOpt: Analog VLSI Stochastic Optimization for
Adaptive Optics,'' International Joint Conference on Neural
Networks, Washington, DC, July 1999.
- R. T. Edwards, G. Cauwenberghs, and F. Pineda, ``Optimizing
Correlation Algorithms for Hardware-based Transient
Classification,'' Neural Information Processing Systems
(NIPS), Denver, 1998.
- R. T. Edwards and G. Cauwenberghs, ``A Second-Order Log-Domain
Bandpass Filter for Audio Frequency Applications,''
Int'l Symp. on Circuits and Systems (ISCAS), Monterey,
CA, June, 1998.
- R. T. Edwards, G. Cauwenberghs, and F. Pineda, ``Acoustic
Transient Classification with Micropower VLSI Neuromorphic
Processors,'' 5th Annual Battlefield Acoustics Symposium,
United States Army Research Laboratory, Adelphi, MD, September
- R. T. Edwards, G. Cauwenberghs, and F. Pineda, ``A Mixed-Signal
Correlator for Acoustic Transient Classification,''
Proc. ISCAS '97, vol. 1, pp. 621-625, June, 1997.
- F. Pineda, G. Cauwenberghs, and R. T. Edwards, ``Bangs, Clicks,
Snaps, Thuds, and Whacks: An Architecture for Acoustic Transient
Processing,'' Neural Information Processing Systems (NIPS),
- R. T. Edwards and G. Cauwenberghs, ``A VLSI Implementation of
the Continuous Wavelet Transform,'' Proc. ISCAS '96,
vol. 4, pp. 368-371, May, 1996.
- R. T. Edwards and G. Cauwenberghs, ``Analog VLSI Processor
Implementing the Continuous Wavelet Transform,'' Neural
Information Processing Systems (NIPS), Denver, 1995.
- T. Edwards and M. Godfrey, ``An Analog Wavelet Transform Chip,''
IEEE Int'l Conf. on Neural Networks, vol. 3, 1993, pp.
- R. T. Edwards and M. D. Godfrey, Analog wavelet transform
circuitry. U.S. Patent no. 5,495,554.
- F. Pineda, G. Cauwenberghs, and R. T. Edwards, Methods and
apparatus for acoustic transient processing. U.S. Patent
- Honors and Awards:
- Phi Beta Kappa
- Tau Beta Pi
- Graduation Summa Cum Laude and with distinction (Duke University 1990)
- Eta Kappa Nu Electrical Engineering honor society (president, 1989-1990)
Last updated: July 23, 2014 at 9:20pm