Steve M. Gehlbach, Ph.D.
Office: 1777 Lafayette Street
Santa Clara, CA 95050
(408) 748-1814 x456 (office Kesa)
Email: steve @ kesa . com
Education: Stanford University, Ph.D., (Electrical Engineering)
Southern Methodist University, M.S.E.E., (With Honors)
Texas A&M University at Kingsville (formerly Texas A&I), B.S.E.E, (Summa Cum Laude)
Associate in Arts (Spanish), Foothill College, 2009.
1982-present President, Kesa Corporation, Santa Clara, California; consulting engineering and custom product development providing prototypes and low volume production for medical and industrial companies involved in ultrasonic imaging, semiconductor control systems, embedded real-time Linux systems, and related fields; consumer and industrial product development. Develop and manufacture web/LAN-enabled, computer-based telephone systems. Develop, manufacture, service, and sell the ECS-3000 computer control system for the Varian 3190/3290 semiconductor wafer coater.
1997-2004 President, Nexpath Corporation, Santa Clara, California; Developed, manufactured and sold a web and LAN enabled computer based telephone system. Managed trade shows and sold product through distribution and direct via the Internet.
1978-1982: Research Engineer, Senior Research Engineer, Varian Associates, Palo Alto, California; designed the RF receiver electronics for several ultrasonic imaging instruments; initiated the development and system design of a new low cost, phased array imaging instrument using charge coupled devices; developed new concepts in phased array ultrasound imaging system design and signal processing.
Publications and Presentations:
Gehlbach, S.M. and Alvarez, R.E., Digital Ultrasound Imaging Techniques Using Phasor Sampling and Raster Line Reconstruction, presented at the Fifth International Symposium on Ultrasonic Imaging and Tissue Characterization, Washington, D.C., June 1980.
Gehlbach, S.M. and Alvarez, R.E., Digital ultrasound imaging techniques using vector sampling and raster line reconstruction, Ultrasonic Imaging 3, 83-107 (1981)
Gehlbach S.M., Pulse Reflection Imaging and Acoustic Speckle, Ph.D. Dissertation, Stanford University (March, 1983).
Gehlbach, S.M., Quantitative Analysis of Acoustic Speckle, presented at the Eighth International Symposium on Ultrasonic Imaging, Washington, D.C., June 1983.
Gehlbach S.M., Sommer, F.G., and Stern, R., Scatterer induced frequency variations in reflected acoustic pulses: Implications for tissue characterization, Ultrasonic Imaging 7, 172-178 (1985).
Gehlbach, S.M., IBM PC-Compatible High Speed Signal Acquisition Design Using the 51C259 CHMOS Dynamic RAM, Intel Application Note #AP-250, Intel Corporation, 1985.
Gehlbach, S.M., and Selfridge, A.R., KLM Model Implementation Using Transfer Matrices, presented at the IEEE 1985 Ultrasonics Symposium, 1985.
Gehlbach, S.M., and Sommer, F.G., Frequency Diversity Speckle Processing, presented at the Eleventh International Symposium on Ultrasonic Imaging and Tissue Characterization, Washington, D.C., June 1986.
Gehlbach, S.M., and Sommer, F.G., Frequency diversity speckle processing, Ultrasonic Imaging 9, 92-105 (1987).
Gehlbach, S.M. and Sommer, F.G., Speckle Reduction Processing, presented at the International Symposium on Pattern Recognition and Acoustical Imaging, Newport Beach, California, 1987. Published in Proc. SPIE Vol. 768-21, 1987.
Segal, J., Pearl, R.G., Ford, A.J., Stern, R.A., and Gehlbach, S.M., Instantaneous and continuous cardiac output obtained with a Doppler pulmonary artery catheter, Journal of American College of Cardiology 13, 1382-1392 (1989).
Gehlbach, Steve M., United States Design Patent No. D 323,195: Christmas Tree Ornament.
Gehlbach, Steve M., Venkatachalam, K.L., United States Patent No. 5,115,416: Active Transducer Assembly for a Phased Array Depth Sounder.
Gehlbach, Steve M., United States Patent No. 5,131,394: Ultrasonic Guided Needle.
Gehlbach, Steve M., United States Patent No. 5,131,395: Ultrasonic Apparatus for Guiding Needles into Surface Vessels.
Skills and Interests:
Current research interests are embedded real-time systems using Linux as the operating system. Porting older Unix programs to Linux. Reverse engineering of software and hardware systems for writing interoperative software, primarily in Linux. Open source PC-compatible BIOS such as the Linux Bios project. Maintaining and supporting legacy PC hardware using Linux.
Electrical engineering skills include analog and RF design, discrete digital and ASIC design using Xilinx and Verilog RTL. Software skills in order of proficiency: Perl, bash/shell, SQL, C, PHP, HTML/CGI, C++. Skilled in the loading, installation, and configuring of Linux systems using the Debian release. Some basic capability in writing Linux drivers for release 2.4. Management of small crews (10-20) of hardware and software engineers.
2001-present. Build houses in Tecate, Mexico for the less fortunate. Trips are organized by The Kings Academy, Sunnyvale, CA. The group of about 600 high school students and adults travels to Mexico via 80 car caravan one week per year in late March or early April, and builds 15-20 small houses each year.
2006-7. Work on the Habitat for Humanity project at the Morrisey Street project in Santa Cruz, putting up drywall and digging irrigation trenches, putting in electrical, etc.