|
SJR Technologies |
|
Electronic Products and Services |
|
About SJR Technologies |
|
Steven J. Rathjen |
|
A freelance engineer with over 20 years of freelance experience and over 28 years of engineering experience offering quality, low cost electrical and software design services and products. |
|
E-mail: sjr@sjrtech.com |
|
Steven J. Rathjen Expert Electronics Hardware Designer and Firmware Programmer Providing the highest quality design services, from concept to production, at a very low cost by removing overhead, remaining flexible to project requirements and offering productivity efficiencies wherever possible Expertise
|
|
Resume : |
|
Firmware Development ARM, MSP430/2, 8051, PIC ST Micro, Nordic, TI, Silicon Labs Linux, MS Windows Code Analysis, MISRA-C Test and Production Tools Development Linux, MS Windows, Android GTK, Qt, C# Mechanical: CAD (FreeCAD, Solidworks) 3D Printing (FDM and Resin) |
|
New Technology R&D Electrical: In-house lab with test equipment Digital signal processing Complex real-time algorithms PCB Design and Prototyping Schematic, layout (OrCAD, Altium) Assembly: Surface mount Solder paste Reflow oven |
|
Employment History OptiComp in Zephyr Cove, NV – Embedded Systems Engineer - 2008 to 2010 Responsibilities included lead of the Embedded Systems team; Design hardware and firmware for multi-channel +40Gb/s electrical to optical transceiver’s embedded Digital Diagnostic Transceiver Controller (DDTC) using SiLabs 8051 MCU (IAR, SDCC, Keil) for compliance to MSA DDMI specifications and also developed custom specification for OptiComp’s multi-channel transceiver configurations; Designed schematics and circuit layouts (OrCAD capture & PCB Editor) for in-house firmware development and test platforms, Implemented network protocol (RapidIO, Ethernet, PCIe) test and demonstration platforms using FPGA’s (Xilinx Virtex-5) with multi-gigabit SERDES (GTP, GTX); Architected logic for RapidIO switch/router for satellite plug-n-play applications (SPA); developed reusable PHY layer IP (Verilog); Design compliance for airborne systems; Conducted heavy-ion exposure test for satellite electronics applications (U.C. Berkeley 88-inch Cyclotron June 2009); Technical collaboration with contractors; Writing specifications for new technologies; Conducting and analyzing research and writing technical proposals and reports for customers including SBIR’s, U.S. Defense and Homeland Security agencies. Self Employed - Embedded System Engineer - 2002 to 2008 See Portfolio Kurt Manufacturing in Blaine, MN - Senior Electrical Engineer - 1996 to 2002 Responsible for all design work relating to a family of data acquisition hardware (KurtUSB) including: product idea and concept, schematic circuit design and board layout (OrCAD, Ultiboard), firmware programming, and Windows DLL and USB device driver development. Conducted FCC and CE compliance testing (TÜV Taylor Falls, MN). Also responsible for industrial control system design on automated measurement machinery including: circuit design, PLC (Allen-Bradley) and touch screen programming, servo and frequency drive configuration, and mechanical and pneumatic troubleshooting as well as startup at customer facilities. Simplimatic Engineering in Forest Lake, MN - Electrical Engineer - 1994 to 1996 Responsibilities included industrial controls design, PLC (AB, Modicon, and Siemens) and HMI programming, electrical, mechanical, pneumatic and hydraulic troubleshooting and field service on large-scale automated package handling machinery mainly for the food and beverage industry. PC Express in Eden Prairie, MN – Computer Engineering Intern - 1994 Responsibilities included evaluation and testing of PC hardware components, such as video cards and motherboards, calculating power supply requirements and making recommendations for new product offerings. Also assisted with the troubleshooting and repair of computers. Mankato State University in Mankato, MN – Software Tutor - 1994 Tutored university students in Microsoft Assembler programming during weekly scheduled labs, assisting the professor, and also was available in the computer lab for additional tutoring.
Achievements Designing with Multi-Gigabit Transceivers at Xilinx Learning Center in San Jose, CA 2008 Private Pilot License and Aircraft Owner since 2007 Patent (with Kurt Mfg.) #20070095819 (pending) - Controller to Provide a Uniform Temperature for Electric Frying Pans Patent (with Osprey Medical): 11,135,375 and 11,219,719
Bachelor of Science in Electrical Engineering Technology Mankato State University, MN. Graduated 1994 Pre-College Achievements: Civil Air Patrol (Air Force Youth Auxiliary) - Mitchell Award American Legion - Minnesota Boys State Delegate Minnesota YMCA Youth in Government - Deputy Attorney General
|
|
© 2024 SJR Technologies Inc. |
|
E-mail: info@sjrtech.com |
|
18124 Wedge Parkway PMB 1062 Reno, NV 89511 |