Patrick Wilhelm Email & Phone Number

Reston, Va, Us

ASRC Federal, Egg Harbor Township, NJ 5-2017 to PresentEngineer II, Principal • Hardware Engineer under the AJW 1462 group, second level engineering• ASR-9 Radar Data Communications Equipment Modernization project Designed a microprocessor-based communications circuit card assembly to interface with the radar receiver message interface processor (MIP) on the ASR-9 radar receiver backplane (the design implements Ethernet ports as part of a network communications system which provides air traffic TRACONs and control towers radar target and weather data which is currently accomplished by obsolete modems) Designed a microprocessor-based communications CCA to interface with the radar six-level and WSP weather processors and system control Wrote VHDL code for the FPGAs (Field Programmable Gate Array) which receive and format raw radar and weather data messages from the backplane to present to the processor on a local bus Designed an FPGA-based test fixture and wrote VHDL code to simulate radar and weather message data to test the circuit card assemblies in production Drew schematics and laid out circuit cards, which included layout of DDR-2 SDRAM, using Altium Designer CAD software• ASR-9 Modulator Pulse Assembly Control & Monitor Circuit Card Replacement project lead Performed circuit analysis of the PFN (Pulse Forming Network) slow and fast servo loop circuits Designed soft start circuit for the PFN Designed circuit to increase the adjustment range of the PFN voltage Researched alternate electronic components to replace obsolete components and incorporated into the updated design Replaced the obsolete FPGA and ported existing VHDL code to the new FPGA Drew schematics and laid out circuit card using Altium Designer CAD software Designed electrical test fixture for use in manufacturing test Wrote manufacturing test procedure Updated ASR-9 technical instruction books

Egg Harbor Township, New Jersey, Us

Hi-Tec Systems, Inc., enhances the safety and security of air travel. Hi-Tec engineers and researchers develop new technologies, modernize air traffic management systems, create performance measures for Federal Aviation Administration inspectors, improve airport screening for passengers, weapons and cargo, and design antiterrorism plans. Hi-Tec provides engineering, research and IT services to agencies in the U.S. Departments of Transportation, Homeland Security, Defense, and NASA, as well as the U.N.’s International Civil Aviation Organization, aviation authorities, airports, and airlines around the world.

Sielox designs hardware and software for the electronic access control industryExtensive experience with PADS Power Logic and ORCAD schematic capture design software,VHDL and ModelSim digital logic design.

Thorofare, Nj, Us

Checkpoint designs and develops passive (powered by the field) RFID (Radio Frequency Identification) communications systems for retail applications.

Telegenix designs and manufactures communications switches for the FAA and military.Performed high speed digital signal analysis for the characterization of Telegenix's Procom 2000 communications switch backplane and verification of the bus driver design.Designed the hardware and wrote the firmware in C for a microcontroller-based design of the redundant switch-over circuitry for the Procom 2000 switch.Worked with manufacturing and wrote test plans to bring the Procom 2000 hardware into production.

Thorofare, Nj, Us

Designed a Single Board Computer based on National's NS486SXF Microprocessor. The board incorporated a PC-104 (ISA) Bus (bus control and ready logic PLD), four RS-232 serial ports, a 10-BaseT Ethernet chip set, and an ECP parallel port. Performed high speed digital analysis of buses to ensure proper function. Wrote complete manual and manufacturing test procedure for the Single Board Computer.Wrote the RS-232 communication's driver and interface for Checkpoint's RFID Tag Programmer in Visual BASIC. The Tag Programmer is a dedicated piece of hardware which programs Checkpoint's RFID passive tags. The tag IC has 154 bits of EEPROM for user data (IC design by Microchip Technology, Inc.).Wrote the firmware in C and assembly for Checkpoint's line of Access Control RFID tag readers (Performa). Wrote the firmware in C and assembly for Checkpoint's Slimline RFID reader for libraries. Wrote the firmware in C and assembly for Checkpoint's Portable Inventory RFID reader for libraries. Several hundred of these RFID tag readers are in the field.Designed an IrDA transceiver board for wireless download of data from Checkpoint's Portable RFID Reader to a server.Discovered and corrected many issues with the RFID passive tag: Out of spec ICs (high data rate), wire bonding problems, programmer hardware issues.Wrote all field service and test procedure documentation for Checkpoint's Self Check-out Station, Long Range Reader, and Tag Pad products.Characterized Checkpoint's short range antenna used in Checkpoint's Self-Check Station and Tag Pad Reader.

Drexelbrook manufactures ultrasonic and RF level control instrumentation.; Responsible for point-level (On/Off) ultrasonic product line.Designed receiver and drive circuit for a loop-powered (4-20mA) ultrasonic level measurement instrument.Designed gain control hardware for a microcontroller-based ultrasonic level instrument.

BAFCO manufactures electronically-controlled hydraulic actuators for oil refineries and polyethelene process plants.Designed a capacitive proximity sensor.Designed a decoding circuit for a glass-scale reader head for characterization of LVDTs.Wrote application software in BASIC which utilizes the parallel port of a PC to control a coil winding machine. Provides complete robotic control of stepper motor-based coil winding machine.Designed a digitally-controlled pump-starter with fail safe.Worked extensively with analog positioning systems and BAFCO's Frequency Response Analyzers.

Bsee, Electrical Engineering

Bachelor'S Of Science, Electrical Engineering

Associate’S Degree, Science