Experience

Digital Signal Corporation

• United States
• Security and Investigations
• 1 - 100 Employee

• Sr Staff Engineer

  • Sep 2012 - Present

  I am a senior member of a circuitry design team for long range 3D Ladar/Camera Facial recognition/detection systems and 3D Speckle Camera database enrollment systems. • Designed 10 channel 1550nm PIN diode receiver front end using trans-impedance amplifiers, 9 order elliptical filters, and subsequent Low noise 70 Mhz IF chain for sampling at 160Mhz using 14Bit Linear Technology AD Converters. • Designed DAC controlled WB low noise Laser drivers for linearization of chirped 1550nm DFB lasers. • Designed Eye safe and overdrive protection/diagnostic circuitry for DFB laser. • Designed full bridge low noise TEC PID controller for DFB laser modules. • Designed remote Canon EOS Camera lens controller using TIMPS430 type micro-controller for aperture and focus control via a C mount attached to high definition Point-grey camera. • Designed test fixtures for manufacturing in order to adjust/calibrate/pre-qualify DFB lasers for chirped linearization prior to installation into the 3D recognition system. • Assisted in design and analysis of 3D and Enrollment systems SMPS. • Designed High voltage speckle flash and control circuitry. • Used ORCAD as the Schematic front end where net lists are imported into the Mentor Graphics PADS layout tool. I used PADS for all design PCB layouts and interfaced with PCB fabrication/assembly service providers. • I have several years of experience using different PCB layout tools.



General Dynamics Robotic Systems

• United States
• Defense and Space Manufacturing
• 1 - 100 Employee

• Staff Engineer

  • Jul 2002 - Sep 2012

  • MMWR (Millimeter Wave Radar) interface that includes Nuclear event detection, heater control,Temperature monitoring, Power Conversion, Power Isolation, and CANBUS interface/ isolation. • ANS Ladar receiver PCB development with Low noise HV APD power supply, Low Noise TEC controller for APD (Avalanche Photo Diode) sensor array, Low noise DC/DC converters with post Linear power supplies, and temperature monitoring. • Designed and developed unique Azimuth PLL Brushless DC motor control circuitry for ANS Ladar. • Designed and developed/selected the COTS input power, filtering, and interface for the ANS Lader platform. This includes separate discrete MIL-STD 461 compliant filtering, discrete input reverse polarity/low voltage detection circuitry, inrush current limiting, and nuclear event detection/shutdown circuitry. • Designed Coaxial LASER Hysteric current controlled power supplies and TEC controllers having integrated over temperature shutdown and programmable current. • Designed Coaxial Laser seed PFN (Pulse Forming Network) and driver for integration into the 14 pin butterfly package DFB (Distributed Feedback) diode assembly. • Contributing member of the design team for the development of the GDRS Ladar analog interface, time of flight ranging, and readout ASIC. Designed ASIC substrate and wire bonding packaging topology for a .8mm pitch 289 pin 15mm x 15mm PBGA. • Designed a multitude of test circuitry and test fixtures in support of ASIC functional testing. • Designed TIA (trans-impedance amplifier) and CFA (current feedback amplifier) APD interface on for minimizing dark current along with reducing noise while sacrificing some Input Bandwidth. • Designed high speed Ladar 16:2 multiplexing receiver, PECL comparator detection and for TDC (time data conversion) chips. • Designed APD noise envelope detection circuitry to dynamically control a Low noise HV power supply for InGaAs APD array.



TTC/Acterna (JDS Uniphase)

• Sr. Electrical Engineer

  • Apr 2000 - Apr 2002

  Sr. Electrical Engineer- Senior member of a circuitry design team that designed TELCO test equipment. • Contributed as a member of design team for copper analysis test instrument that included POTS, ISDN, BERT, DVOM, Capacitance, resistive fault, TIMS, and TDR measurements using both the Mc68302 and TMS320c5X. This product enhanced Acterna's modular test equipment product line. • Designed xDSL spectral analysis enhancement for copper analysis instrument included LNA & variable Gain/attenuator Amps and enhanced FPGA & CPLD firmware to provide unique xDSL premise testability. • Designed synchronous DC/DC converters, integrated OC-3/12/48 optical SFF modules with RX/TX CDR circuitry for a hand held instrument modular platform as part of a new product line. • Designed power switching control circuitry for DS1 to OC-192 test instrument and FPGA core power supplies to optimize the product power distribution. • Performed design/analysis of critical circuitry for E1, T1, E3, DS3, and STS1 LIUs and associated PLL timing for improved jitter requirements using a Xilinx/Altera FPGA for an embedded synthesizer.



Denro Inc. (Northrup Grumman)

• Sr. Engineer

  • 1990 - 2000

  Sr. Electrical Engineer - Tasks included extensive multi-discipline circuitry design for Air Traffic Control voice/radio communication switches. Design enhancements used the TI TMS320c6711 fixed point DSP. • Developed Voice over Data module (Tellabs rack mountable) using standard TELCO 2 wire. • Designed CEPT audio ISDN controlled audio position for digital voice/data switch. • Designed audio/radio air traffic control position for FAA STVS (Small Tower Voice Switch) program. • Designed unique ROM based call progress tone generator for the same STVS program. • Designed modular Model 400D ISDN and I2C controlled oice/radio position. • Designed STbus/MVIP (similar to CEPT) digital audio modules for next generation voice/data switch. • Designed RED/BLACK audio isolation modules for distinct RED/BLACK digital voice/data switches. • Designed multiple line TCM telephone to integrate with Northern Telecom PABX (Meriden opt. 61 switch). • Designed 12 BIT linear selectable Wide/Narrow Band 4 port Universal device cards for Navy SCSS program, included BIT and used FPGAs along with high density CPLDs for data routing. • Designed Analog Devices 21xx DSP based cryptographic interface device cards with 16Kbps encrypted data routing, has unique CPLD circuit for 50% duty cycle correction to prevent TX/RX data corruption.



Tomtec Inc

• United States
• Biotechnology Research
• 1 - 100 Employee

• Electrical Engineer

  • 1986 - 1990

  Electrical Engineer - Machine control circuitry design for Medical Instrumentation that automated sample assay testing ,database entry, and diagnostics. • Designed 87C51 controlled quad dynamic PWM DC motor drives for robotic arm, contact barcode reader, 20 character Mc68705R3 based dot-matrix display driver, .1 PSI resolution pressure sensor, programmable chopper drives for Uni-polar and Bi-polar stepping motors that included stall detection circuitry, PLL optical transceiver for detecting small objects, and a liquid meniscus level sensor. • Designed generic Micro-controller control boards for medical machine control: these 8-bit board functions include 3 serial ports, expandable I/O drivers, seven 16 bit timers, eight 3 of 9 barcode readers, dual 12 bit DAC's for positioning up to 8 DC servo motors, real time clock, battery backed up RAM, stepper and DC motor control logic, and DC/DC converters.



EmhartCorp. (Glass Machinery Group)

• Electrical Engineer

  • 1985 - 1986

  Electrical Engineer - Circuitry design to improve glass forming machinery diagnostics and molding. • Developed 80C31 based circuitry for flow regulation of molten glass to a glass forming machine. • Developed control and diagnostic circuitry for unique glass barcode and dotcode sensors. Electrical Engineer - Circuitry design to improve glass forming machinery diagnostics and molding. • Developed 80C31 based circuitry for flow regulation of molten glass to a glass forming machine. • Developed control and diagnostic circuitry for unique glass barcode and dotcode sensors.



Sola Electric

• Electrical Engineer

  • 1982 - 1985

  Electrical Engineer- Circuitry design for AC power conditioning equipment and automated test equipment. • Developed Mc68705P3 based control circuits for AC line voltage Regulator. • Designed novel DC to AC inverter control circuitry and low distortion oscillators. • Designed DVM and bargraph power meter for single/three phase Power Distribution Center. • Designed hardware, software, and communication protocol for Mc68701 based ATE system the system included a FO (Fiber Optic) communication



Weinschel Engineering

• Electrical Engineer

  • 1973 - 1982

  Electrical Engineer- Circuitry design for microwave synthesizers, sweep generators, and step attenuators. • Designed 350Mhz divide by N counter and control circuitry, a programmable PLL filter, and power supply for IEEE/488 controller Microwave Synthesizer. • Designed RF power system including RF leveler, pulse amplitude modulator, and IEEE/488 controlled Microwave attenuator. • Designed control circuitry, RF multiplexer, and PIN diode driver for Microwave sweep generator. • Designed 1.25Mhz IF FLL and 195-205Mhz synthesizer for an automatic signal generator calibrator. • Limited design for support of Microwave test equipment in production.