Switch Mode Power Supply Design

  • Buck/Boost/Isolated-Flyback/SEPIC/CUK/Resonate-Topologies
  • Custom Wound Transformer Design for Hi/Low Voltage Applications
  • High/Low Temperature Designs & Wide Input Voltage Ratios 4:1 or greater
  • Multi Quadrant Power Supply Design
  • Medical Grade Isolation meeting IEC-60601 MOPP/MOOP

Motor Control & Power Inverter Design

  • Brused-DC/BLDC/Stepper-Motor w/Encoder Feedback Closed-Loop
  • Cycle by Cycle Current & Total Power Limiting
  • Firmware-Based Thermal Control & Fault Detection
  • High Voltage Motor Windings for Sub-Sea & Down-Hole Applications
  • Large Ratio Transformer Windings for HV Flyback Design
  • Past projects include motion control for medical devices

Microcontroller Hardware Design

  • ARM 32-Bit (Including STM32F4 and all Cortex Processors)
  • NXP i.MX6/7/8 Arm Based Processors
  • Texas Instruments MSP430 Low-Power Devices
  • ATMEL 8, 16 & 32 Bit processors
  • Renesas Micro-Controllers, various families
  • Nordic Semi nRF52805, nRF52840, etc. Family of Bluetooth devices
  • Xilinx Zinq 7000 Ultrascale+ w/ARM Core & Linux OS
  • Altera Cyclone 10 w/DDR
  • CPLDs including Altera Max10 & Silego GreenPak
  • dsPIC Microchip & most families including PIC32 & 8 ~ 16-Bit Devices
  • Legacy 8051 Micro-Controllers using Assembly & C

Internet of Things (IOT)

  • WiFi (implementing Client & Host for versatile applications)
  • Modules including ESP32
  • Integration w/Web & HTTPS/SSL Security Certificates
  • Integration w/AWS IoT Core & FreeRTOS
  • Bluetooh 5.0 (low-power designs using Nordic, TI, Cypress PSoC and others)
  • Mesh (low-power and/or long-range) using:
    • Xbee (Digi), SmartMesh IP (Dust Networks) and others
  • LoRa & Mesh Networks & LoRa Gateways using:
    • Semtech IC’s & Laird Modules
    • Gateways from RAK & Multitech

Firmware Programming

  • Bare-Metal Programming in C & Assembly on many architectures including:
    • ARM Cortex-M0 ~ M4 & M7
    • Microchip PIC Families, dsPIC33, PIC16, PIC18
    • Atmel uC Families, ATtiny, ATmega, AVR DB, AVR DA, etc…
  • Extensive firmware experience with ST32M4 using ST32CubeMX & HAL
  • Linux Real-Time Treads, Inter-Process(er) Communications on the following:
    • TI PRU Co-Processor found in BeagleBone & TI Sitara AM335x
    • TI PRU-ICSS Industrial Software Libraries
    • ARM Cortex-M Co-Processor under Linux found in  STM32MP1
    • Octavo Systems OSD335x & OSD32MP15x

Digital Interface Electronic Design

  • CAN-Bus (with isolation and lighting protection)
  • RS-232 / RS-485 / RS-422 (with isolation and RTCA/DO-160G )
  • Ethernet, TCP/IP, UDP/IP, etc…
  • PWM (Pulse-Width Modulated) for motor control, cycle-by-cycle current limiting
  • SPI, I2C, SDIO, QuadSPI and parallel digital interfaces (Intel and Motorola Standards, etc.)

Analog Interface Electronic Design

  • Standard Industrial Interfaces
    • 0 ~ 10 Volt Inputs (isolated and non-isolated)
    • -10 ~ +10 Volt Outputs
    • 4 ~ 20 mA, and other non-standard analog current loops
    • Ultra-Low-Noise Power & uV or pA Analog Signal Detection
  • HART communication protocol, PROFIBUS-DP, Modbus
  • EtherCAT and other industry standard protocols
  • Analog Signal Conditioning, (Low-Pass, High-Pass Filters, etc.)
  • Ultra-Low-Noise Analog Front End including Trans-impedance Amplifier TIA
  • High-Speed/High-Resolution Bi-Polar, Differential ADC w/FPGA Integration
  • Closed-Loop control, PID, etc…

PCB Layout

  • Mixed Signal Analog/Digital/RF
  • RS-232 / RS-485 / RS-422 (w/isolation and RTCA/DO-160G )
  • UL & TUV Certification
  • IPC Standards including IPC-2221
  • High Voltage (multiple kV) & High Current (hundreds of Amps)