Design Engineer Power
Resume:
Laszlo Juhasz
OBJECTIVE
Looking for a Senior Electronics Design / Chief Engineer Position.
HIGHLIGHTS
Multi-phase switching and linear inverter design and implementation up to 65kVA.
Offline Switching PS design up to 1000W using the Fly back, half and full-bridge topologies using MosFet and IGBT power devices.
Improved the performance and reliability of existing power converter and amplifier products by applying state of the art technology.
Designed switch mode and linear Hi-Fi Audio amplifiers up to 1000W.
Developed Hydrophones for medical and military use.
Designed and developed special communication and alert devices.
Wide range of experience in Analog, Digital, RF and Power electronics designs.
Firmware and code development for microcontrollers and other digital devices.
Fabricating in house PCB for layout critical design verification.
Traveled to South East Asia and Europe: M.L. China, H.K., Taiwan, France (Thales) to provide technical trainings and work with vendors on design references and products.
Designed special computerized hardware and test fixtures for mass production.
Excellent communication, presentation and interpersonal skills.
EDA, Tools: Multisim, Tina, Protel (Altium), OrCad, Cadence, Allegro, Assembly, C and Basic programming skills.
DESIGNED HARDWARE
Power Supply, Power Regenerator, Light Control Devices:
IGBT Light Dimmer with IR Remote Control and Touch Sensors
AC Power Line Active and Passive Filter
UPS System for Network Power
Frequency Converters, Inverters
IP Controlled Power Port
AC Power Regenerator
Medical devices:
Patient Monitoring Device (Pulse Rate, Blood Oxygen Level)
Blood Transfusion
Nurse caller
Endoscope
Doppler
EKG
Assistive devices:
Amplified Telephones (50dB) Using patented soft switching technology
Mobil Telephone Amplifier(35dB with Neck loop feature)
Advanced Answering Machine with ISD Technology
Speech synthesizer and voice prompt telephones
Teletype Telephones(TTY, VCO, HCO)
Amplified Cordless Telephones (40dB)
Brail Writer/Reader
Emergency Alert Devices:
Encrypted Emergency Fax Alert System for FEMA ( TI’s Fax DSP)
911 Call Console for TTY, HCO, VCO procedure
Video Surveillance and Automatic Recording
LA Fire Department Dispatch Center
Blood Oxygen level sensor
Human Fall Sensor
Baby Monitor
Test Equipments:
Audio Function Generator and THD+N Meter
AM/FM Radio Tester (PLL synthetized)
Computerized Filter Tester
AC Power Line Analyzer
Marketing Demo Tools
Spectrum Analyzer
Oscilloscope
Hi-Fi Audio Devices:
Class “D” Power Amps with PWM and PDM(Sigma/Delta Modulator)
Phono, Pre-Amps (Transistor and Vacuum Tube)
Computerized Subwoofer Designer (DSLAM)
Preamplifiers with Gain Cell and VCA
Class A/B Power Amps >1000W
Wireless Speaker System
SOFTWARE
Schematic Capturing and PCB Designs:
Protel EDA
TANGO
ORCAD
PCAD
PADS
Specialized fabricating in house double sided PCB <10 mil trace for microscopic SMT components for quick prototyping and fast design tweaking and verification.
Design Verification:
MATLAB
Multisim (EWB Pro)
PowerEsim
Programming and Other Computer Tools:
BASCOM AVR For Microcontroller Programming
MS Office, Corel Office, Corel Draw
SoftWire For GUI Applications
AVR Studio(Assembler)
Visual Basic, .NET
C Compliers
Autocad
Solidworks
Cool Edit
MPLAB
QBasic
PROFESSIONAL EXPERIENCE:
Electronics Hardware Engineer 5 (Remote)
HAAS Automation (Oxnard, CA)
03/20– Present
Designing Regenerative Braking Systems and Digital Motion Controllers for CNC Machines.
Principal Electronics Design Engineer
RiskBand. (Louisville, CO)
05/19 – 02/20
Designing/Fabricating evaluation and test platforms for Audio, Video, Battery efficiency noise immunity and EMI performance improvements of wearable devices.
Completed and released a six-layer fine pitch (400um 96pin BGA) PCB design with BT, WiFi, GPS, 4G LTE and Accelerometer features.
Lead Power Electronics Engineer
Alpha Technologies. (Bellingham, WA)
11/18 – 4/19
Designing/developing a 1600W high efficient UPS System for Network Power.
Mentoring and training younger engineers and helping them to improve the skill sets they’re having.
Working on new and unique patentable technologies for power electronics applications.
Lead Design Engineer, Safety Manager (Power Electronics)
Exide Technologies. (Milton, GA)
06/15 - 11/17
Improved existing three phase high power battery charger performance, reliability and efficiency.
Designed ultra-low power and EMI High Voltage (1kV to 24V) DC/DC isolation converters for Housekeeping Power Supply.
Designed patent pending multiphase converter module using IGBT, Si, SiC and GaN devices.
Lead designer of safety and data communication features of high power Battery Management Systems.
Travels nationwide and internationally to conduct auditing at global manufacturing divisions.
Senior Design Engineer (Communication, Power)
Scientific Drilling International, Applied Technology. (Paso Robles, CA)
07/13 - 05/15
Designed down-hole precision gyroscope based navigation systems, formation analyzer sensors and equipment.
Redesigned miniature gimbal servo motor loops and H-Bridge drivers. Designed and improved down-hole RF and pulsed communication systems.
Mentored interns and supported various engineering groups where RF, Analog, SMPS and magnetics skills were needed.
Used Altium EDA and various modeling and simulation software as well.
Electronics Design Engineer (Power, Communication)
SandC Electric Co. (Alameda, CA)
11/11 - 02/13
Designed Digital Actuator Controllers,HV Power Supplies, Battery Chargers for Power Line Switchgear (Intellirupter) Systems for Utility, Renewable Energy and Smart Grid Applications . Improved reliability and reducing the cost of existing designs.
Prepared Test Plan and schedule for prototypes of circuit boards.
Tested and troubleshoot new designs and design improvements on ongoing projects.
Corrected PCB layouts for HV clearance and reducing EMI.
Performed DFMEA on redesigns and improved designs.
Ran simulations and design verifications, evaluated component derating.
Used OrCad(Cadence and Altium EDA)
Electronics Design Engineer (Power)
Pacific Power Source (Irvine, CA)
03/09 - 11/11
Designed High Power Frequency Converters, Inverters, Up to 60kW for Government Systems, Commercial Test Applications, Renewable Energy Programs and Railroad Signaling, Using Linear and Switching Technologies.
Designed industrial Lead Acid Battery Charger (+-200VDC BUS) for railroad, laboratory and hospital UPS application.
Used OrCad and Altium EDA for SCH capture and PCB layout.
Modified existing products to be compliant with Aviation and Military specs and providing reliable source for high power battery charger testing.
Traveled to Thales (Paris) to set-up, conduct and document Aviation testing.
Wrote functional descriptions and test plans and procedures.
Electronics Design Engineer for Government Systems
Sparton Medical Systems (De Leon Springs, FL)
05/08 – 02/09
Worked together with Johns Hopkins University Scientists and developed new sonar and radio communication technologies for Government Systems.
Developed PVDF based Sonar Sensor Elements and Ultrasonic Instruments.
Frequently traveled to Washington DC for group meetings.
Wrote Proposals and Power Point Presentations.
Developed Communication Firmware for Microcontrollers, used in digital navigation systems.
Developed PC GUI for Navigation Hardware Testing.
Designed ultra-low noise instrumentation amplifiers for Hydrophone and Doppler.
Designed high power SMPS (DC/DC) and Class “D” Power Amps for active sonar applications.
Director of R&D
PS Audio International (Boulder, CO)
09/03 – 04/08
Designed and developed Class “D” PWM and PDM Power Amplifiers >500W.
Improved reliabilities of existing amplifier and power designs.
Developed Computer Controlled AC Power Line Analyzer hardware and software. Using Microcontrollers, RF detection, PLL controlling and PC GUI.
Designed and developed IP Controlled Power Filter and Power Ports.
I was a recognized technical advisor for reviewers and magazine publishers.
Attended Trade Shows as onsite technical expertise.
Traveled internationally, coordinated design groups in Europe and Asia.
Organized and coordinated Asian mass production.
Designed and built special tools and fixtures improving production.
Trained tech staff for more efficient way of testing and troubleshooting.
Mentored and supervised UC Interns.
Directed and supervised alpha production.
Organized outsourcing jobs to PCB and assembly houses.
Designed and fabricated mechanical parts.
Designed backlights and front panel control illuminations.
Used latest technologies such as touch sensors, MEMS, Delta Sigma Modulators.
Designed SMPS with PFC.
Designed wide range DC/DC power supplies for light dimmer applications and offline voltage sources.
Worked on product regulatory approval (FCC, UL, CSA, and CE.)
Chief Engineer
Ameriphone Inc. /Plantronics (Garden Grove, CA)
04/95 – 08/03
Designed and developed high gain award winning Analogue Telephones for Government State Programs.(50dB receive gain)
Worked with GSM Applications
Designed and developed Cordless Amplified Telephones (900MHz-2.4GHz)
Designed and developed Mobil Telephone Amplifiers for Hearing Impaired.
Designed and developed Information Storage Devices based answering machine with special features. (PLL controlled record/play speed, etc).
Designed 911 Call box for TTY, HCO, and VCO call procedure.
Designed and developed with a group of six engineers a dispatch console for the LAFD using Intel Microcontrollers, DSP, Graphic LCD and specialty telephone switching circuits.
Designed call alert devices for the elderly, such as fall sensor, pulse sensor and panic button activated telephone devices.
Designed and developed telephone assistive devices such as ring detector, neck loop, telephone amplifier, headset amplifier, outgoing voice amplifier. Speech synthesizer.
Worked on fall and blood oxygen level sensor devices with Sandia National Labs scientists.
Designed and developed Freeway Call Box and TTY equipment.
Traveled internationally, coordinated design groups in the US and Asia.
Organized and coordinated Asian mass production.
Designed and built special tools and fixtures improving production.
Trained tech staff for more efficient way of testing and troubleshooting.
Organized outsourcing jobs to PCB and assembly houses.
Designed and fabricated mechanical parts.
Worked on product regulatory approval (FCC, UL, CSA, CE, and TelMex.)
Design Engineer
TIBI Electronics (Santa Ana, CA)
09/88 – 04/95
Designed and developed Hi-Fi Phono and Preamplifiers.(J-Fet, and Vacuum tube)
Designed Class A/B Power Amplifiers >1000W with digital Bias control and protection Using Transistor, Tube and MosFet power stages.
Designed Car Audio Amplifiers with DC/DC converters.
Designed automated and computer controlled test devices and fixtures for mass production.
Design/Test Engineer
Philips Consumer Electronics (Munich, Germany)
05/87 – 08/88
Designed and developed special test fixtures for automated laser head alignment on CD Players.
Designed and developed automated test and tuning platform for radio tuner production.
GEM Electronics/Fastron (Hungary)
Technician/Design Engineer
06/78 – 04/87
Designed and developed Test Equipment’s such as Oscilloscope, Frequency Counter, Audio Generators, PLL Controlled RF Generators.
Designed and Developed medical devices such as Blood Transfusion, EKG, Nurse Caller, Doppler and Patient Monitoring.
EDUCATION
Institute of Physics and Technology, Communication and Radar Engineer,
1983 Budapest (Hungary)
SPOKEN LANGUAGES
English, German, Hungarian
U.S. Citizen Since 1994
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