Gabriel NicolescuSenior Electrical Engineer

Residence status: American Citizen

Contact:

• (408) 409 9414 (Cell)• (408) 372 4524 (Home phone)• gabriel_nicolescu@yahoo.com (email)• ADDRESS: 4809 Atherton Ave, #6

San Jose, CA, 95130

EDUCATION• MSEE, Electronics &

Telecommunications Department, Bucharest Polytechnic University, 1967 – 1972

• Major: Applied Electronics• EMI and EMC design and

troubleshooting, Seminar in NCEE Labs, Lincoln, Nebraska

PROFICIENCY

• DC/DC Converters: Full Bridge, Half bridge, Push Pull, Buck, Boost, Flyback, Forward

• DC/AC Inverters: pure sine output voltage• Class D Amplifiers: low distortion, various

topology

WORK EXPERIENCE SUMMARY• 2010-2015 AKROS SILICON

SENIOR APPLICATION ENGINEER• 2009-2010 MID-CONTINENT

INSTRUMENTS, WICHITA, KSELECTRICAL DESIGN ENGINEER

• 2008-1999 O2MICRO, SANTA CLARA, CA APPLICATION ENGINEER

• Previous ICPE-ACTEL, BUCHAREST, ROMANIASENIOR RESEARCH ENGINEER, HIGH POWER ELECTRONICS

AKROS SILICON San Jose CA• Reference Design for Akros Silicon IC (DC- DC and AC-DC

converters for PoE PD) applications. • Schematic design (ORCAD), BOM , interface with customers• Reference Design for Akros Silicon IC for any kind of non PoE

Application• Flyback and Forward converter, isolated or non isolated• Buck and Boost converters using AKROS SILICON controllers• Simulation in LTSPICE and PSPICE• Debugging the customers designs and PCB boards• Assisting customers who use Akros Silicon controllers from demo

boards to mass production• Supervising PCB layout • Bode plots graph recorded working with AGILENT 4393A network

analyzer• Bode plots graph recorded working with AP300 network analyzer

Notable achievements:• High efficiency flyback converter for 1W to

5W, up to 90%• High efficiency 60W and 90W flyback

converter• Flyback converter with very low input

voltage

MID CONTINENT INSTRUMENTS, Wichita, KS

• PROJECTS• 60Hz_1.2KW inverter for avionics (Input voltage is

20VDC to 37.5VDC and the output voltage is pure sine 115VAC/60Hz)

• 60Hz_500W Inverter for avionics (Input voltage is 20VDC to 37.5VDC and the output voltage is pure sine 115VAC/60Hz)

• 400Hz_375W Inverter for avionics (Input voltage is 20VDC to 37.5VDC and the output voltage is pure sine 115VAC/400Hz)

• 100W DIMMER for avionics (Input voltage is 20VDC to 37.5VDC and the output voltage is 0 to 28VDC)

Work done:• Full Design Concept• Schematic with PADS2007• Simulation with LTSPICE software• Fix stability issues• PCB design supervising (PADS2007)• Prototype evaluation and report• DO-160 and TSO-73 Qualification for the

60Hz_500W inverter

O2MICRO Santa Clara, CA• Main Projects: Current Mode Controller for high power DC-DC converter for CPU desktops

and servers.• Class D Amplifier.• Product Research, Definition, Interface between Design team, Business team and Customer• Target Spec Preparation• Proof concept simulation in PSPICE • Proof concept demo board with discrete parts: schematic (ORCAD), PCB design (PADS2004),

evaluation and report.• Engineering sample evaluation and report • Demo board built with engineering sample: schematic (ORCAD), PCB design (PADS2004),

evaluation and report.• Demo board addressed to the specific customer: schematic (ORCAD), PCB design

(PADS2004), evaluation and report.• Write and coordinate the activity up to the spec approval• User Guide and Application Notes• Work closely with Customers, Design Team, Business Management, Sales Team, Field

application Team during the life of the project• Other Projects (target spec preparation):• Controller for high power DC-DC converter for telecommunications equipment• Controller for step up/down converter for notebook• Charger for notebook battery• Power management IC for cell phone

ICPE-ACTEL-SA, Bucharest, Romania

• PROJECTS• Electronic control system for PWM thyristor inverter for short-circuited rotor

induction motors for electrical railway traction. Full concept, patent, design and qualification. Built with thyristors.

• Uninterruptible power supply for CENTRAL OIL RIG PLATFORM at Black Sea location. (6kW 110Vdc/220Vac). Full concept, patent, design and qualification. Built with IGBT.

• Electric Supply Unit for telecommunication equipment. Built with high power transformers and triacs. Full concept, patent, design and qualification.

• Highly experienced in electronic circuits design (discrete parts) to control high power inverters with PWM or other electronic control system, including DC/DC converter and DC/AC inverters

• Responsible for new designs transfer in manufacturing and official certifying of electronic products

• Glue-logic design for industrial automation• Application with International Rectifier components• Electronic control board for frequency static converter

PATENTS• Regulated Voltage Reducing High-Voltage Isolated DC/DC

Converter System (US 6,504,735 B2)• Electric Supply Unit for telecommunication equipment (RO 114852)• Changing Device for the electronic control system of PWM three

phases inverter (RO 106181/1993)• Electronic control system for transistors or thyristor inverter with two

working domains (Resolution 90/30.03.1987)• Thyristor inverter (RO 88378/1985)• Circuit rotor induction motor supplied by PWM thyristor inverter (RO

82390/1983)• Electronic control system for PWM thyristor inverter (RO

81377/1982)

COMPUTER SKILLS

• MS-Office Word and Excel• ORCAD family of products (CAPTURE

and PSPICE)• PADS2009 (Schematic and PCB design)• EXPRESSPCB (Schematic and PCB design)• LTSPICE