Engineer Electrical

David Liu

**** **** ******* *****

Plano, TX ****4

972-***-****

**********@*****.***

QUALIFICATION HIGHLIGHT

Well versed in all aspects of digital, analog and electromagnetic

technology, and their applications in solving problems and meeting custom

requirements.

. Digital and analog design - Discrete logic, floating point multiplier

and accumulator, peripheral interfacing, video LVDS, system

integration, filter algorithm implementation, FIR, IIR, LP/HP/BP/BS,

CIC, sampling rate converter, bilinear transform, Butterworth,

Chebyshev and Sallen-Key topology.

. Test automation and instrumentation tools utilization - LabVIEW,

TestStand, Cadence (Capture, PSpice, Layout),Time Interval analyzer,

Audio codec analyzer, logic analyzer, network analyzer, digital

oscilloscope, function generator, source meter, transformer analyzer,

environmental chamber and shaker.

. Lab skill - Schematic entry, board layout, mixed signal

characterization, design validation, timing, transient, linearity,

distortion, noise, jitter, impedance measurements, root cause

analysis, prototype, debug, troubleshooting, test fixture fabrication,

and I2C, I2S protocol analysis.

. Magnetic design - Switching power supply, AC/DC and DC/DC converters,

power and signal transformers, inductor, choke, Ethernet transceiver

adapter, magnetic component modeling, spectrum and impedance analysis.

. In-depth knowledge - Signal processing, image processing, filter

synthesis, DFT, FFT, DCT, spectral analysis, jitter noise analysis,

sampling and reconstruction, anti-alias, statistical and data

reduction, feedback control, and telecommunication.

. Software design - Application design, neural network, algorithm

development, speed optimal assembly coding, serial and parallel

peripheral communications, and instrument automations.

WORK EXPERIENCE

1. Mixed Mode Characteristic Engineer, Texas Instruments, Dallas, Texas,

2006 ~ 2009

Responsible for the characteristics of custom ASIC and assist designer to

debug hardware; analyze requirements, define test plan, procedure, script,

equipment to be used; perform functional, parametric, bench and design

validation testing.

. Developed Real Time Clock jitter noise analysis through time series

period captured, data manipulation and transfer to frequency domain to

extract jitter noise components and comparing with baseline instrument

signal source results.

. Conducted Codec characterization in PGA gain linearity, THD, noise,

transient, PSRR and CMRR to assess results with specification defined

by customer.

. Designed test hardware boards, and developed related TestStand

sequence and device scripts per customer requirements.

. Performed sophisticated data acquisition - codec transient waveforms

(ramp, pop and click) - with high resolution Audio Precision analyzer

for chip designers to correlate to custom specifications.

. Implemented test fixture for cellular phone charging current ADC

linearity measurement with minimal parasitic resistance.

. Designed specific test configurations for chip designers to verify

simulation against bench environment.

2. Hardware Design Engineer, GCI, Plano, Texas, 2002 ~ 2006

Responsible for the custom magnetic component design, manufacture, and

testing of power transformers, inductors, common-mode chokes, EMI

filters, DSL and LAN modules.

. Developed specific winding techniques and circuit optimization to

achieve higher efficiency and lower EMI emission for the switching

mode ac/dc and dc/dc converter design.

. Built RF balanced test fixtures to accomplish higher accuracy and

minimal stray effect S-parameter measurements for RJ-45 and LAN

modules.

. Conducted fault analysis and constructed test setup to inject

stimulate that revealed imperfections in electrical and physical

characteristics.

. Developed nonlinear fitting software to extract model information from

the magnetic component impedance parameters with minimum errors

compared with the equivalent function built with the instrument.

3. Software and Test Engineer, Ericsson, Richardson, Texas, 1999 ~ 2001

. Located system level faults for the Voice over Internet system through

simulated traffic and test scripts, and report to design team.

. Verified the functionality and performance of the Internet calling

system involving the telecommunication switch and signaling

controller.

. Designed management program to facilitate calling statistic analysis.

4. Electrical Engineer, DCI, Plano, Texas, 1996 ~ 1999

. Developed rugged computer systems for use on aircraft, ships, and

trucks.

. Involved in all aspects of hardware design, prototype, board layout,

system integration, testing and documentation.

. Designed a special purpose temperature and voltage sensing

control module for the mobile computer systems.

. Designed LVDS video interface and dual port mouse control in an

aircraft on-board system.

5. Research Assistant, University of Texas, Arlington, Texas, 1991 ~ 1995

Research Assistant, University of Arizona, Tucson, Arizona, 1983 ~ 1984

. Developed new neural network architecture of trigonometric activation

and derived minimization algorithm to solve image identification and

artificial intelligence applications.

. Developed a segment of AHDL compiler to convert the MSI chip structure

into net list form for the digital circuit design and simulation.

6. Test Engineer, Datawest, Scottsdale, Arizona, 1976 ~ 1978

. Developed a test fixture and test program to thoroughly exercise the

functionality of digital modules for array processor (IBM 360

coprocessor) to isolate design and prototype flaws.

. Worked with digital modules encompassing floating-point multiplier,

arithmetic logical unit, and data multiplexer.

7. Research Assistant, Chief Engineer, Institute of Nuclear Energy

Research, Taiwan, 1972 ~ 1991

. Responsible for troubleshooting and maintenance (down to the component

level) a variety of computer-controlled equipments, including

chemistry analyzer, spectrum analyzer, process control, data

acquisition, and filament winding machine.

. Responsible for the field maintenance of concrete batching computer

system for the construction of Third Nuclear Power Generation Plant.

. Responsible for the site maintenance of Westinghouse data logger in

nuclear reactor monitoring system to sustain system in normal

operation.

TRAINING

Variety of digital signal processing, signal integrity, instrumentation and

interfacing courses (Texas Instruments, Hewlett-Packard, CalComp, ORTEC,

and Honeywell), and numerous training courses in mixed signal, voice, data

communication and telecommunication switches (Ericsson).

EDUCATION

Ph. D, Electrical Engineering, University of Texas, Arlington, Texas, USA,

1995

MS, Electrical Engineering, University of Arizona, Tucson, Arizona, USA,

1984

BS, Electrical Engineering, Chung-Cheng Institute of Technology, Taoyuan,

Taiwan, 1970

LEGAL STATUS

U.S. Citizen.

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