Cheuk Kwan (CK) Lui

Experienced Electrical Engineer 6536 Broadway, Burnaby, Canada V5B 2Y5

778-968-6812 | cklui99@yahoo.com

Professional Summary
Over 15 years of experience in Wireless Products, Mixed-Signals Board Designs with Hardware and Firmware
Development with hands on experience on all phases of a product development cycle, including system architecture
circuit design, schematic capture and PCB layout using CAD tools, and Gerber releases; prototyping with board bring-
up, firmware programming, design validation and testing; and new product releases to production.

Technical Skills
Wireless Products: US/European CT0 / 900MHz FHSS cordless telephones, US DECT6.0 Cordless Phone
integrated with EMTA, BT4.0 Personal Security IoT, BT5.1 Sensor Device
Technologies: FM / FSK / spread spectrum, DECT6.0, WiMedia UWB, BT LE 4.0/5.1, WiFi 6
Hardware Freescale / NXP: i.MX 8M (ARM Cortex A53) processor
Platforms / Texas Instruments: AM335x Sitara (ARM Cortex A8) processor, TLV320AIC3105 audio CODEC,
Interfaces TDP158 HDMI 2.0, SN65 LVDS Switch, TPS65217 PMIC, CC2540 BLE SOC with 8501 uP
Lattice: iCE40 LP / HX FPGA
Microchip: LAN8710A, AVR, PIC uPs
Micron: MT40A256M16 DDR3, MT53E1G32D2FW-046 LPDDR4
Nordic: nRF52840 SOC, nRF52840 DK
Interfaces: DDR3/LPDDR4 SDRAM, SPI, I2C / TWI, SMBus, 10 / 100 / 1000 Ethernet, SGMII,
RGMII, S/PDIF, SDIO, NAND/NOR FLASH, EMMC5.1, SD Compact FLASH Reader, RS232, RS485,
CAN, USB-C, PCIe4.2 Memory interface
Audio / Video: I2S, CODEC, ALSA, AC3 5.1 Dolby virtual surround; RGB, VGA, DVI, DisplayPort,
LVDS, HDMI; 8K Monochrome LCD, TFT color LCD, 7-segment module
Power: DC-DC Buck / Boost / Flyback, LDO, PoE, Battery Balancer & Power Management
Standards: I2C, MIPI I3C, BT Core 4.0, BT LE GATT, WiMedia UWB, IEEE802.3 / 802.11 /
802.15; UL, FCC Part 15 & 68, IEC-61000 EMC / ESD
Design Tools Schematics: Altium, Mentor Graphics PADS, OrCAD
Layout: Mentor Graphics PADS, Altium, OrCAD
HW Tools: PADstack editor, Gerbv Gerber viewer; LTspice, Pspice, Webench, SI HyperLynx
FW Tools: TI Code Composer Studio, MS Visual Studio Code, IAR Embedded Workbench,
Eclipse IDE; VMware, VirtualBox, TeraTerm, Git, SVN; iCEcube2, Active-HDL for FPGA
Embedded FW: Docker, Yocto, Bitbake, device trees, I/O PINMUX, interrupts, timers, boot
loader, multiple banks memory, EEPROM, ADC, SPI / I2C / 1-Wire, LCD controls; DSP – FIR
digital filter, FFT tone detections, arbitrary signal generation; JTAG; C/C++, assembly, Python;
php, html, Json; Linux shell scripts, LabVIEW / LabWindows / Testbench;
Others: Mathcad, MATLAB and Opnet, Altair® Feko
Test Equipment Spectrum Analyzer, VNA analyzer, Digital Oscilloscope, Logic Analyzer, Digital multimeter,
Signal Generator, BLE Sniffer

Professional Experience – Contracting / Short-Term Projects & Full-Time Employments

Senior Hardware Engineer (Full-Time) – L&T Technology Services, @Emerson, Houston, TX May 2024 – Dec 2024
• Designed and reviewed circuits with other hardware contractors a high-speed cpu board using latest ARM Cortex
A53 processor; validated layout design on stackup, impedances for high-speed buses, lpddr4 timings.

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 • Performed lpddr4 calibration, device trees setup, board bring up platform using docker, Yocto and bitbake to
build firmware image.
Senior Hardware Engineer (Full-Time) – Brickred Systems LLC, on-site @Microsoft, WA Apr 2022 – Mar 2023
Firmware Engineer (Remote Full Time) – Brickred Systems Inc., remote @Microsoft, WA Feb 2021 – Apr 2022
• Designed and released firmware in C for Bluetooth Low Energy (BLE) sensor projects, including a project with
periodic sensor data notification between multiple slaves and a master, and inter-processors communications
• Developed and debugged firmware using BLE development boards, SEGGER J-Link debug probe, digital storage
oscilloscope, JTAG and SWD interfaces for debugging and programming; released source codes to GitHub
• Designed system circuits and PCB layouts on Altium Designer for BLE, Motor Drive, and High-Speed Mixed Signal
Communication projects
• Evaluated 8K resolution Mono-LCD using vendor provided driver and HDMI port on PC laptop
Construction Helper (Temporary Part-time Project) – Vancouver, BC 2020
• Completed project assignments in residential renovation projects
R&D Hardware Engineer (3-year contract) – Webb Electronics Inc., Burnaby, BC 2015 – 2018
• Designed and released prototype boards of a battery backup system, as I2C slave device, to monitor the backup
system status for phones and other networking devices – released the firmware coded in C
• Designed and released prototype boards of a cape with phone features using CODEC and with interfaces to PSTN
network and IP network; involving processor port assignments for device tree setup in Linux kernel, CODEC audio
controls setup and digitized audio channels setup using I2S interface, and acoustics levels adjustment using ALSA,
feasibility studies on real time processing telco tone signals using software approach; telco tone detection using
A/D, FIR digital bandpass filter and FFT frequency analysis; DTMF tone generation using PWM pulses
• Designed with coding the FIR digital filter and FFT tone frequency detection in C; and created Linux device tree
and kernel drivers for board bring-up
• Designed and created product prototype boards of an integrated VoIP and PSTN analog phone with ARM Cortex
A8 processor; worked with the layout contractor for the PCB stack up and design a 6-layer board; involved board
bring up using u-boot sources and DDR3 SDRAM calibration using vendor supplied tools; applied Hyper Lynx
simulation on DDR3 traces using IBIS models provided by vendor; and LTspice simulation for designing acoustic
and filtering frequency responses
• Performed feasibility study of a digital communication device over twisted pairs with coding FPGA design for the
coder using Verilog and Active-HDL for logic simulation
• Debugged and resolved issues on LVDS video signal converter from outside contractor on video signal routing and
controls
• Performed feasibility study on converting video signals from LVDS to HDMI output to monitor display
• Debugged and resolved interface issues on 7-segment display on the production units
• Resolved field deployment issues include ground isolation, VoIP gateway setup, and IP traffic blocking – authored
and released VoIP gateway setup document to system installers
Research Engineer, Hardware (5-month contract) – Cadex Electronics Inc., Richmond, BC 2015
• Applied LTspice for circuit designs and simulations – completed schematics hierarchical designs using Altium
Designer for the solar power converter board using ARM M0 and various communication interfaces including
CAN, LIN, I2C, SPI, SMBUS, 1-Wire; and the battery cell management system module
• Re-designed a surge suppressor power module, and resolved thermal issue in steady state operation
• Resolved firmware coding bugs of an USB 2.0 communication interface of a released product, using digital
storage oscilloscope and USB 2.0 technical specifications to debug the issue on the captures data packets
• Performed system bring-ups and parameters measurements of new products

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Contract Product Developer (7-month contract) – Linquet.com, Vancouver, BC 2013
• Completed and released a 2-layer PCB design with a microstrip antenna and an embedded firmware in C to
implement the client’s product features including a power management scheme to maximize a battery life, a
GATT services profile for a protocol to communicate with iOS or Android mobile apps, and over the air firmware
download – successfully delivered prototype samples to the client
• Participated in debugging system integration issues using packet sniffing techniques based on Bluetooth
specification 4.0, to assist mobile apps developers to resolve real time issues during apps developments
• Resolved mechanical system integration issue
Contract PCB Layout Designer (3-month contract) – Vancouver, BC 2013
• Created a 4-layer mixed signals PCB using Mentor Graphics PADS for layout design and the netlist released from
client – prepared and released parts, Gerber files, BOM and instructions to CM for PCB fabrication and assembly –
successfully delivered prototype samples to the client
Self-employed – Vancouver, BC 2009 – 2011
• Performed business setup including server, website and database for a non-engineering business
Senior Staff Digital Design Engineer – Motorola Inc., Horsham, PA 2007 – 2008
• Performed design verification and functional testing of the integrated EMTA system with provisioning a cable
modem and establishing the VoIP services with a DECT 6.0 VoIP cordless phone that contains a TFT color display
for user application data; prototyping supports on JTAG flash and I2C EEPROM programming, and building final
product samples for marketing sales
• Drafted and released a Product Requirement Documentation to Marketing and ODM; involved design core team
discussions and phase-gate design meetings
• Organized and chaired quality review meetings with international teams
• Investigated quality issues with ODM and firmware team; and technically advised the ODM to resolve LCD
module and system design issues including audio noises, memory data access timing, battery power management
• Managed the acoustic testing laboratory and performed the equipment calibration
Application Engineer – Alereon Inc., Austin, TX 2005 – 2006
• Designed a WUSB Hub reference design with ethernet connection on schematics using ORCAD
• Performed power envelop measurements on transmitting UWB channels using R&S CMW500 wideband radio
communication tester and s-parameters measurements using HP network analyzer
• Supported oversea customer to bring up UWB eval boards and CompactFlash WUSB on Linux platform
• Attended WiMedia UWB radios interoperability events at Hillsboro Intel campus
Test Program Developer (3-month contract) – Alpha Technologies Ltd., Burnaby, BC 2004 – 2005
• Resolved UPS ATE manufacturing test issues with HW updated – released LabWindows software in C
PCB Layout Designer (3-month contract) – Vancouver, BC 2004
• Created a 4-layer PCB using ORCAD for the short-range RF device using a schematic net list from the client
• Prepared and released parts, Gerber files, BOM and instructions to CM for PCB fabrication and assembly –
successfully delivered prototype samples to the client
Electrical Engineer – Alpha Technologies Inc., Bellingham, WA 2001 – 2004
• Designed micro-controlled or computer-controlled ATEs, including low / medium / high power testers for PCBA
and system tests, for new released Alpha products – Successfully delivered more than 6 sets ATE for ELH,
FlexPoint, Alpha Guard multi-unit burn-in station, ECM, USM2.5, eDSM, and 3.5kW Photovoltaic Inverter with test
plan documents in ISO 9000 system

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 • Design activities involving system and board designs; programmable logic controls (PLC) designs with micro or
computer-controlled boards and relay switching using AC / DC / HV relays; power source designs with
programmable power supplies; load bank designs with linear or non-linear loads; battery charging and
discharging simulating setup; embedded programming in C or assembly with Motorola HC11 / Microchip
PIC16F87X / Renesas H8 micro-controllers for simulated signal generation, digital controls and detections, user
interface (UI) on 7-segment display, LCDs or LEDs; test programming in LabVIEW, TestStand, or Visual C++ in
Windows
• Participated daily maintenance of ATEs, project scheduling and budgeting for development projects under the
supervision of the director or the vice-president during the absence of a team manager for more than 2 years
Hardware / System Engineer – LinuxDA Inc. / Amipo Technologies Ltd., Richmond, BC 2000
• Designed AC3 5.1 Dolby virtual surround decoder and evaluated system performance using Audio Precision to
measure signal to noise (S/N), Total Harmonic Distortion (THD), and audio frequency response of each decoder
output channel – Successfully released AC3 5.1 Dolby virtual surround decoder board to customer for evaluation
• Involved UL / CSA / Dolby certifications for products of Amipo
• Worked on system design for Personal Digital Assistant (PDA) and evaluating uClinux; assisted Linux development
team to review coding issues
Senior Hardware Engineer / Team Lead – Arkon Technologies Inc., Richmond, BC 1994 – 1999
• Designed baseband PCBs for US 10/25-channel at 43/49MHz cordless telephones with / without analog / digital
answering devices – Successfully released products to US and Canadian markets
• Designed VHF FM/FSK transceiver and baseband PCBs for European CT0 cordless telephones – Successfully
released products to European markets with overwhelming sales in Spain
• Designed baseband PCBs for US 900MHz Frequency-hopping spread spectrum (FHSS) cordless telephones –
Successfully released products to US market
• Designed PCB for US Caller ID device for marketing demo
• Baseband designs involving PSTN subscriber loop interface, LNA with filtering, battery power management,
embedded microcontrollers, digital signal processors (DSP), Pulse-code modulation (PCM) audio CODEC, A/D or
D/A conversions, EEPROM / AFLASH / ARAM memory, LCD interface controls
• FM transceiver design involving LNA, phase lock loop (PLL) voltage-controlled oscillators (VCO) using Colpitts
oscillators for multi-channel systems, or with crystal oscillators for single-channel systems; modulation and
demodulation frequency modulation (FM) audio and frequency shift keying (FSK) data; link budget calculations;
performed RF signals measurements and noises debugging inside a RF shielded room using HP 8920
communication tester, HP network analyzer and HP spectrum analyzer
• Participated system integrations, product prototyping and pre-compliance testing including FCC part 68, and
Bellcore specifications for the PSTN line interface and signaling; FCC part 15 for RF performance; UL 1459 for
product safety; IEC-61000 for EMC / EMI, electrostatic discharge immunity

Education
Master of Engineering in Electrical Engineering
Simon Fraser University, Burnaby, BC
BSc in Electrical Engineering
California State University, Fresno, CA

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