Short presentation

David Ljungman is working as hardware designer at Ljungtech AB in Viken, Höganäs. He possesses a broad knowledge base and is comfortable within both hardware and software.
David is easy going and easy gathers a network on his workplace. He is ambitious and creative in his problem solving and he takes great pride in delivering on time.
David has been working in the IT business since 2006. David lives in Viken, in the southern part of Sweden and in his spare time he enjoys fishing, hiking and work-out.

Education/background

Luleå University of Technology; 2006
Master of Science in Electrical Engineering, specializing in Signal Processing. A selection of courses from the degree is: Analogue and Digital Electronics, Signal analysis, Audio Signal processing, DSP-systems, Real-Time Systems, Program and Data Structures. Computer organization and Logic Design,
 
Employments

• Ljungtech AB; 2017-06 – ongoing
• Lundinova AB; 2010-10 – 2017-05
• Teleca Sweden AB; 2006-08 to 2010-09

 
Areas of Expertise
Digital and Analogue Hardware Design, Antenna design, Micro strip filter, RF design, EMI/EMC, Battery management, USB hardware, Miniaturization, Mechanical design, Systems Development, Systems Integration, Systems Design, Project management, DSP-processors and Micro-controllers, Production testing, High volume production
 
Program languages/Operating system
Assembler, Embedded C, Java, MATLAB, Octave, Linux/UNIX
 
Development tools
Altium Designer, LTspice, Qucs, Sonnet, AWR Microwave Office, Fusion 360, Geomagic design, SolidWorks, SPICE, ClearCase, Visual Studio, AKABAK, SoundCheck from Listen INC, Laboratory equipment, network analyzer, spectrum analyzer, oscilloscope, etc.

Past Projects/Experience

• ASIC verification tool (2022)
  Hardware design of ASIC verification board.
  Technologies: Altium, Creative component usage.
  
  
• Production test system (2022)
  Design and manufacturing of hardware for production test system.
  Technologies: Test fixtures, M-CAD (FreeCAD), PCB-layout, 3D-printing.
  
  
• Power supply (2022)
  System and hardware design of 125W multi-rail power supply for modular production test system.
  Technologies: Power conversion, circuit protection, linearization of control loops, USB, PCB Layout. M-CAD
  
  
• System review (2022)
  Review of RF system design for entry control system and making proposals for improving overall RF performance.
  Technologies: WiFi, Bluetooth, Antenna design, Diversity, Link budgets, regulatory standards, FCC, CE.
  
  
• IoT Sensor system (2021)
  System and Hardware design of level sensor system. Evaluation of sensor performance on different materials. NFC-tag antenna design. Ultrasonic lens design. Low power system design and battery selection.
  Technologies: Optical ToF, Ultrasonic, mmWave Radar, Acoustic simulations, NFC, LoRa, NBIoT, Battery technology, Low power design. Mechanical design, E- and M-CAD Fusion 360, 3D-printing, DFM.
  
  
• Multiplexer board (2021)
  Hardware design of multiplexer board for ASIC verification.
  Technologies: High speed data, HDI PCB-design, PCB Layout, Altium.
  
  
• RF Power Amplifier (2021)
  System and Hardware design of 100W 915GHz power amplifier.
  Technologies: RF-simulation, Transistor Matching, PLLs, Microstrip structures, PCB thermal management, EMC.
  
  
• NFC reader (2021)
  Bring up of NFC reader and NFC antenna tuning.
  Technologies: NFC, Network analyzers, Smith charts.
  
  
• Hardware architect at Verisure Innovation AB (2016 - 2020)
  Electronics design lead for products intended for alarm systems.
  Responsibilities: Deliver electronic designs with high reliability to low cost and adopted for mass production.
  Technologies: NFC, Touch, Sensors, Production setup, Production test systems, Antenna design, Battery technologies, Low power design, ECAD, Regulatory certification.
  
  
• Cost control (2016)
  Cost optimization of consumer product to enable competitive pricing with maintained quality on a demanding market.
  Responsibilities: Review system design, component selection, PCB-design and manufacturing from a cost perspective. Implementation and bring up of improved system design.
  Technologies: Cellular modems, Sub GHz radio, DECT, MCU selection, Battery charging, NiMH batteries, low power design, price negotiations
  
  
• User identification system (2016)
  Identification system based on NFC to identify machine operator in medical device.
  Responsibilities: Component selection and RF design.
  Technologies: NFC, Antenna design, Matching networks, Network analyzers, Medical

• Nuclear power plant control system (2016)
  Analysis of how to prolong the lifetime of the control system in nuclear reactor and implementation of prototypes for further system tests.
  Responsibilities:  Evaluation of existing control system, making proposal how to modernizing it and give design input for prototypes.
  Technologies: Nuclear control process, Nuclear safety, Requirement- reliability- and cost analysis. Long system lifetime, Advanced test systems. Documentation.

 

• Industrial sensor system (2015 )
  Design of an elongation measurement system for industrial applications
  Responsibilities: System and HW design, Power management, integration with mechanics, CAD, test and verification,
  Technologies: Miniaturization, Bluetooth Smart, VCSEL laser, transimpedance amplifiers, Antenna design

 

• E-Bike HMI (2014-2015)
  Design of user interface display for E-Bikes.
  Responsibilities: HW design, Antenna design, test and verification, integration with mechanics
  Technologies: Miniaturization, Hall sensors, Microcontrollers, EMC, CAN-bus, NFC, RTC

 

• Wide band splitter (2014)
  Development of a micro strip wide band splitter for industrial Wlan installations
  Responsibilities: Calculations, layout, production, test and verification
  Technologies: Qucs, Sonnet, Altium Designer, Micro strip design, 2.4GHz-5.8GHz design, Geomagic design, Network analyzer

 

• Fetus CTG monitor (2013 – 2014)
  Development of next generation wireless fetus CTG monitor
  Responsibilities: HW design, Wireless interfaces, Battery management, Miniaturization, Schematic, CAD, test and verification
  Technologies: Bluetooth, Battery management, ECG, ultrasound, Altium Designer, EMC, NFC, USB
  
  
• Active industrial power filters (2013)
  Design of computational module for active industrial power filters
  Responsibilities: HW Design and review
  Technologies: LTSpice, FPGA, DDR3, Power management

 

• Diplexer and splitter (2013)
  Development of a micro strip diplexter and splitter for industrial Wlan installations
  Responsibilities: Calculations, layout, production, test and verification
  Technologies: Qucs, Sonnet, Altium Designer, Micro strip design, 2.4GHz-5.8GHz design, Geomagic design, Network analyzer

 

• Hardware Team Lead (stand in), FlatFrog (2012)
  Planning and develop next generation touch screens
  Responsibilities: Managing international relations, project management, system design
  Technologies: Altium Designer, Flexfilm, Miniaturization, ASIC design

 

• High voltage power supply (2012)
  5kV and 800W regulated power supply for ozone generator.
  Responsibilities: Design of logic power supplies, PCB CAD
  Technologies: Flyback converters, Buck regulators, Altium Designer

 

• E-Bike display system (2012)
  Design of user interface display for E-Bikes.
  Responsibilities: HW design, test and verification, integration with mechanics
  Technologies: LCD displays, Microcontrollers, EMC-test and debug, MODBUS

 

• Keyless entry system (2011)
  Design of remote keyless entry system for vehicles. The system also contains a wireless access point for remote monitoring of the vehicle.
  Responsibilities: HW design, PCB CAD, test and verification, industrialization support
  Technologies: Design for automotive, WLAN access point, ISM band radio, Antenna design, CAN-bus, Microcontrollers, Altium Designer, EMC-test and debug, LTspice

 

• Abdominal height measuring system (2011)
  Research project about obesity among teenagers. The abdominal height and cross section is measured with a laser and vision system.
  Responsibilities: Image analysis and signal processing
  Technologies: Matlab, C

 

• Mobile phone accessory (2011)
  A smart USB charging desk stand for mobile phones.
  Responsibilities: HW design
  Technologies: USB hubs, USB ACA, EMC-test and debug, Altium Designer

 

• Hardware system architect
  Design system interface architecture at Sony Ericsson.
  Responsibilities: Design, specification writing, Verification, Implementation support.
  Technologies: Media hardware, Antennas, Audio system, USB specifications, System interfaces, Analogue and Digital Hardware design, Mobile hardware platforms

 

• System engineer
  Investigation of cutting edge technologies as input to technology road maps at Sony Ericsson's accessory department. Support to product projects that implementing new technologies.
  Technologies: Hardware design, USB specifications, System interfaces, Micro controllers, Mobile hardware platforms, Sensors, Audio systems, Acoustics, Media hardware, Antennas, Matlab, C, Signal processing, DSP, Multimedia codecs,

 

• Project management
  PM for a system architect team of seven architects/designers investigating the use of USB interface within portable devices.
  Technologies: Planning, Budget

 

• Project management
  PM for a system architect team of four architects, Software, Hardware and Mechanics, supervising implementation work within Sony Ericsson's organization.
  Technologies: Gant charts, Network diagrams, Planning, Budget

 

• Software designer and developer
  Integration and customization project of the Teleca software sweet, Obigo. The main responsibility areas are implementation of change requests, defect correction and customer support.
  Technologies: C, Windows mobile, ClearCase, ClearQuest, Mercury Quality Center,

Courses

Course
Introduction to Mobile Telephony
IMS Overview
Applied Project Management
EMC measurement

Course Institute
Tech Support AB
ip-solutions
Wenell
swerea | IVF

Year
2006
2008
2008
2018

Other

• 16+ patents
• Great knowledge within agriculture, forestry and animal care.
• Operating a real estate company 2014-08 to 2020-11
  
• Swedish driving license class A and B