Electronics & PCB Design

Overview

From wearable electronics to on-board electronics of spacecrafts, Printed Circuit Boards (PCBs) are the backbone of every electronic system. To design PCBs that fulfill such diverse systems’ requirements, our designers adopt a scalable and systematic approach. At Zekeng, we design PCBs by using the latest tools and technologies to guarantee compliance with the international quality standards.

Capabilities

  • Review of ready design
  • PTH/SMT and HDI layout designs
  • 100% manual design and routing
  • Flex/rigid and non-standard geometries
  • High speed and high density digital, analog, RF, power, and mixed signal designs
  • Complex high-speed systems for low power and noise sensitive devices
  • Intrinsically safe PCB designs
  • EMI protection
  • Single ended and differential impedance control
  • Fine pitch BGA layout (0.4 mm and below)

Electronics & PCB Design Process

Step1:
Specification & Requirements

  • Analyzing marketing requirements
  • Defining product requirements
  • Defining subsystem requirements
  • Creating requirements document

Step 2:
Architecture Design

  • Selecting core components
  • Researching technologies
  • Power & signal simulations
  • Defining modules & interrelationship

Step 3:
Schematic Design

  • Connecting components and signals
  • Ensuring signal integrity
  • Schematic simulations
  • Schematic review

Step 4:
PCB Layout

  • Generating Bill of Materials (BOM)
  • Footprint library development
  • Mechanical outline & form-factor constraints
  • Masnual component placement & routing

Step 5:
PCB Manufacturing & Assembly

  • Export gerbers & production files
  • Design For Manufacturing (DFM) analysis
  • Components order
  • Organizing manufacturing & assembly

Step 6:
Project Finalization

  • Board bring-up
  • Function & automation tests
  • Documentation
  • Shipping

Fields of Competence

Power Electronics

Zekeng’s hardware engineering team architects a diverse array of power control and conversion designs to realize the optimum balance among reliability, cost, and time-to-market requirements.

Capabilities

  • Power supply and analog conversion circuit topologies
  • Energy metering and remote monitoring
  • Digital control and digital power conversion
  • Multi-chemistry battery charger and fuel gauge circuits

Featured Project: Power Quality Monitor

Design Challenges

  • Automatic range adjustment
  • High resolution and high sampling rate analog to digital conversion
  • No components that kill high frequency

Solution

  • Using high quality Programmable Gain Amplifiers
  • Using 24bit over 100 kHz, Sigma-Delta Analog to Digital Converter
  • No voltage transformers used
  • Rogowski Coil for current sensing
  • High speed Digital Galvanic Isolation

Key Accomplishments

  • Galvanic separation between mains and signal processing
  • Successful high voltage & high current design

Analog Electronics

Precision of the design can make or break analog electronics. On the other hand, analog designs are inherently complex. To balance functionality and efficiency amid this complexity is the work of an imaginative engineer. Our engineers build precise analog electronic designs that are employed in power supplies, audio signal processing systems, sensor interfaces, and data acquisition systems. We combine our design services with prototyping and simulation services to deliver a complete solution to our clients.

Capabilities

  • Low noise amplifiers design
  • Circuit modeling, simulations and analysis
  • Analog sensors with digital interfacing
  • High speed & high resolution analog conversions
  • ADC and DAC
  • Class D power amplifier circuit designs
  • Low power designs
  • Wide band designs

Featured Project: Modular Guitar Effect

Design Challenges

  • Low noise analog signal electro-mechanical switching (true bypass)
  • Low noise hot plug audio interface
  • Impedance matching
  • Reducing not desired audio feedback
  • Low noise from power supply

Solution

  • Using high quality signal relays
  • Advanced power supply filtering

Key Accomplishments

  •  All requirements fulfilled

Digital Electronics

The creation of a standard compliant product requires accuracy in each development phase and seamless integration from one phase to another. Starting from product and subsystem requirements, our hardware engineering team adds value to each subsequent phase until a successful production transition. Some of the major industries that use our designed equipment are: tracking devices, healthcare and instrumentation.

Capabilities

  • ARM9, ARM Cortex
  • SDRAM, DDR, DDR2 and DDR3
  • NOR flash and NAND flash interfaces
  • Gigabit Ethernet interfaces
  • High speed interfaces (1+ GHz)
  • High Density Interconnect Design
  • PCI, PCle, and PCl-x interfaces
  • HDMI and LVDS
  • Low power designs

Featured Project: BeagleBone Black Copy

Design Challenges

  • A Copy of BeagleBone Black with few modifications
  • Should not crash!

Solution

  • Better routing of high speed signals to DDR3
  • High speed design simulations

Key Accomplishments

  • Successfully manufactured board
  • Additional features integrated
  • Speed and stability improved (compared to BBB)