Engineering from First Principles

Hardware design isn't just about connecting components. It's about understanding system-level interactions, power distribution, thermal management, signal integrity, and manufacturing constraints. We approach every design from first principles - starting with requirements, building block diagrams, analyzing trade-offs, and creating detailed implementations that work in the real world.

DFM

Design for Manufacturing

Every design optimized for yield, cost, and producibility from day one.

Thermal

Thermal Analysis

Power dissipation calculations, heat sink sizing, thermal modeling.

Power

Power Distribution

Sequencing, regulation, protection, and decoupling strategies.

EMI/EMC

EMI Mitigation

Design practices to meet radiated and conducted emissions requirements.

Our Design Process

Systematic approach from concept to production-ready design.

1. Requirements Capture

We start by understanding your needs:

Functional requirements (what the system must do)
Performance requirements (speed, accuracy, throughput)
Environmental requirements (temperature, humidity, shock/vibe)
Regulatory requirements (FCC, CE, UL, safety standards)
Cost targets and production volumes
Timeline and milestone constraints

Deliverable: Requirements specification document with success criteria

2. System Architecture

High-level design and component selection:

Block diagram development
Processor/controller selection (ARM, FPGA, microcontroller)
Interface definition (USB, Ethernet, SPI, I2C, etc.)
Memory architecture and sizing
Analog signal chain design
Component vendor selection and qualification

Deliverable: System block diagram, BOM estimate, risk analysis

3. Power Budget & Analysis

Critical for battery-powered and high-performance designs:

Power consumption estimation for all ICs
Battery sizing and runtime calculations
Regulator selection and efficiency analysis
Power sequencing requirements
Inrush current and brownout protection
Load switch and power gating strategies

Deliverable: Power budget spreadsheet, regulator selection

4. Thermal Management

Preventing thermal failures before they happen:

Power dissipation calculations (P = I²R, switching losses)
Junction temperature estimation (Tj = Ta + (θJA × P))
Heat sink selection and sizing
Thermal interface material (TIM) selection
Forced air vs. natural convection analysis
Component derating for reliability

Deliverable: Thermal analysis report, cooling strategy

Technical Expertise Areas

Power Distribution Network (PDN)

Clean, stable power is fundamental to reliable operation.

Linear Regulators

LDO selection: Dropout voltage, PSRR, load regulation
Thermal: Power dissipation P = (Vin - Vout) × Iload
Stability: Output capacitor ESR requirements
Use cases: Low noise analog supplies, post-regulation

Switching Regulators

Buck converters: High efficiency, step-down
Boost converters: Step-up, battery-powered
Buck-boost: Wide input range applications
Inductor selection: DCR, saturation current, ripple
Layout critical: Hot loop minimization, GND planes

Decoupling Strategy

Bulk capacitors: 10-100µF electrolytic/ceramic
High-frequency: 0.1µF ceramics at every IC
Ultra-HF: 0.01µF for GHz-range transients
Placement: Short traces, multiple vias to GND plane

Processor & Memory Systems

Selecting the right processor for your application.

Microcontroller Selection

ARM Cortex-M: M0+ (low power), M4 (DSP), M7 (performance)
Peripherals: ADC, DAC, timers, communication interfaces
Memory: Flash, RAM, EEPROM requirements
Power modes: Sleep, deep sleep, shutdown currents

Memory Architecture

SRAM: Fast, volatile, larger die size
DRAM/DDR: High density, requires refresh, complex routing
Flash: NOR (XIP), NAND (storage), eMMC
External memory: SPI, Quad-SPI, parallel interfaces

Clock Distribution

Crystal selection: Frequency accuracy, load capacitance
Oscillator stability: PPM over temperature
PLL configuration: Jitter, phase noise considerations
Clock routing: Impedance control, length matching

Analog Signal Conditioning

Precision analog design for sensors and data acquisition.

Amplifier Selection

Op-amps: GBW, slew rate, input offset, noise
Instrumentation amps: CMRR, gain accuracy
Difference amps: High-side sensing, isolated
Rail-to-rail: Single-supply applications

ADC Design

Resolution: 12-bit, 16-bit, 24-bit selection
Sample rate: Nyquist, oversampling considerations
Anti-alias filtering: Cutoff frequency, order
Reference: Voltage reference stability, tempco
SNR/ENOB: Effective number of bits in real conditions

Sensor Interfaces

Thermocouples: Cold junction compensation
RTDs: 2-wire, 3-wire, 4-wire configurations
Load cells: Wheatstone bridge, excitation
Current loops: 4-20mA industrial standards

EMI/EMC Design Practices

Meeting regulatory requirements for emissions and immunity.

Radiated Emissions

Clock management: Spread-spectrum clocking
Edge rates: Slow down unnecessarily fast signals
Cable shielding: 360° termination, pigtails
Enclosure design: Seams, gaps, apertures

Conducted Emissions

Input filtering: Common-mode, differential-mode
Ferrite beads: Impedance vs. frequency selection
Power supply design: Switching regulator layout
Ground strategy: Single-point, multi-point, hybrid

ESD Protection

TVS diodes: Clamping voltage, capacitance
Series resistance: Current limiting
ESD test levels: Contact (4kV), air (8kV), IEC 61000-4-2
PCB design: Ground pour under connectors

Design Tools & Analysis

We use industry-standard tools for simulation and analysis.

Schematic Capture

Altium Designer (primary platform)
OrCAD / Cadence (legacy support)
KiCad (open-source projects)
Hierarchical, multi-sheet designs
Design rule checking (DRC)
Bill of Materials (BOM) generation

SPICE Simulation

LTspice for power and analog circuits
AC/DC analysis, transient response
Component stress analysis
Worst-case analysis (temperature, component tolerances)
Monte Carlo analysis for yield prediction

Thermal Modeling

Analytical calculations (θJA, θJC)
Heat sink sizing and CFD when needed
Component derating curves
Reliability calculations (MTBF, FIT rates)
Thermal camera validation

Signal Integrity

Impedance calculations (microstrip, stripline)
Transmission line analysis
Reflection, crosstalk, EMI simulation
Eye diagram analysis for high-speed digital
SI/PI co-simulation

Component Selection & Sourcing

Selection Criteria

Performance: Does it meet electrical specifications?
Availability: Lead times, multiple distributors
Longevity: Product lifecycle, not going obsolete soon
Cost: Unit price at production volumes
Thermal: Operating temperature range adequate
Packaging: Hand-solderable for prototypes, production-friendly

Vendor Qualification

Authorized distributors (Digi-Key, Mouser, Arrow)
Direct from manufacturer for production
Second-source options when critical
Counterfeit risk mitigation
Lead-time management and allocation

Design for Cost

Standard component values (E12, E24 series)
Minimize unique part numbers
Volume pricing break points
Avoid exotic packages (QFN/DFN preferred over BGA when possible)
Cost vs. performance trade-off analysis

Obsolescence Management

PCN (Product Change Notification) monitoring
PDN (Product Discontinuation Notice) tracking
Alternative component identification
Last-time-buy decisions
Redesign planning for EOL components

Design Deliverables

Complete documentation package for manufacturing and support.

Requirements

Specification document, block diagram, success criteria

Analysis

Power budget, thermal analysis, BOM cost estimate

Schematics

Multi-sheet hierarchical design with DRC clean

BOM

Complete bill of materials with vendor part numbers

Documentation

Design notes, test procedures, manufacturing notes

Hardware Architecture & Design