Board design is where a silicon specification meets physics. Faststream covers schematic capture, high-speed layout, signal and power integrity analysis, EMC-aware design, prototype build, bring-up and validation — including the stack-up and return-path decisions that determine whether a design will pass certification before anyone has built one.
Return-path discontinuity. A high-speed signal crossing a plane split has no adjacent return path, so the return current takes a long detour. The result is emissions, crosstalk and an eye that closes for no reason visible in the schematic.
Decoupling by rote. Capacitors placed by convention rather than against a plane impedance target, producing a power delivery network that is fine at DC and resonant somewhere that matters.
Late EMC. Emissions problems discovered at a test house cost a re-spin. Considered at layout, they usually cost nothing.
Optimistic thermal assumptions. A part rated at 85 degrees ambient in a sealed enclosure in direct sun is not operating at 85 degrees ambient.
Function allocation, part selection against availability and lifecycle, and power architecture defined.
Capture, review and design rule checking, with an explicit review of reset, power sequencing and default bus states.
Layer stack, impedance targets and routing constraints agreed before layout starts.
Placement, high-speed routing, power distribution and manufacturability review.
Signal integrity, power integrity and thermal analysis on the critical subset.
Build, power-on, interface validation and systematic debug against a written plan.
Characterisation across the operating envelope, design revision, and release for manufacture.
Edge rate rather than clock frequency. Once signal rise times are short enough that trace length is a meaningful fraction of the wavelength, transmission-line behaviour dominates and impedance control, return paths and length matching all become design constraints rather than good practice.
At stack-up and layout. Emissions problems found at a test house cost a board re-spin and schedule; the same problems addressed during layout usually cost nothing but attention.
Faststream manages prototype build with manufacturing partners, and performs bring-up, validation and characterisation.
Tell us the specification, the constraint and the deadline. Programmes that cross silicon, radio, embedded and AI are where Faststream is strongest.