Common mode and differential mode EMI noise separator
This technology is a specialized circuit that cleanly separates two distinct types of electrical noise — common mode and differential mode — that travel along power lines and signal cables. It works by using carefully matched pairs of coupled inductors (transformers) arranged in a symmetric layout, with extra design features that cancel out the unwanted stray electrical effects that normally degrade measurement accuracy. Think of it as a precision diagnostic splitter that tells engineers exactly which type of electromagnetic interference they are dealing with, and in what proportion. The circuit was designed to work accurately across a wide frequency range, from low to high, by addressing both the geometry of the board layout and the magnetic properties of the inductors.
What you could build
A bench-top or rack-mount EMI noise separator instrument sold to power electronics labs, EMC compliance testing facilities, and switching power supply manufacturers who need to characterize conducted emissions before regulatory certification. Defense contractors and industrial inverter makers are natural buyers.
Who in Virginia should care
Defense electronics and power electronics contractors in Northern Virginia and the Hampton Roads corridor — particularly those doing EMC qualification work for military programs — would have direct use for this.
Readiness: Lab validated
Concept — described but not yet demonstrated. Lab validated — supported by experimental results in the patent. Prototype likely — the text describes a built, working embodiment.
Readiness is inferred from the patent text, not from a lab visit.
The record
- Inventors
- Shuo Wang, Fred C. Lee
- Granted
- February 28, 2012
- Status
- Granted patent
- Patent number
- 8125291
Ready to talk?
Virginia Tech Intellectual Properties handles licensing for this technology.
Prosim summaries are generated from public patent text and are not legal advice.