Resources Contact Us Home
Circuit board voltage plane impedance matching

Image Number 12 for United States Patent #6150895.

A circuit board having a transition region at its perimeter. The transition region provides a deliberate increase in impedance between the voltage and ground plane from the interior side of the transition region where the board impedance is approximately that of the board impedance at an interior region of the circuit board to the edge side of the transition region where the impedance level approximates or is slightly less than that of surrounding air. In one example, the voltage plane in the transition region has a geometric configuration that provides a decrease in plane material (such as a hole, stripe, or triangle pattern) from the interior side to the edge side of the transition region. With other examples, the distance between the voltage and ground plane increases from the interior side to the edge side of the transition region.

  Recently Added Patents
Imidazole derivatives used as TAFIa inhibitors
Network based JIT on a priori knowledge of a set of disparate clients
Randomly accessible visual information recording medium and recording method, and reproducing device and reproducing method
Antenna for an automobile
Switching apparatus and controlling method thereof
Polarity switching member of dot inversion system
Real ear measurement system using thin tube
  Randomly Featured Patents
Process of manufacturing a magnetic recording medium
Transponder device for the identification of objects in front of pieces of equipment
Methods of treating tardive dyskinesia and other movement disorders using NMDA receptor antagonists
Method of auto calibrating a magnetic field sensor for drift and structure therefor
Pyridone esters as inotropic agents
System for actuating glass ribbon, cross scoring and snapping equipment
Automated lubricant dispensing system and method for a horizontal directional drilling machine
Crosslinking of unsaturated polymers by the use of hydroxylamine-esters
Non-human transgenic animals for the study of neurodegenerative syndromes