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
Reading apparatus and reading method
Method and apparatus for token-based context caching
Optical recording medium, and method for producing optical recording medium
Synchronization scheduling apparatus and method in real-time multi-core system
Nucleotide sequence coding for variable regions of .beta. chains of human T lymphocyte receptors, corresponding peptide segments and the diagnostic and therapeutic uses
End to end email monitor
Vehicle window opening and closing control device
  Randomly Featured Patents
In-well aeration device
Filter units
Kiosk-installable printer with duplex path utilized to deliver printed media sheets to lower front exterior of printer
Optical system for copying
Shutter for an optical disc cartridge
Media connector that allows electrical communication to be established with a media plug
Adhesive-free lens-attached optical fibers to optical waveguide packaging system
Process for analysis of deadlocks in an operating system
Curved finishing band for garments
Exhaust gas recirculation valve powered by pressure from an oil pump that powers a hydraulically actuated fuel injector