Filter contact
US4954794A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Apr 10, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R13/719
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A contact assembly for installation in an electrical connector, provides effective electromagnetic filtering in a simple, compact, and rugged construction that facilitates in-field replacement of a damaged contact assembly. The contact assembly includes a signal conductor, a diode for diverting high voltages on the signal conductor to ground, and a "pi" filter for filtering out unwanted frequencies. The "pi" filter includes a ferrite bead inductor coupled to the signal conductor and a first capacitor coupling a location of the signal conductor on a first side of the inductor to ground. The other capacitor of the "pi" filter is formed by the capacitance of the diode, with the diode connected to a signal conductor location on a second side of the inductor, and with the capacitance of the diode similar or equal to that of the first capacitor. The diode is mounted in a notch of the signal conductor, the ferrite bead inductor lies immediately forward of the notch, and the first capacitor lies immediately forward of the ferrite bead. A ground conductor has a sleeve portion that immediately surrounds both the first capacitor and the ferrite bead, and has a finger contacting the diode. Sol…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.