Low pass filter for a universal home network on a customer premises european installation bus
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United States of America Patent
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Sep 23, 2003
Grant Date -
N/A
app pub date -
May 18, 2000
filing date -
May 18, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A low pass filter is configured for coupling home PNA network signals to a customer premises system having a two-wire European Installation Bus. The low pass filter uses an inductor having terminal ends connected to windings and configured in a non-compensating mode for generation of sufficient inductance for low pass filtering of the home PNA network signals from high frequency components of EIB signals generated by EIB bus coupling units. Use of an inductor having terminal ends connected to windings in a non-compensating mode enables the use of a smaller inductor core, such as a common mode choke or a ferrite bead toroid, that can fit within an EIB bus connector. Hence, existing EIB bus connectors can be replaced with improved coupling units having low pass filters that enable coupling of home PNA signals to the EIB bus. In addition, use of a toroid having windings in the non-compensating mode creates a closed loop within the toroid for flux induced by the windings, minimizing electromagnetic interference. Finally, use of an improved coupling unit having a low pass filter isolates capacitive influences from EIB bus coupling units, ensuring that the home PNA signals are not distorted by the EIB bus coupling units.
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