L-C Filter with impedance transformers
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United States of America Patent
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-
Dec 7, 1982
Grant Date -
N/A
app pub date -
May 8, 1980
filing date -
May 8, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Input signals having a particular impedance in a particular frequency range are provided. A first transformer has at its input a particular impedance in the particular frequency range and provides a change at its output to a second impedance in the particular frequency range. A filter is constructed to receive the signals from the first transformer and is provided with the second impedance in the particular frequency range. When the second impedance is lower than the particular impedance, the operation of the filter at the second impedance is advantageous because the size of the inductances in the filter is significantly reduced without impairing the quality of the inductances or increasing energy losses in the inductances. A second transformer is constructed to receive the signals from the filter. The second transformer provides the second impedance at its input and provides at its output a change to the particular impedance in the particular frequency range. Means are connected to the second transformer for providing output signals having the particular impedance in the particular frequency range.
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