Low-pass filter usable with caller ID device
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United States of America Patent
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-
N/A
Issued Date -
Oct 3, 2002
app pub date -
Apr 3, 2001
filing date -
Apr 3, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An odd-order low-pass filter is disclosed for being interposed between a home telephone wiring network and a POTS, or voice-band, device to separate voice-band signals from higher frequency signals, such as ADSL signals and home networking signals. In one embodiment, the filter includes a pair of coupled inductors separated by a capacitor to isolate the POTS device from DSL signals. Each coupled inductor includes a pair of inductor windings wrapped about an inductor core. A resistive element positioned in parallel with each of the windings reduces interference between resonant xDSL signals and operation of an associated caller ID device.
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