Low pass filters for high dynamic range wideband direct conversion receiver
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United States of America Patent
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Mar 1, 2005
Grant Date -
N/A
app pub date -
Aug 8, 2001
filing date -
Aug 8, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed are a low pass filter, and a direct conversion receiver (DCR) implementing the same, which filter and second signal channels with improved phase and gain match, allowing use of the filter and DCR in wideband environments. A first M-pole filter channel, comprised of a first plurality of 2-pole active filter stages, filters the first signal channel. A second M-pole filter channel, comprised of a second plurality of 2-pole active filter stages, filters the second signal channel. One of the second plurality of 2-pole filter stages includes two variable components. The values of the variable components of the second M-pole filter channel are adjusted to match the gain and phase of the first and second filter channels.
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