Complex band pass filter and receiver
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United States of America Patent
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Sep 29, 2015
Grant Date -
Jul 30, 2015
app pub date -
Aug 20, 2014
filing date -
Jan 30, 2014
priority date (Note) -
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Abstract
According to one embodiment, a complex band pass filter comprises a first active filter circuit 10 to receive a first input signal on its input end and a second active filter circuit 20 to receive a second input signal on its input end, the second input signal having a 90-degree phase difference from the first input signal. A predetermined offset is imparted to the first input signal and the second input signal through the first and second signal level adjusting units (30, 40). A differential signal between the output signals of the first and second active filter circuits (10, 20) is outputted.
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