Multi-function passive frequency mixer
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United States of America Patent
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Dec 8, 2009
Grant Date -
Jan 3, 2008
app pub date -
Jul 27, 2006
filing date -
Jun 30, 2006
priority date (Note) -
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Abstract
A frequency-mixing device performing voltage multiplying and low-pass filtering operations in addition to frequency mixing is provided. The three operations may be carried out with the same components by designing the frequency mixer appropriately. The frequency mixer comprises a first capacitance connected in series to the input of the frequency-mixing device, a first switch connected in parallel to the first capacitance, a second switch connected in series to the first capacitance, and a second capacitance connected in parallel to the second switching means. The switches are controlled by a local oscillator signal to close and open alternately according to a change in the voltage level of the first oscillator signal.
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