Double balanced FET mixer with high IP3 and IF response down to DC levels
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United States of America Patent
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Oct 18, 2005
Grant Date -
Aug 21, 2003
app pub date -
Feb 20, 2002
filing date -
Feb 20, 2002
priority date (Note) -
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Abstract
A double balanced FET mixer that has a high third order intercept point and an intermediate frequency response that goes to direct current levels. The mixer includes a local oscillator terminal, a RF terminal and an intermediate frequency terminal. The mixer has a pair of field effect transistors. Each field effect transistor has a gate, a drain and a source electrode. The source electrodes of the first and second transistors are connected together. A first balun transformer is connected between the local oscillator terminal and the gates. A second balun transformer is connected between the drains and the RF terminal and the intermediate frequency terminal.
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