Frequency conversion circuit and mixing circuit including the same
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United States of America Patent
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Sep 5, 1995
Grant Date -
N/A
app pub date -
Feb 4, 1994
filing date -
Feb 5, 1993
priority date (Note) -
Expired
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Abstract
A frequency conversion circuit for mixing first and second frequency signals to supply an output frequency signal comprises: first and second FETs having first and second gates for receiving the first and second frequency signals respectively; and a third FET having a third gate ac-grounded, the first to third FETs being connected in series such that a current flowing through the current circuit between the source and drain is controlled by the first to third gates, the third FET being provided between the first and second FETs. The third FET may also be provided between connection an end of the series connector and the second FET in accordance with frequency differences between the first and second frequency signals and between the second frequency signal and the output frequency signal. A triple gate FET can be used in place of these three FETs connected in series. A quad gate FET can be used also. A mixing circuit including the frequency conversion circuit mentioned above is also disclosed.
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