| 摘要 |
PROBLEM TO BE SOLVED: To provide a double balanced mixer that is provided with a novel output stage consisting of components completely mountable on an integrated circuit. SOLUTION: The output stage 50 of the double balanced mixer 70 with a 1st intermediate port 26 and a 2nd intermediate port 28 is provided with an operational amplifier 60, an impedance 58, and 1st and 2nd current source devices 52, 54. The operational amplifier 60 has a 1st input port 62, a 2nd input port 64, and an IF output port 66 and the impedance 58 is connected between the 1st input port 62 and the 2nd input port 64. A 1st current source device 52 has a 1st terminal that is connected to both the 1st input port 62 and the 1st intermediate port 26 that are interconnected with each other. A 2nd current source device 54 has a 2nd terminal that is connected to both the 2nd input port 64 and the 2nd intermediate port 28 that are connected each other.
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