| 摘要 |
Semiconductor circuitry comprises a transistor pair (11, 12) consists of a transistor having a base electrode to which a first signal is applied, and another transistor having a base electrode to which a signal having a phase opposite to that of the first signal is applied, the collector electrodes of those transistors being connected to each other and the emitter electrodes of the transistors being connected to each other, a third transistor (13) connected between a common emitter of the transistor pair and a ground potential and having a base electrode to which a second signal is applied, an output load (51) connected between a common collector of the transistor pair and a power supply (Vcc), and an output circuit for furnishing a third signal from the common collector of the transistor pair, thereby suppressing generation of any even-order higher harmonic of a local oscillation signal when the semiconductor circuitry operates from a low voltage.
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