| 摘要 |
PCT No. PCT/JP90/01302 Sec. 371 Date Jul. 29, 1991 Sec. 102(e) Date Jul. 29, 1991 PCT Filed Oct. 8, 1990.According to this invention, a frequency converter comprises a frequency mixer (11) formed in a semiconductor integrated circuit (10), an impedance conversion/signal amplitude limit differential amplifier (12) formed in the semiconductor integrated circuit and connected to the output of the frequency mixer, a first frequency mixing output terminal (14) connected to an output terminal of the frequency mixer and serving as an external terminal of the semiconductor integrated circuit, and a second frequency mixing output terminal (15) connected to an output terminal of the differential amplifier and serving as an external terminal of the semiconductor integrated circuit.
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