| 摘要 |
A frequency conversion circuit includes a plurality of mixers (1, 4, 8) cascaded, and a plurality of local oscillators (2, 6, 10) provided in correspondence with the mixers each, which supply local oscillation signals to the mixers each.. The frequency conversion circuit further includes a plurality of PLL circuits (3, 7, 11) that control local oscillation frequencies of the local oscillators each in correspondence with the local oscillators each. In conjunction with this construction, the local oscillators are made to oscillate at intervals of step frequencies set to the PLL circuits each, and an order of magnitude of the local oscillation frequencies is made coincident with an order of magnitude of the step frequencies. <IMAGE>
|
