| 摘要 |
A signal generator generates a first internal signal including frequency f1, a second internal signal including frequency f2, and a third internal signal including frequency f3 twice as high as frequency f2, and selects and delivers one from among a first output signal including frequency f1, a second output signal including frequency f1+f2, and a third output signal including frequency f1+f3, using the first, second, and third internal signals.
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