| 摘要 |
<p>A variable attenuator comprises a series circuit unit having a first switch transistor and a first resistor which are connected in parallel, a first parallel circuit unit having a second switch transistor and a second resistor which are connected in series, and a second parallel circuit unit having a third switch transistor and a third resistor which are connected in series. At least one of the first parallel circuit unit and the second parallel circuit unit has a reactance element for phase correction which corrects the passing phase difference of high frequency signals transmitted from an input terminal to an output terminal.</p> |
