| 摘要 |
<p>Peak information about an envelope of a high frequency signal extracted from an output of a high frequency power amplifier (101) and information about a power supply voltage applied to the high frequency power amplifier (101) are detected. In order to suppress HCI degradation based on an additional value that is calculated by addition of the information, a controller (10) controls a power supply voltage regulation circuit (125) and a current regulation circuit (126), thereby automatically regulating a power supply voltage and an operating current for the high frequency power amplifier (101). Even when an output voltage exceeds the power supply voltage, a maximum value of a voltage applied to a transistor can be identified, so that HCI degradation can be suppressed.</p> |
