专利名称：Protection circuit for power amplifier发明人：Nagata, Hideo申请号：EP04030469.3申请日：20041222公开号：EP1548931A1公开日：20050629
专利附图：
摘要：A directional coupler is provided on the output side of a power amplifier. Anincrease in reflected wave power from a load is detected through the directional couplerby an electric power detector (wave detector). Then, a detection signal of an electricpower detector is provided to a power amplifier supply voltage control circuit. As a
result, the supply voltage supplied to the power amplifier is reduced gradually. By virtueof this, the supply voltage provided to the power amplifier is gradually reduced when thepower amplifier approaches a breakdown condition. This protects the power amplifier.
申请人：MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
地址：1006, Oaza Kadoma Kadoma-shi, Osaka 571-0050 JP
国籍：JP
代理机构：Leson, Thomas Johannes Alois, Dipl.-Ing.
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