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公开(公告)号:US20050122165A1
公开(公告)日:2005-06-09
申请号:US11036162
申请日:2005-01-14
申请人: Junghyun Kim , Daehee Lee , Sanghwa Jung , Youngwoo Kwon
发明人: Junghyun Kim , Daehee Lee , Sanghwa Jung , Youngwoo Kwon
CPC分类号: H03F3/72 , H03F1/0211 , H03F1/0277 , H03F1/56 , H03F2200/318 , H03F2203/7231 , H03F2203/7239
摘要: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120).