发明名称 |
Self-boosting circuit for a power amplifier |
摘要 |
A power amplifier circuit includes an amplifying transistor and a dc bias circuit for biasing the amplifier transistor to obtain a conduction angle of at least about 180°. The dc bias circuit includes a self-bias boosting circuit for initially decreasing and then increasing the dc bias voltage provided to a control terminal of the amplifying transistor by the dc bias circuit as the input signal provided to the power amplifier increases. The self-bias boosting circuit is extremely simple and compact in design, and permits the power amplifier circuits to operate in Class B or Class AB with improved power output characteristics.
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申请公布号 |
US2002067209(A1) |
申请公布日期 |
2002.06.06 |
申请号 |
US20000730657 |
申请日期 |
2000.12.06 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION |
发明人 |
LUO SIFEN;SOWLATI TIRDAD;JOLY CHRIS;BURGER KERRY |
分类号 |
H03F3/21;H03F1/30;(IPC1-7):H03F3/04 |
主分类号 |
H03F3/21 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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