APPARATUS AND METHODS FOR BIASING A POWER AMPLIFIER
申请公布号:US2012178384(A1)
申请号:US201213423952
申请日期:2012.03.19
申请公布日期:2012.07.12
发明人:ANDRYS PAUL RAYMOND;RIPLEY DAVID STEVEN;SHIE TERRENCE JOHN
分类号:H04B1/38;H03G3/20
主分类号:H04B1/38
摘要:Apparatus and methods for biasing a power amplifier are provided. In one embodiment, a packaged circuit includes a power amplifier, a bond wire electrically connected between a system voltage source and a supply input of the power amplifier, a current source, a reference resistor electrically connected between the system voltage source and the current source, and a comparator. The comparator is configured to compare a sense voltage that is based on a voltage across the bond wire to a reference voltage that is based on a voltage across the reference resistor. The comparator is configured to generate a saturation control signal for clamping a bias current of the power amplifier when the sense voltage exceeds the reference voltage.
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