发明名称 |
APPARATUS AND METHODS FOR ENVELOPE TRACKING SYSTEMS |
摘要 |
Apparatus and methods for envelope tracking systems are disclosed herein. In certain implementations, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a DC-to-DC converter that generates a regulated voltage from a battery voltage and controls a voltage of the regulated voltage using a low frequency feedback signal. The envelope tracking system further includes an error amplifier that generates an output current using an envelope signal and a high frequency feedback signal. The low frequency feedback signal is based on a low frequency component of the power amplifier supply voltage and the high frequency feedback signal is based on a high frequency component of the power amplifier supply voltage. The error amplifier generates the power amplifier supply voltage by adjusting the magnitude of the regulated voltage using the output current.
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申请公布号 |
US2013217345(A1) |
申请公布日期 |
2013.08.22 |
申请号 |
US201313763410 |
申请日期 |
2013.02.08 |
申请人 |
SKYWORKS SOLUTIONS, INC.;SKYWORKS SOLUTIONS, INC. |
发明人 |
BALTEANU FLORINEL G.;RIPLEY DAVID STEVEN;KHESBAK SABAH;STRAHLER JEFFREY GORDON;ARKISZEWSKI ROMAN ZBIGNIEW;TKACHENKO YEVGENIY A. |
分类号 |
H03F3/193 |
主分类号 |
H03F3/193 |
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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