发明名称 |
ENVELOPE TRACKING POWER SUPPLY CIRCUIT AND HIGH-FREQUENCY AMPLIFIER INCLUDING ENVELOPE TRACKING POWER SUPPLY CIRCUIT |
摘要 |
The invention aims to maintain a high efficiency even for a high-frequency signal having a wideband envelope. The envelope tracking power supply circuit 5 is a power supply circuit for generating an output voltage according to the envelope of a high frequency signal and comprises a voltage follower circuit 7 for receiving an envelope signal and outputting a voltage according to the envelope signal SE; two parallel resistors Rsense connected in parallel between the output of the voltage follower circuit 7 and an output terminal PO; hysteresis comparators 9a, 9b for detecting respective voltage drops in the parallel resistors Rsense and generating voltages according to the voltage drops; and switching converters 11a, 11b for performing switching according to the respective voltages outputted from the hysteresis comparators 9a, 9b and outputting a voltage to the output terminal PO.
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申请公布号 |
US2011031953(A1) |
申请公布日期 |
2011.02.10 |
申请号 |
US20090866676 |
申请日期 |
2009.02.03 |
申请人 |
KANBE AKIHIRO;KANETA MASATO;KOBAYASHI HARUO;HIRATA HITOSHI;SHIMURA TATSUHIRO |
发明人 |
KANBE AKIHIRO;KANETA MASATO;KOBAYASHI HARUO;HIRATA HITOSHI;SHIMURA TATSUHIRO |
分类号 |
G05F3/02 |
主分类号 |
G05F3/02 |
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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