发明名称 |
Controllable supply voltage circuit for power amplifier |
摘要 |
<p>A power amplifying apparatus includes a high-speed low pass filter (10) which inputs an envelope signal included in a transmission signal therein, a low-speed low pass filter (11) which inputs the envelope signal therein, a determination unit (12) which inputs the envelope signal therein and determines rising or falling of the envelope signal, a selecting unit (13) which selects one of the high-speed low pass filter (10) and the low-speed low pass filter (11) according to a determined result of the determination unit (12), and a voltage supply unit (4) which generates a voltage based on a signal input according to a selection by the selecting unit (13) and supplies the voltage to a power amplifier (5) which inputs the transmission signal therein so as to amplify a power of the transmission signal.</p> |
申请公布号 |
EP2073380(A2) |
申请公布日期 |
2009.06.24 |
申请号 |
EP20080171784 |
申请日期 |
2008.12.16 |
申请人 |
FUJITSU LTD. |
发明人 |
ISHIKAWA, HIROYOSHI;FUDABA, NOBUKAZU;HAMADA, HAJIME;UTSUNOMIYA, YUICHI;NAGATANI, KAZUO;MANIWA, TORU |
分类号 |
H03F1/02 |
主分类号 |
H03F1/02 |
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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