发明授权
- 专利标题： Transmitter utilizing a duty cycle envelope reduction and restoration modulator
- 专利标题（中）： 发射机利用占空比包络减少和恢复调制器
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申请号： US12508464申请日： 2009-07-23
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公开(公告)号： US08131234B2公开(公告)日： 2012-03-06
- 发明人: Paul Cheng-Po Liang , Koji Takinami , Toru Matsuura
- 申请人： Paul Cheng-Po Liang , Koji Takinami , Toru Matsuura
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 主分类号： H01Q11/12
- IPC分类号： H01Q11/12 ; H04B1/04
摘要：
A broad power band transmitter utilizing a duty cycle modulator achieves 80dB of power range for 3G signals. The present invention greatly improves the efficiency of transmitters used in mobile phones, for example, by using the duty cycle modulator during medium and low power levels of the transmitting power amplifier. The power amplifier operates in three different modes based upon the amplifier power level selected. The power amplifier operates in an EER mode during high power levels, in a DCM ERR mode during medium power levels, and in a DCM mode during low power levels.