发明名称 |
METHOD AND APPARATUS FOR REDUCING INTERMODULATION DISTORTION IN AN ELECTRONIC DEVICE HAVING AN AMPLIFIER CIRCUIT |
摘要 |
<p>An electronic device includes an amplifier circuit coupled to a linearizer. The amplifier circuit may receive a first input signal including first and second frequencies and generate a first output signal including a delta frequency signal at a delta frequency, which is the difference between the first frequency and the second frequency. The linearizer includes a signal detector circuit, a current-mirror circuit, a low pass filter, a phase shifter, and a bias circuit. The signal detector circuit may generate a second output signal. The current-mirror circuit may adjust an amplitude of a signal. The low pass filter may eliminate a portion of the second output signal having frequencies greater than the delta frequency. The phase shifter may generate a feedback signal corresponding to the delta frequency signal. An amplitude and/or a phase of the feedback signal is different from an amplitude and/or a phase of the delta frequency signal.</p> |
申请公布号 |
WO2009097353(A1) |
申请公布日期 |
2009.08.06 |
申请号 |
WO2009US32272 |
申请日期 |
2009.01.28 |
申请人 |
QUALCOMM INCORPORATED;DENG, JUNXIONG;LIU, LI;GUDEM, PRASAD, S. |
发明人 |
DENG, JUNXIONG;LIU, LI;GUDEM, PRASAD, S. |
分类号 |
H03F3/193;H03F1/32;H03F1/34 |
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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