| 摘要 |
An amplifier circuit easily suppresses an intermodulation distortion signal incident to amplification. An input signal is class A amplified to be <img id="CUSTOM-CHARACTER-00001" he="3.13mm" wi="1.78mm" file="US20090096522A1-20090416-P00001.TIF" img-content="character" img-format="tif"/> times stronger on a path of a first amplifier 102, resulting in an input signal component F1 and F2 of power <img id="CUSTOM-CHARACTER-00002" he="3.13mm" wi="1.78mm" file="US20090096522A1-20090416-P00001.TIF" img-content="character" img-format="tif"/>F, and intermodulation distortion signal components (2F1-F2) and (2F2-F1) of power Fk1. The input signal is class AB amplified to be À times (<img id="CUSTOM-CHARACTER-00003" he="3.13mm" wi="1.78mm" file="US20090096522A1-20090416-P00001.TIF" img-content="character" img-format="tif"/>>À) stronger on a path of a second amplifier 103, resulting in an input signal component F1 and F2 of power ÀF, and intermodulation distortion signal components (2F1-F2) and (2F2-F1) of power Fk2. A combiner 104 combines the input signal component F1 and F2 of power <img id="CUSTOM-CHARACTER-00004" he="3.13mm" wi="1.78mm" file="US20090096522A1-20090416-P00001.TIF" img-content="character" img-format="tif"/>F and the intermodulation distortion signal components (2F1-F2) and (2F2-F1) of power Fk1 with the input signal component F1 and F2 of power ÀAF and the intermodulation distortion signal components (2F1-F2) and (2F2-F1) of power Fk2.
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