| 摘要 |
PROBLEM TO BE SOLVED: To increase a gain of differential amplification circuit at the time of a whole loading by reducing a loading at the time of the whole loading. SOLUTION: A load circuit is connected to the differential amplification circuit, and a change-over switch is connected to this load circuit. By switching the whole of the loads to a glossy load serving as the load of the differential amplification circuit, and a part of the load serving as a partial load of the differential amplification circuit, the gain can be changed in the differential amplification circuit. In that circuit, the differential amplification circuit is structured to amplify the input and the output signals of the differential amplification circuit. COPYRIGHT: (C)2006,JPO&NCIPI
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