| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a settling speed. <P>SOLUTION: An operational amplification circuit comprises: a differential pair (M1, M2, M19) for amplifying a differential input signal; a pair of two cascode amplifiers (M9, M10) connected to one output end and the other of the differential pair, respectively; and a first, source-grounded MOS transistor pair (M11a, M12a) having respective gates connected to one output end and the other of the cascode amplifier pair and respective drains connected to the one output end and the other of the differential pair, and further comprises a second, source-grounded MOS transistor pair (M3a, M4a) of the same conductivity type as that of the first MOS transistor pair having respective gates connected to the one output end and the other of the cascode amplifier pair and respective drains connected to the other output end and the one of the differential pair. <P>COPYRIGHT: (C)2012,JPO&INPIT |
