| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation amplifier capable of obtaining a large GB product. SOLUTION: An amplifying stage 20 comprises a first PMOS transistor M6 in which one connection point of a current mirror circuit 12 and a differential pair 11 is connected to a gate, a PMOS transistor M8 in which the other connection point of the current mirror circuit 12 and the differential pair 11 is connected to a gate, a current source 21 for driving the PMOS transistor M6, and an NMOS transistor M9 in which a connection point of the PMOS transistor M6 and the current source 21 is connected to a gate. The NMOS transistor M9 constitutes a push-pull output stage together with the PMOS transistor M8. COPYRIGHT: (C)2009,JPO&INPIT
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