| 摘要 |
PROBLEM TO BE SOLVED: To provide a new operational amplifier circuit that stably operates in a wide band by being connected with a phase compensation circuit.SOLUTION: The operational amplifier circuit is configured by connecting Rc1 and Rc2 in series between a negative input terminal and an output terminal of an operational amplifier, connecting Cc1 between a node between the Rc1 and the Rc2 and a positive input terminal, and connecting a phase compensation capacitor Cc2 between the positive input terminal and a ground terminal. A capacitance value and a resistance value can be set within a range independent of an extreme increase in a chip area in a used process, respectively. Further, a capacitor and a resistor can be added after design and can be connected also to the outside of the chip. |
