| 摘要 |
Disclosed herewith is a circuit system for improving a slew rate while reducing the power consumption in an operational amplifier that requires a comparatively high supply voltage (e.g., 5 V or upper) operation. The operational amplifier includes level shift circuits, differential pairs whose source connected serially, current voltage conversion circuit and output stage. The level shift circuits convert a differential input signal level and output to differential pairs. Combination of level shift circuit and differential pairs realize input signal difference detection and driving current control in the common circuit.
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