| 摘要 |
PROBLEM TO BE SOLVED: To improve CMRR at a time of AC coupling in an actual operating state.SOLUTION: The differential amplifier circuit includes: a differential amplifier that is AC coupled; a high pass filter connected to an input terminal of the differential amplifier; a variable resistive element for connecting between a positive input terminal and a negative input terminal of the differential amplifier; and an adjustment circuit for changing a resistance value of the variable resistive element.SELECTED DRAWING: Figure 1 |
