| 摘要 |
A common voltage source IC device includes an operational amplifier, a push-pull circuit receiving an output signal from the operational amplifier and outputting a common voltage to a common voltage terminal; an inverting resistor connected to an inverting input of the operational amplifier; a feedback resistor connected to the common voltage terminal and the inverting input; a capacitor connected to the common voltage terminal and the inverting input; a first switching resistor connected to the inverting input and a first switching transistor, the first switching transistor connected to the common voltage terminal; a driving resistor receiving a drive voltage and connected to a non-inverting input of the operational amplifier; a variable resistor connected to the non-inverting input and a ground source; and a second switching resistor connected to the non-inverting input and a second switching transistor, the second switching transistor connected to the ground source.
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