| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an LED driving circuit capable of suppressing brightness errors.SOLUTION: An LED driving circuit comprises; an output transistor having a drain, gate and source connected to an LED; a ground transistor having a node connected to the source of the output transistor, a drain connected to the node, and a source connected to the ground; an operational amplifier for receiving a driving signal and feedback signal, having an input stage with a first input terminal and a second input terminal and an output stage for providing the output signal to the gate of the output transistor; and a first switch assembly for providing the driving signal to one of the first input terminal and the second input terminal of the operational amplifier and for connecting the node to the other of the first input terminal and the second input terminal of the operational amplifier, the first switch assembly being connected to the driving signal, the feedback signal and the input stage of the operational amplifier.</p> |
