Patent ID: 9543954
Date: 2017-01-10
CPC Classifications: H03K

Claim:
1. A driver circuit, comprising: a pull-up switch unit, having a first terminal coupled to a first voltage, and a second terminal of the pull-up switch unit being coupled to an output terminal of the driver circuit; an isolating switch, having a first terminal coupled to the second terminal of the pull-up switch unit; a pull-down switch unit, having a first terminal coupled to a second terminal of the isolating switch, and a second terminal of the pull-down switch unit being coupled to a second voltage; wherein when the driver circuit operates in an initialization mode, the isolating switch is turned off, and the pull-down switch unit samples a threshold voltage of the pull-down switch unit to obtain a pull-down threshold voltage value; and when the driver circuit operates in a normal mode, the isolating switch is turned on, and the pull-down switch unit uses the pull-down threshold voltage value to compensate an input voltage of the pull-down switch unit; and a control unit, having an input terminal coupled to an input terminal of the driver circuit, and a first output terminal and a second output terminal of the control unit being coupled to a control terminal of the pull-up switch unit and a control terminal of the pull-down switch unit respectively.