| CPC G06F 3/044 (2013.01) | 18 Claims |
|
1. A sensing circuit, comprising:
a first transistor, comprising a control terminal, a first terminal, and a second terminal;
a second transistor, coupled to the control terminal;
a third transistor, coupled to the control terminal and the second terminal;
a light sensor, coupled to the control terminal;
a capacitor, coupled to the control node;
a fourth transistor, coupled to the second terminal; and
a compensation circuit, coupled to the capacitor, wherein the compensation circuit provides the third supply voltage and the reference voltage, wherein the compensation circuit further comprises:
a fifth transistor; and
a sixth transistor, wherein a control terminal of the fifth transistor is coupled to a control terminal of the sixth transistor, and a first terminal of the fifth transistor and a second terminal of the sixth transistor are coupled to the capacitor.
|