Patent ID: 8410782

Claim:
A switch testing circuit configured for testing a switch, comprising: a switch element comprising a first terminal, a second terminal, and a control terminal for controlling the connection between the first terminal and the second terminal; wherein the second terminal of the switch element is connected to ground via the switch; a first light emitting diode comprising a cathode coupled to the first terminal of the switch element and an anode coupled to a power source, the first light emitting diode configured for indicating the connection condition between the switch and the switch testing circuit; and a control chip comprising a signal terminal coupled to the control terminal of the switch element and a detecting terminal coupled to one of the first terminal and the second terminal of the switch element; wherein when the switch testing circuit tests the switch, the control chip acquires a voltage of the first terminal of the switch element, compares the acquired voltage with a comparison voltage and determines whether the switch is qualified or disqualified according to the comparison.