Patent ID: 8208882

Claim:
An antenna sense circuit, comprising: a detector, comprising: a voltage drop component, having a first terminal and a second terminal, the first terminal being directly coupled to a first power supply; a first resistor component, having a first terminal and a second terminal, the first terminal of the first resistor component being coupled to the second terminal of the voltage drop component; a second resistor component, having a first terminal and a second terminal, the first terminal of the second resistor component being coupled to the second terminal of the first resistor component, and the second terminal of the second resistor component being coupled to a second power supply; and a transistor component, having a control terminal, a first connection terminal, and a second connection terminal, the control terminal being coupled to the second terminal of the first resistor component and the first terminal of the second resistor component, the second connection terminal being directly coupled to the first power supply, and the first connection terminal used for outputting a first detecting signal; and a level shifter, coupled to the first connection terminal of the transistor component, for receiving the first detecting signal and for adjusting a voltage level of the first detecting signal to generate a second detecting signal.