Abstract: An over-voltage protection circuit includes an over-voltage detection circuit, a voltage generator and a switch for providing over-voltage protection between two pins of a USB Type-C port. The over-voltage detection circuit provides an over-voltage signal according to the level of the second pin. The switch includes a first end coupled to the first pin, a second end coupled to the second pin and a control end coupled to a control signal. When the over-voltage signal does not indicate an over-voltage occurrence at the second pin, the voltage generator provides the control signal having a first level for operating the switch in a first region. When the over-voltage signal indicates an over-voltage occurrence at the second pin, the voltage generator adjusts the control signal to a second level for cutting off the switch. The switch operates in a second region after the over-voltage occurrence and before the switch is cut off.

Abstract: An over-voltage protection circuit includes an over-voltage detection circuit, a voltage generator and a switch for providing over-voltage protection between two pins of a USB Type-C port. The over-voltage detection circuit provides an over-voltage signal according to the level of the second pin. The switch includes a first end coupled to the first pin, a second end coupled to the second pin and a control end coupled to a control signal. When the over-voltage signal does not indicate an over-voltage occurrence at the second pin, the voltage generator provides the control signal having a first level for operating the switch in a first region. When the over-voltage signal indicates an over-voltage occurrence at the second pin, the voltage generator adjusts the control signal to a second level for cutting off the switch. The switch operates in a second region after the over-voltage occurrence and before the switch is cut off.

Abstract: A signal relay system includes an input terminal, an output terminal, a signal detector, a signal repeater, an input terminal circuit, an output terminal circuit, a switch and a switch controller. The signal detector is for detecting a wakeup signal from the input terminal. The signal repeater is for receiving a transmission signal and to amplify and forward the transmission signal. The input terminal circuit is for reducing impedance between the input terminal and the signal repeater. The output terminal circuit is for reducing impedance between the output terminal and the signal repeater. The switch is for coupling the output terminal to the signal repeater or the input terminal. The switch controller is for operating the switch according to a detection result of the signal detector.

Abstract: A signal relay system includes an input terminal, an output terminal, a signal detector, a signal repeater, an input terminal circuit, an output terminal circuit, a switch and a switch controller. The signal detector is for detecting a wakeup signal from the input terminal. The signal repeater is for receiving a transmission signal and to amplify and forward the transmission signal. The input terminal circuit is for reducing impedance between the input terminal and the signal repeater. The output terminal circuit is for reducing impedance between the output terminal and the signal repeater. The switch is for coupling the output terminal to the signal repeater or the input terminal. The switch controller is for operating the switch according to a detection result of the signal detector.

Abstract: A gate driving circuit for providing a high driving voltage includes a first N-type high-voltage transistor and a second N-type high-voltage transistor connected in series between a driving voltage output node and a system low-voltage source. A voltage difference between a system high-voltage source and the system low-voltage source is greater than a withstand voltage of the first or second N-type high-voltage transistor. When the driving voltage output node is to output a system high voltage, the first N-type high-voltage transistor and the second N-type high-voltage transistor are turned off. Deep N-type well regions of the first N-type high-voltage transistor and the second N-type high-voltage transistor are applied with a first bias voltage. A voltage difference between the first bias voltage and the system low-voltage source is smaller than an interface breakdown voltage between the deep N-type well region and a P-type well region of the second N-type high-voltage transistor.

Abstract: A detection circuit of Universal Serial Bus (USB) is provided. A port of the USB has a first configuration channel pin and a second configuration channel pin, and the first and second configuration channel pins are disposed on opposite sides. The detection circuit includes a switch unit and a detection unit. The switch unit is coupled to the first and second configuration channel pins to sequentially provide a first voltage level of the first configuration channel pin and a second voltage level of the second configuration channel pin. The detection unit is coupled to the switch unit and correspondingly provides a state reference signal according to the first and second voltage levels.

Abstract: A detection circuit of Universal Serial Bus (USB) is provided. A port of the USB has a first configuration channel pin and a second configuration channel pin, and the first and second configuration channel pins are disposed on opposite sides. The detection circuit includes a switch unit and a detection unit. The switch unit is coupled to the first and second configuration channel pins to sequentially provide a first voltage level of the first configuration channel pin and a second voltage level of the second configuration channel pin. The detection unit is coupled to the switch unit and correspondingly provides a state reference signal according to the first and second voltage levels.