Patent ID: 6140993
Filing Date: 2000-10-31
Classification: G09G

Abstract:
A video signal transfer circuit for transferring an analog video signal from a video input node to a video output node in response to receiving a select signal, the video signal having a maximum voltage level, the select signal having a first logic level and a second logic level, each of the logic levels being less than the maximum voltage level of the video signal, the circuit comprising:a first transistor having a first terminal coupled to the video input node, thereby receiving the video signal, the first transistor further having a gate terminal and a second terminal coupled to the video output node;a second transistor having a first terminal for receiving the select signal, the second transistor further having a second terminal and a gate terminal;a third transistor having a first terminal coupled to a power supply line, the power supply line having a voltage potential greater than the maximum voltage level of the video signal, the third transistor further having a second terminal in electrical communication with the gate terminal of the first transistor and a gate terminal coupled to the second terminal of the second transistor;a fourth transistor having a first terminal coupled to the power supply line, a second terminal coupled to the gate terminal of the third transistor, and a gate terminal in electrical communication with the gate terminal of the first transistor; anda fifth transistor having a first terminal coupled to ground potential, a second terminal in electrical communication with the gate terminal of the first transistor, and a gate terminal coupled to the second terminal of the second transistor.