Intel Corporation
Protection circuit for decoupling a low voltage circuitry from a high voltage circuitry

Abstract:

An apparatus is provided which comprises: a protection circuitry coupled between: a node and a first circuitry that is to selectively output a first voltage, the node coupled to a second circuitry that is to selectively output a second voltage, the protection circuitry comprising: a pair of complementary parallel transistors coupled between the node and the first circuitry, the pair comprising first and second transistors, wherein a gate of the first transistor is to receive a control signal at the first voltage, and a third transistor to selectively couple a gate of the second transistor to the node, a gate of the third transistor to receive the control signal at the first voltage.