Patent ID: 9225175
Filing Date: 2015-12-29
Classification: G06F,H01L,H02J,H03K

Abstract:
1. A power voltage selection device, comprising: a first power voltage and a second power voltage; a power selection unit having a first PMOS transistor and a second PMOS transistor, wherein the first power voltage is supplied to a source of the first PMOS transistor, a gate of the first PMOS transistor receives a first enable signal, the second power voltage is supplied to a source of the second PMOS transistor, a gate of the second PMOS transistor receives a second enable signal, and a body of the first PMOS transistor is coupled to a body of the second PMOS transistor; an output unit having a common node to which a drain of the first PMOS transistor and a drain of the second PMOS transistor are commonly coupled; and a body voltage control unit configured to control to supply the first power voltage to the body of the first PMOS transistor and the body of the second PMOS transistor, when the first power voltage is higher than the second power voltage, and to supply the second power voltage to the body of the first PMOS transistor and the body of the second PMOS transistor, when the second power voltage is higher than the first power voltage.