Patent ID: 9225229
Filing Date: 2015-12-29
Classification: H02M,H03K

Abstract:
1. A semiconductor switch circuit, comprising: a signal transmission switch between an input signal node and an output signal node and configured to connect the input and output signal nodes to each other according to a first control signal; a level shifter configured to output the first control signal at a boosted voltage level that is greater than a first power supply voltage level when a second control signal of a first level and not a second level is supplied to the level shifter; a booster circuit configured to receive a power supply voltage at the first power supply voltage level and output a boosted voltage at the boosted voltage level to the level shifter; a control circuit configured to supply the second control signal to the level shifter; and a capacitance switching circuit configured to change a capacitance level of a connection between an output node of the booster circuit and a ground node according to a level of the boosted voltage.