Patent ID: 8963619
Filing Date: 2015-02-24
Classification: H03K,H04B

Abstract:
1. A semiconductor switch applicable to an electronic device, comprising a switching unit which comprises: a transistor having a drain, a gate and a source; a drain bias resistor coupled to the drain; a drain bias selecting circuit to couple the drain bias resistor with a node of a first drain bias voltage when the transistor is turned on, and couple the drain bias resistor with a node of a second drain bias voltage when the transistor is turned off, in which the voltage values at the nodes of the first and second drain bias voltages are independent of the coupling actions of the drain bias selecting circuit; a gate bias resistor coupled to the gate; a gate bias selecting circuit to couple the gate bias resistor with a node of a first gate bias voltage when the transistor is turned on, and couple the gate bias resistor with a node of a second gate bias voltage when the transistor is turned off, in which the voltage values at the nodes of the first and second gate bias voltages are independent of the coupling actions of the gate bias selecting circuit; a source bias resistor coupled to the source; and a source bias selecting circuit to couple the source bias resistor with a node of a first source bias voltage when the transistor is turned on, and couple the source bias resistor with a node of a second source bias voltage when the transistor is turned off, in which the voltage values at the nodes of the first and second source bias voltages are independent of the coupling actions of the source bias selecting circuit, wherein the first and second drain bias voltages are different, the first and second gate bias voltages are different, and the first and second source bias voltages are different.