A transistor switch that provides isolation is described. The transistor switch is adapted to receive an input signal at an input terminal and either transmit the input signal to an output terminal when the transistor switch is in a first state or ground the input signal when the transistor switch is in a second state. The transistor switch comprises series switches, which couple the input terminal to the output terminal when the transistor switch is in the first state; shunt switches, which couple the input terminal to ground when the transistor switch is in the second state; and filters to provide isolation between the input terminal and the output terminal.