Patent ID: 8476959

Claim:
A radio frequency (RF) switch circuit, comprising: an RF switch including at least one first N type metal oxide semiconductor (NMOS) switch formed on a single chip substrate, the RF switch configured to change a transmission path of an RF signal; a switch controller including at least one second NMOS switch and at least one P type metal oxide semiconductor (PMOS) switch formed on the chip substrate, the switch controller configured to control the RF switch; and a limiter including a deep N type well diode formed on the chip substrate, the limiter configured to limit a level of the RF signal transferred from the RF switch to the switch controller through the chip substrate, wherein the at least one first NMOS switch, the at least one second NMOS switch, and the at least one PMOS switch are configured to receive respective driving powers through floating resistors, respectively, the at least one first NMOS switch comprises a first N type terminal formed on a first deep N type well substrate formed on the chip substrate, the first N type terminal configured to receive the driving power through a first floating resistor, a first P type terminal configured to receive a body power through a second floating resistor, and two second N type terminals configured to receive a gate power through a third floating resistor, and the first P type terminal and the two second N type terminals are formed on a first P type substrate formed on the first deep N type well substrate.