Patent ID: 8461919

Claim:
A radio frequency (RF), switch circuit comprising: an RF switch including at least one first N-type metal oxide semiconductor (NMOS) switch configured to change a transmission path of an RF signal; and a switch controller including at least one second NMOS switch and at least one P-type metal oxide semiconductor (PMOS) switch configured to control the RF switch, wherein the at least one first NMOS switch includes a first N-type terminal formed on a first deep N-type well substrate formed on a chip substrate, and a first P-type terminal and two second N-type terminals formed on a first P-type substrate formed on the first deep N-type well substrate, wherein the first N-type terminal is configured to receive a driving power through a first floating resistor, the first P-type terminal is configured to receive a body power through a second floating resistor, and the two second N-type terminals are configured to receive a gate power through a third floating resistor, the at least one second NMOS switch includes a third N-type terminal formed on a second deep N-type well substrate formed on the chip substrate, and a second P-type terminal and two fourth N-type terminals formed on a second P-type substrate formed on the second deep N-type well substrate, the at least one PMOS switch includes a fifth N-type terminal and two third P-type terminals formed on a first N-type substrate formed on the chip substrate, the third N-type terminal and the fifth N-type terminal are configured to receive driving powers through a fourth floating resistor and a fifth floating resistor, respectively, the switch controller comprises: an oscillator configured to provide a reference signal; a charge pump configured to convert a voltage level of the reference signal from the oscillator; a decoder configured to decode a control bit from an external source; and a level shifter configured to shift the voltage level converted by the charge pump according to the decoded control bit from the decoder and to provide level-shifted voltage to the RF switch, and each of the oscillator, the charge pump, the decoder, and the level shifter includes the at least one second NMOS switch and the at least one PMOS switch.