Patent attributes
Apparatus and methods for controlling radio frequency (RF) switches are disclosed. Provided herein are apparatus and methods for controlling RF switches. In certain configurations, an RF system includes a charge pump for generating a charge pump voltage, an RF switch, a level shifter for turning on or off the RF switch, and a level shifter control circuit for controlling the level shifter. The charge pump receives a mode signal used to enable or disable the charge pump. Additionally, the level shifter receives power in part from the charge pump voltage, and controls the RF switch based on a switch enable signal. The level shifter control circuit receives the mode signal and biases the level shifter with a bias voltage that changes based on a state of the mode signal.
