Radio frequency switch controller

摘要

Implementations of radio frequency switch controllers within the scope of the appended claims are configured to reduce the impact of the clock signal induced spurs. In particular, implementations of switch controllers described herein include a poly-phase clocking scheme, as opposed to a single phase to clock the charge pump stages of an negative voltage generator. In some implementations poly-phase clocking schemes reduce the clock signal induced spurs and may preclude the need for additional on-chip or off-chip decoupling capacitors that add to the cost and physical size of a complete front end module solution.

主权项

1. A switch controller comprising:
a negative voltage generator including at least two sub-circuits configured to receive at least two control signals, each sub-circuit configured to receive a respective control signal of the at least two control signals and to draw from a regulated supply in response to an edge of the respective control signal, the negative voltage generator including one or more outputs configured to generate one or more negative voltages; a control signal generator configured to provide the at least two control signals to the negative voltage generator such that the at least two control signals are separated by at least one non-zero phase difference; a filter electrically connected to the one or more outputs of the negative voltage generator and configured to filter the one or more negative voltages; and a level-shifter array configured to receive the one or more negative voltages and the regulated supply.