Qorvo Us, Inc.

Rf Micro Devices, Inc.

Robert Andrew Phelps

Daniel Charles Kerr

Eric K Bolton

Christian Rye Iversen

An overvoltage detector for an RF switch is disclosed. The overvoltage detector is made up of circuitry having a detector output that couples to a controller, a body voltage input that couples to a charge pump, and a body voltage output that couples to a body terminal of the RF switch. The overvoltage detector is configured to detect an overvoltage across the RF switch by monitoring body leakage current flowing between the body voltage input and the body voltage output. Upon detecting body leakage current over a predetermined level, the overvoltage detector generates an overvoltage signal at the detector output to indicate an overvoltage across the RF switch.

Overvoltage detector for an RF switch

Disclosed is a harmonic cancellation circuit for an RF switch branch having a first transistor with a first gate terminal and a first body terminal, a second transistor having a second gate terminal coupled to the first body terminal, and having a second body terminal coupled to the first gate terminal. Also included is a first resistor coupled between a first coupling node and the second body terminal, and a second resistor coupled between a second coupling node and the first body terminal, wherein the first transistor and second transistor are adapted to generate an inverse phase third harmonic signal relative to a third harmonic signal generated by the RF switch branch, such that the inverse phase third harmonic signal is output through the first resistor and the second resistor to the RF switch branch to reduce the third harmonic signal.

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Greensboro, NC, United States of America

Robert Andrew Phelps