Radio-frequency switch having dynamic body coupling

摘要

Radio-frequency (RF) switch circuits are disclosed including at least one first field-effect transistor (FET) disposed between first and second nodes, each of the at least one first FET having a respective body and gate. The RF switch circuit may include a coupling circuit that couples the respective body and gate of the at least one first FET, the coupling circuit configured to be switchable between a resistive-coupling mode and a body-floating mode, as well as an adjustable-resistance circuit connected to either or both of the respective gate and body of the at least one FET, the adjustable-resistance circuit including a resistor in parallel with a bypass switch.

主权项

1. A radio-frequency switch comprising:
a first field-effect transistor disposed between first and second nodes, the first field-effect transistor having a body and a gate; a coupling circuit that couples the body and the gate of the first field-effect transistor, the coupling circuit including a second field-effect transistor connected in series with a first resistor; and an adjustable-resistance circuit connected to the body of the first field-effect transistor, the adjustable-resistance circuit including a second resistor in series with a parallel combination of a third resistor and a bypass switch.