Biasing of radio-frequency switches
AssigneeSkyworks Solutions, Inc.
InventorGuillaume Alexandre Blin
Life of this patent
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Abstract
In some embodiments, a switching circuit can include a first node and a second node, and a plurality of transistors implemented in a stack configuration between the first node and the second node, with each transistor having a source, a drain and a gate, and the transistors being configured to be in an ON state or an OFF state to respectively allow or inhibit passage of a signal between the first and second nodes. The switching circuit can further include a bias circuit configured to bias the transistors from a bias node. The bias circuit can include a gate-gate resistor that couples each pair of neighboring transistors of the plurality of transistors, and a feed node coupled to the bias node, with the feed node being connected directly to the gate of a selected transistor of the plurality of transistors.
Claims13
A switching circuit comprising:
- a first node, a second node, and a ground node;
- a series arm including a stack of transistors implemented between the first node and the second node, each transistor having a source, a drain and a gate;
- a shunt arm including a stack of transistors implemented between the first node and the ground node, each transistor having a source, a drain and a gate;
- a series arm bias circuit including a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the series arm, and a gate-gate resistor that couples each pair of neighboring transistors of the series arm;
- and
- a shunt arm bias circuit including a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the shunt arm, and a gate-gate resistor that couples each pair of neighboring transistors of the shunt arm.
A switching module comprising:
- a packaging substrate configured to receive a plurality of components;
- and
- a switch implemented on the packaging substrate, the switch including a first node, a second node, and a ground node, the switch further including a series arm having a stack of transistors implemented between the first node and the second node, each transistor having a source, a drain and a gate, the switch further including a shunt arm having a stack of transistors implemented between the first node and the ground node, each transistor having a source, a drain and a gate, the switch further including a series arm bias circuit having a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the series arm, and a gate-gate resistor that couples each pair of neighboring transistors of the series arm, the switch further including a shunt arm bias circuit having a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the shunt arm, and a gate-gate resistor that couples each pair of neighboring transistors of the shunt arm.
A wireless device comprising:
- a switch including a first node, a second node, and a ground node, the switch further including a series arm having a stack of transistors implemented between the first node and the second node, each transistor having a source, a drain and a gate, the switch further including a shunt arm having a stack of transistors implemented between the first node and the ground node, each transistor having a source, a drain and a gate, the switch further including a series arm bias circuit having a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the series arm, and a gate-gate resistor that couples each pair of neighboring transistors of the series arm, the switch further including a shunt arm bias circuit having a bias node, a feed node coupled to the bias node and connected directly to the gate of a selected transistor of the shunt arm, and a gate-gate resistor that couples each pair of neighboring transistors of the shunt arm;
- and
- an antenna coupled to the second node and configured to support wireless operation of the wireless device.
Dependencies are inferred from the claim text.