System and method for a driving a radio frequency switch
First Claim
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1. A radio frequency (RF) switching circuit comprising:
- a plurality of series connected RF switch cells comprising a load path and a control node, wherein each of the plurality of series connected RF switch cells comprises a switch transistor and a gate resistor having a first end coupled to a gate of the switch transistor and a second end coupled to the control node; and
a switch driver coupled to the control node, the switch driver comprising a variable output impedance that varies with a voltage of the control node.
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Abstract
In accordance with an embodiment, a radio frequency (RF) switching circuit includes a plurality of series connected RF switch cells having a load path and a control node, and a switch driver coupled to the control node. Each of the plurality of series connected RF switch cells includes a switch transistor and a gate resistor having a first end coupled to a gate of the switch transistor and a second end coupled to the control node. The switch driver includes a variable output impedance that varies with a voltage of the control node.
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Citations
20 Claims
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1. A radio frequency (RF) switching circuit comprising:
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a plurality of series connected RF switch cells comprising a load path and a control node, wherein each of the plurality of series connected RF switch cells comprises a switch transistor and a gate resistor having a first end coupled to a gate of the switch transistor and a second end coupled to the control node; and a switch driver coupled to the control node, the switch driver comprising a variable output impedance that varies with a voltage of the control node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating a radio frequency (RF) switching circuit comprising a load path and a control node, wherein the RF switching circuit comprises a plurality of series connected RF switch cells and a switch driver coupled to the control node, each of the plurality of series connected RF switch cells comprising a switch transistor and a gate resistor having a first end coupled to a gate of the switch transistor and a second end coupled to the control node, and the switch driver comprising a variable output impedance that varies with a voltage of the control node, wherein the method comprises:
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applying a first static voltage to the control node of the RF switching circuit at a first applied impedance; changing the voltage of the control node of the RF switching circuit form the first static voltage to a second static voltage, wherein changing the voltage comprises charging the control node of the RF switching circuit at a second applied impedance; and applying the second static voltage to the control node of the RF switching circuit at a third applied impedance. - View Dependent Claims (17, 18, 19, 20)
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Specification