Radio frequency switch
First Claim
1. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that are coupled in series between the first node and the second node wherein each of the plurality of switch cells comprises:
- a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and
an off-state linearization network comprising;
a first inversion-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the body terminal;
a second inversion-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the body terminal; and
a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal.
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Accused Products
Abstract
A radio frequency switch having a first node, a second node, and a plurality of switch cells that are coupled in series between the first node and the second node is disclosed. Each of the plurality of switch cells includes a field-effect transistor having a drain terminal, a source terminal, a FET gate terminal, and a body terminal and an off-state linearization network. The off-state linearization network includes varactors coupled to the drain terminal and the source terminal of the field-effect transistor.
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Citations
17 Claims
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1. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that are coupled in series between the first node and the second node wherein each of the plurality of switch cells comprises:
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a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and an off-state linearization network comprising; a first inversion-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the body terminal; a second inversion-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the body terminal; and a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that are coupled in series between the first node and the second node wherein each of the plurality of switch cells comprises:
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a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and an off-state linearization network comprising; a first accumulation-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the source terminal; a second accumulation-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the drain terminal; and a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal.
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8. A radio frequency switch cell comprising:
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a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and an off-state linearization network comprising; a first inversion-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the body terminal; a second inversion-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the body terminal; and a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A radio frequency switch cell comprising:
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a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and an off-state linearization network comprising; a first accumulation-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the source terminal; a second accumulation-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the drain terminal; and a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal.
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15. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that are coupled in series between the first node and the second node wherein each of the plurality of switch cells comprises:
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a field-effect transistor (FET) comprising a drain terminal, a source terminal, a FET gate terminal, and a body terminal; and an off-state linearization network comprising; a first inversion-mode varactor having a first varactor gate terminal coupled to the drain terminal and a first tuning terminal coupled to the body terminal; a second inversion-mode varactor having a second varactor gate terminal coupled to the source terminal and a second tuning terminal coupled to the body terminal; a first accumulation-mode varactor having a third varactor gate terminal coupled to the drain terminal and a third tuning terminal coupled to the source terminal; a second accumulation-mode varactor having a fourth varactor gate terminal coupled to the source terminal and a fourth tuning terminal coupled to the drain terminal; a gate-body switch coupled between the FET gate terminal and the body terminal, wherein the gate-body switch is configured to automatically open when the FET transitions to an on-state that passes a radio frequency signal between the drain terminal and the source terminal and is further configured to automatically close when the FET transitions to an off-state that blocks passage of the radio frequency signal between the drain terminal and the source terminal. - View Dependent Claims (16, 17)
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Specification