Radio frequency switch
First Claim
1. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that is coupled in series between the first node and the second node, wherein each of the plurality of switch cells comprises:
- a switch field-effect transistor (FET) comprising a switch drain terminal, a switch source terminal, a switch gate terminal, and a switch body terminal; and
a body bias network comprising;
a first body bias FET having a first drain terminal coupled to the switch body terminal, a first gate terminal, and a first source terminal;
a first cross-FET having a second drain terminal coupled to the first source terminal, a second source terminal coupled to the switch gate terminal, and a second gate terminal;
a second body bias FET having a third drain terminal coupled to the switch body terminal, a third gate terminal, and a third source terminal; and
a second cross-FET having a fourth drain terminal coupled to the third source terminal, a fourth source terminal coupled to the switch gate terminal, and a fourth gate terminal, wherein the first gate terminal of the first body bias FET is coupled to the fourth gate terminal of the second cross-FET, and the third gate terminal of the second body bias FET is coupled to the second gate terminal of the first cross-FET.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio frequency switch made up of a plurality of switch cells coupled in series between a first node and a second node is disclosed. Each of the plurality of switch cells has a switch field-effect transistor (FET) having a switch drain terminal, a switch source terminal, a switch gate terminal, and a switch body terminal. A body bias network having a first body bias FET with a first drain terminal coupled to the switch body terminal includes a first cross-FET with a second drain terminal coupled to a first source terminal of the first bias body FET and a second source terminal coupled to the switch gate terminal. A second body bias FET has a third drain terminal coupled to the switch body terminal, and a second cross-FET has a fourth drain terminal coupled to a third source terminal of the second body bias FET.
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Citations
21 Claims
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1. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that is 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 switch field-effect transistor (FET) comprising a switch drain terminal, a switch source terminal, a switch gate terminal, and a switch body terminal; and a body bias network comprising; a first body bias FET having a first drain terminal coupled to the switch body terminal, a first gate terminal, and a first source terminal; a first cross-FET having a second drain terminal coupled to the first source terminal, a second source terminal coupled to the switch gate terminal, and a second gate terminal; a second body bias FET having a third drain terminal coupled to the switch body terminal, a third gate terminal, and a third source terminal; and a second cross-FET having a fourth drain terminal coupled to the third source terminal, a fourth source terminal coupled to the switch gate terminal, and a fourth gate terminal, wherein the first gate terminal of the first body bias FET is coupled to the fourth gate terminal of the second cross-FET, and the third gate terminal of the second body bias FET is coupled to the second gate terminal of the first cross-FET. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A radio frequency switch comprising a first node, a second node, and a plurality of switch cells that is 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 switch field-effect transistor (FET) comprising a switch drain terminal, a switch source terminal, a switch gate terminal, and a switch body terminal; and a body bias network comprising; a first body bias FET having a first drain terminal coupled to the switch body terminal, a first gate terminal, and a first source terminal; a first cross-FET having a second drain terminal coupled to the first source terminal, a second source terminal coupled to the switch gate terminal, and a second gate terminal; a second body bias FET having a third drain terminal coupled to the switch body terminal, a third gate terminal, and a third source terminal; a second cross-FET having a fourth drain terminal coupled to the third source terminal, a fourth source terminal coupled to the switch gate terminal, and a fourth gate terminal, wherein the first gate terminal of the first body bias FET is coupled to the fourth gate terminal of the second cross-FET, and the third gate terminal of the second body bias FET is coupled to the second gate terminal of the first cross-FET; and a first adjacent switch FET through which the second gate terminal of the first cross-FET is coupled to the switch drain terminal of the switch FET; and a second adjacent switch FET through which the fourth gate terminal of the second cross-FET is coupled to the switch source terminal of the switch FET. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification