COMPACT SWITCH WITH ENHANCED LINEARITY PERFORMANCE

• US 20120190313A1
• Filed: 04/02/2012
• Published: 07/26/2012
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: Skyworks Solutions Incorporated
• Original Assignee: Skyworks Solutions Incorporated
• Inventors: Prikhodko, Dima, Mason, Jerod F., Matte, Steven P., Pessia, John, Chiesa, Jason, Nabokin, Sergey, Tkachenko, Gene A., Carter, Richard A., Sprinkle, Steven C., Shirokov, Mikhail
• Granted Patent: US 8,509,682 B2
• Time in Patent Office: Days
• US Class Current: 455/83
• CPC Class Codes: H01P 1/15 by semiconductor devices
• CPC Class Codes: H03K 17/6871 the output circuit comprising more than one controlled field-effect transistor
• CPC Class Codes: H03K 17/693 Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors logic circuits H03K19/00; code converters H03M5/00, H03M7/00
• CPC Class Codes: H04B 1/48 in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter H04B1/46 takes precedence

Abstract

A switch element includes a switch device having a drain, a source and a plurality of gates, and at least one additional interconnect located between the plurality of gates, the additional interconnect operative to establish a constant potential between the at least two gates.

Claims

1. A switch element comprising:

a source;

a drain;

a plurality of gates disposed between the source and the drain, the plurality of gates having a first input; and

an additional interconnect forming an additional gate structure having a second input different from the first input, the additional interconnect disposed between the source and the drain, and the additional interconnect interleaved with respect to at least two of the plurality of gates.

2. The switch element of claim 1 further including a resistance between the source and the drain, the resistance electrically connected to the additional gate structure.

3. The switch element of claim 2 wherein the switch element includes a first device having at least two gates and a second device having at least two gates, the additional interconnect disposed between the first device and the second device.

4. The switch element of claim 3 wherein the switch element has a single gate contact to the resistance.

5. The switch element of claim 2 wherein the switch element includes a first device having at least three gates and a second device having at least three gates, the additional interconnect disposed between the first device and the second device.

6. The switch element of claim 5 wherein the switch element has a single gate contact to the resistance.

7. The switch element of claim 1 wherein the additional interconnect is configured to establish a substantially constant potential between the two gates of the plurality of gates.

8. The switch element of claim 1 wherein gate connections of the plurality of gates include Schottky contacts.

9. The switch element of claim 1 further including a second additional interconnect forming a second additional gate structure, the second additional interconnect disposed between the source and the drain, and the second additional interconnect interleaved with respect to the plurality of gates.

10. The switch element of claim 1 configured for use with radio frequency signals.

11. A transceiver comprising:

an antenna;

a transmitter associated with a transmit signal, the transmitter operatively coupled to the antenna;

a receiver associated with a receive signal, the receiver operatively coupled to the antenna; and

a switch element coupled to the antenna and configured to isolate the transmit signal and the receive signal, the switch element including a source;

a drain;

a plurality of gates disposed between the source and the drain; and

an additional interconnect interleaved with the plurality of gates, the additional interconnect configured to reduce a floating node effect on the plurality of gates.

12. The transceiver of claim 11 wherein the additional interconnect is configured to substantially eliminate the floating node effect on at least two gates of the plurality of gates.

13. The transceiver of claim 11 wherein the additional interconnect forms an additional gate structure having a different input than the plurality of gates.

14. The transceiver of claim 11 further including a phase shifter, the switch element configured to electrically couple the antenna to the phase shifter.

15. The transceiver of claim 14 further including a power amplifier coupled to the phase shifter via a transmit filter.

16. The transceiver of claim 14 further including a low noise amplifier coupled to the phase shifter via a receive filter.

17. The transceiver of claim 11 further including a second switch element coupled to the antenna, the second switch element configured to operate within a different frequency band than the switch element, the second switch element including a second source;

a second drain;

a second plurality of gates disposed between the second source and the second drain;

and a second additional interconnect interleaved with the second plurality of gates, the second additional interconnect configured to reduce a floating node effect on the plurality of gates.

18. An apparatus comprising:

a source;

a drain;

a plurality of gates located between the source and the drain; and

means for establishing a substantially constant potential between the plurality of gates.

19. The switch element of claim 18 wherein the means for establishing a substantially constant potential between the plurality of gates are located between the source and the drain.

20. The switch element of claim 18 wherein the means for establishing a substantially constant potential between the plurality of gates are interleaved with the plurality of gates.

21. The switch element of claim 18 wherein the means for establishing a substantially constant potential between the plurality of gates include a connection to a resistance between the source and the drain.