MULTI-MODE TRANSCEIVER AND A CIRCUIT FOR OPERATING THE MULTI-MODE TRANSCEIVER

• US 20110171994A1
• Filed: 01/08/2010
• Published: 07/14/2011
• Est. Priority Date: 01/08/2010
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: MUKHERJEE, Subhashish, SIVADAS, Apu, FRECHETTE, Michel, KRISHNASWAMY, Thiagarajan, DAVIS, Timothy Don, PENNISI, Salvatore, PATEL, Bijit Thakorbhai, SAHU, Debapriya, RAJENDRAN, Gireesh, KUMAR, Rakesh
• Application Number:
  US12/684,134
• Publication Number:
  US 20110171994A1
• Time in Patent Office: Days
• US Class Current: 455/552.1
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence

Abstract

Multi-mode transceiver and a circuit for operating the multi-mode transceiver. A multi-mode transceiver includes a first circuit that is configurable to operate as one of a transmitter and a receiver in a first mode, and a second circuit that is configurable to operate as one of the transmitter and the receiver in a second mode. The multi-mode transceiver includes a first element coupled to the first circuit. The multi-mode transceiver includes a second element coupled to the first element and one or more ports. The multi-mode transceiver also includes a first switch, coupled to the second element and to the second circuit, that is configurable to operate the transceiver in at least one of the first mode and the second mode in conjunction with the first element and the second element.

Claims

1. A multi-mode transceiver comprising:

a first circuit that is configurable to operate as one of a transmitter and a receiver in a first mode;

a second circuit that is configurable to operate as one of the transmitter and the receiver in a second mode;

a first element coupled to the first circuit;

a second element coupled to the first element and one or more ports; and

a first switch, coupled to the second element and to the second circuit, that is configurable to operate the multi-mode transceiver in at least one of the first mode and the second mode in conjunction with the first element and the second element.

2. The multi-mode transceiver as claimed in claim 1, wherein the first element comprises a second switch and the second element comprises a transformer that acts as a switch.

3. The multi-mode transceiver as claimed in claim 2, wherein the first switch and the second switch are metal oxide semiconductor switches that are responsive to a control signal to operate the multi-mode transceiver in at least one of the first mode and the second mode in conjunction with the transformer, the control signal being generated based on a desired mode of operation of the multi-mode transceiver.

4. The multi-mode transceiver as claimed in claim 2, wherein the first switch, the second switch and the transformer are coupled between at least one of:

a power amplifier of the multi-mode transceiver and the one or more ports; and

the one or more ports and a low noise amplifier of the multi-mode transceiver.

5. The multi-mode transceiver as claimed in claim 1, wherein the first element comprises a first capacitor and the second element comprises a second capacitor.

6. The multi-mode transceiver as claimed in claim 5, wherein the first switch is a metal oxide semiconductor switch that is responsive to a control signal to operate the multi-mode transceiver in at least one of the first mode and the second mode in conjunction with the first capacitor and the second capacitor, the control signal being generated based on a desired mode of operation of the multi-mode transceiver.

7. The multi-mode transceiver as claimed in claim 6, wherein the first capacitor, the second capacitor and the first switch are coupled between at least one of:

a power amplifier of the multi-mode transceiver and the one or more ports; and

the one or more ports and a low noise amplifier of the multi-mode transceiver.

8. The multi-mode transceiver as claimed in claim 1, wherein the first circuit comprises at least one of:

a power amplifier;

a pre-power amplifier; and

a low noise amplifier.

9. The multi-mode transceiver as claimed in claim 1, wherein the second circuit comprises at least one of:

a power amplifier;

a pre-power amplifier; and

a low noise amplifier.

11. The multi-mode transceiver as claimed in claim 1, wherein the first mode is at least one of a wireless local area network mode, a bluetooth mode, a zigbee mode, a 3G mode, a 2.5G mode and a 2G mode.

12. The multi-mode transceiver as claimed in claim 1, wherein the second mode is at least one of a wireless local area network mode, a bluetooth mode, a zigbee mode, a 3G mode, a 2.5G mode and a 2G mode.

10. The multi-mode transceiver as claimed 1, wherein the one or more ports comprise at least one of:

a radio frequency port;

a wireless local area network port;

a bluetooth port;

a zigbee port;

a 3G port;

a 2G port; and

a 2.5G port.

13. A multi-mode transmitter comprising:

a first circuit that is configurable to operate in a first mode;

a second circuit that is configurable to operate in a second mode;

a transformer, coupled to the first circuit and the second circuit, that acts as a switch to operate the multi-mode transmitter in one of the first mode and the second mode; and

a plurality of switches, coupled to the transformer, that are responsive to a biasing voltage to operate the multi-mode transmitter in one of the first mode and the second mode in conjunction with the transformer, the biasing voltage being generated based on a desired mode of operation of the multi-mode transmitter.

14. The multi-mode transmitter as claimed in claim 13 and further comprising:

a biasing circuit coupled to the plurality of switches to generate the biasing voltage based on the desired mode of operation of the multi-mode transmitter.

15. The multi-mode transmitter as claimed in claim 13, wherein the plurality of switches and the transformer are coupled between a pre-power amplifier and a power amplifier of the multi-mode transmitter.

16. The multi-mode transmitter as claimed in claim 13, wherein the first mode is at least one of 2G mode and 2.5G mode, and the second mode is a 3G mode.

17. A multi-mode transceiver comprising:

a first circuit that is configurable to operate as one of a transmitter and a receiver in a first mode;

a second circuit that is configurable to operate as one of the transmitter and the receiver in a second mode;

a first capacitor coupled to one or more ports and the first circuit;

a second capacitor coupled to the one or more ports, the first capacitor and the second circuit; and

a switch, coupled to the second capacitor, that is responsive to a control signal to operate the multi-mode transceiver in at least one of the first mode and the second mode in conjunction with the first capacitor and the second capacitor, the control signal being generated based on a desired mode of operation of the multi-mode transceiver.

18. The multi-mode transceiver as claimed in claim 17, wherein the switch is a metal oxide semiconductor switch.

19. The multi-mode transceiver as claimed in claim 17, wherein the first mode is a wireless local area network mode and the second mode is a bluetooth mode.