Apparatus and method for protecting receive circuit in time division duplex (TDD) wireless communication system

• US 20080089252A1
• Filed: 09/04/2007
• Published: 04/17/2008
• Est. Priority Date: 10/16/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Choi, Seong-Keon
• Application Number:
  US11/899,030
• Publication Number:
  US 20080089252A1
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04B 1/44 Transmit/receive switching

Abstract

Apparatus and method for protecting a receive circuit in a Time Division Duplex (TDD) wireless communication system are provided. The apparatus includes a generator for generating a control signal to activate a first amplifier; the first amplifier for receiving an activation signal from the generator; an inverter for inverting the control signal; and a second amplifier for receiving an activation signal from the inverter.

Claims

1. A communicator in a Time Division Duplex (TDD) wireless communication system, comprising:

a generator for generating a control signal to activate a first amplifier;

the first amplifier for receiving an activation signal from the generator;

an inverter for inverting the control signal; and

a second amplifier for receiving an inactivation signal from the inverter.

2. The communicator of claim 1, wherein the first amplifier is a Power Amplifier (PA) which amplifies a transmit signal, and

the second amplifier is a Low Noise Amplifier (LNA) which amplifies a receive signal.

3. The communicator of claim 1, wherein the generator outputs a control signal for activating the first amplifier in a transmission mode, and

the generator outputs a control signal for inactivating the first amplifier in a reception mode.

4. The communicator of claim 1, wherein the inverter inverts a inactivation signal to inactivate the first amplifier and applies to the second amplifier activation signal.

5. A method for protecting a receive circuit of a communicator of a Time Division Duplex (TDD) wireless communication system, the method comprising:

generating a control signal to control a first amplifier;

activating the first amplifier using the control signal; and

inactivating a second amplifier by inverting the control signal.

6. The method of claim 5, wherein the first amplifier is a Power Amplifier (PA) which amplifies a transmit signal, and

the second amplifier is a Low Noise Amplifier (LNA) which amplifies a receive signal.

7. The method of claim 5, wherein the control signal generating step comprises:

generating a control signal to activate the first amplifier in a transmission mode; and

generating a control signal to inactivate the first amplifier in a reception mode.

8. The method of claim 5, further comprise;

inverting a inactivation signal to inactivate the first amplifier; and

applying to the second amplifier activation signal.

9. A wireless communication system comprising at least one transceiver that communicates in a Time Division Duplex (TDD) scheme, the at least one transceiver comprising:

a first amplifier for amplifying an outgoing signal via an antenna during a transmission period;

a second amplifier for amplifying a received signal received by the antenna during a receive period;

a duplexer for coupling an output of the first amplifier to the antenna and coupling an input of the second amplifier to the antenna;

a controller for generating a control signal to activate one of the first and second amplifiers while substantially simultaneously deactivating the other of the first and second amplifiers.

10. The wireless communication system of claim 9, wherein the first amplifier is a power amplifier and the second amplifier is a low-noise amplifier.

11. The wireless communication system of claim 9, wherein the controller comprises:

a signal generator that outputs a first control signal that activates and deactivates the first amplifier; and

an inverter for inverting the first control signal from the signal generator to produce a second control signal that activates and deactivates the second amplifier.

12. The wireless communication system of claim 9, wherein the controller comprises:

a signal generator that outputs a first control signal that activates and deactivates the second amplifier; and

an inverter for inverting the first control signal from the signal generator to produce a second control signal that activates and deactivates the first amplifier.

13. For use in a wireless communication system comprising at least one transceiver that communicates in a Time Division Duplex (TDD) scheme, a method of operating the transceiver comprising the steps of:

during a transmission period, amplifying in a first amplifier an outgoing signal for transmission via an antenna;

during a receive period, amplifying in a second amplifier a received signal received by the antenna;

generating control signals that selectively activate one of the first and second amplifiers while substantially simultaneously deactivating the other of the first and second amplifiers.

14. The method of claim 13, wherein the first amplifier is a power amplifier and the second amplifier is a low-noise amplifier.

15. The method of claim 13, wherein the step of generating control signals comprises the sub-steps of:

generating a first control signal that activates and deactivates the first amplifier; and

inverting the first control signal to produce a second control signal that activates and deactivates the second amplifier.

16. The method of claim 13, wherein the step of generating control signals comprises the sub-steps of:

generating a first control signal that activates and deactivates the second amplifier; and

inverting the first control signal to produce a second control signal that activates and deactivates the first amplifier.