METHOD AND SYSTEM FOR FM TRANSMIT AND FM RECEIVE USING A TRANSFORMER AS A DUPLEXER

• US 20080231537A1
• Filed: 05/17/2007
• Published: 09/25/2008
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Maryam, Rofougaran, Ahmadreza
• Granted Patent: US 7,821,472 B2
• Time in Patent Office: Days
• US Class Current: 343/850
• CPC Class Codes: H03F 2200/129 there being a feedback over the complete amplifier
• CPC Class Codes: H03F 2200/156 One or more switches are realised in the feedback circuit of the amplifier stage
• CPC Class Codes: H03F 2200/294 the amplifier being a low noise amplifier [LNA]
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2203/7236 the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03F 3/245 with semiconductor devices only
• CPC Class Codes: H03F 3/72 Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
• CPC Class Codes: H03G 3/3068 Circuits generating control signals for both R.F. and I.F. stages
• CPC Class Codes: H03G 3/3078 Circuits generating control signals for digitally modulated signals

Abstract

Aspects of a method and system for FM transmit and FM receive using a transformer as a duplexer may include communicating radio frequency signals via an antenna coupled to primary windings of a radio frequency transformer, wherein secondary windings of the radio frequency transformer may be utilized for receiving and/or transmitting the communicated radio frequency signals. The receiving and transmitting may be operated in time division duplex mode or simultaneously. A number of windings between a pair of connector terminals of the secondary windings used for transmitting of the radio frequency signals may be less than or equal to a number of windings of the primary windings. A number of windings between a pair of connector terminals of the secondary windings used for receiving of the radio frequency signals may be greater than or equal to a number of windings of the primary windings.

Claims

1. A method for processing communication signals, the method comprising:

communicating radio frequency signals via an antenna coupled to primary windings of a radio frequency transformer, wherein secondary windings of said radio frequency transformer are utilized for receiving and/or transmitting said communicated radio frequency signals.

2. The method according to claim 1, comprising operating said receiving and said transmitting in time division duplex mode.

3. The method according to claim 1, comprising operating said receiving and said transmitting simultaneously.

4. The method according to claim 1, wherein a number of windings between a pair of connector terminals of said secondary windings used for said transmitting of said radio frequency signals, is less than or equal to a number of windings of said primary windings.

5. The method according to claim 1, wherein a number of windings between a pair of connector terminals of said secondary windings used for said receiving of said radio frequency signals, is greater than or equal to a number of windings of said primary windings.

6. The method according to claim 1, wherein said antenna is a single-ended antenna, coupled to a first terminal of said primary windings, and a second terminal of said primary windings is coupled to ground.

7. The method according to claim 1, wherein said antenna is a differential antenna and a first differential antenna terminal is coupled to a first terminal of said primary winding and a second differential antenna terminal is coupled to a second terminal of said primary winding.

8. The method according to claim 1, wherein said communicated radio frequency signals are frequency modulated.

9. The method according to claim 1, wherein said communicated radio frequency signals are Bluetooth signals

10. The method according to claim 1, wherein said communicated radio frequency signals are Wireless LAN signals.

11. A system for processing communication signals, the system comprising one or more circuits, said one or more circuits enable:

communication of radio frequency signals via an antenna coupled to primary windings of a radio frequency transformer, wherein secondary windings of said radio frequency transformer are utilized for receiving and/or transmitting said communicated radio frequency signals.

12. The system according to claim 11, wherein said one or more circuits operate said receiving and said transmitting in time division duplex mode.

13. The system according to claim 11, wherein said one or more circuits operate said receiving and said transmitting simultaneously.

14. The system according to claim 11, wherein a number of windings between a pair of connector terminals of said secondary windings used for said transmitting of said radio frequency signals, is less than or equal to a number of windings of said primary windings.

15. The system according to claim 11, wherein a number of windings between a pair of connector terminals of said secondary windings used for said receiving of said radio frequency signals, is greater than or equal to a number of windings of said primary windings.

16. The system according to claim 11, wherein said antenna is a single-ended antenna, coupled to a first terminal of said primary windings, and a second terminal of said primary windings is coupled to ground.

17. The system according to claim 11, wherein said antenna is a differential antenna and a first differential antenna terminal is coupled to a first terminal of said primary winding and a second differential antenna terminal is coupled to a second terminal of said primary winding.

18. The system according to claim 11, wherein said communicated radio frequency signals are frequency modulated.

19. The system according to claim 11, wherein said communicated radio frequency signals are Bluetooth signals

20. The system according to claim 11, wherein said communicated radio frequency signals are Wireless LAN signals.