Method and system for Bluetooth, near field communication and simultaneous FM transmission and reception functions

• US 7,937,107 B2
• Filed: 05/29/2007
• Issued: 05/03/2011
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: NXP USA, Inc. (NXP Semiconductors NV)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Maryam, Rofougaran, Ahmadreza
• Primary Examiner(s): Chang; Kent
• Assistant Examiner(s): Behnamian; Shahriar
• Application Number:
  US11/754,600
• Publication Number:
  US 20080233871A1
• Time in Patent Office: 1,435 Days
• Field of Search: 340/10.1, 340/572.1, 340/5.53, 455/552.1, 455/41.2, 455/185.1
• US Class Current: 455/552.1
• 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

Methods and systems for wireless communication are disclosed and may comprise generating a first signal to enable transmission and/or reception of Bluetooth signals, and clocking direct digital frequency synthesizers (DDFSs) via the first signal to enable simultaneous transmission and reception of FM and NFC signals. The first signal may be generated via a Bluetooth LOGEN or PLL, and may comprise in-phase and quadrature components. The frequency of the first signal may be within the range of 2.4 GHz to 2.483 GHz, or mixed to result in a frequency within the same range. Control word inputs may be generated to control the DDFSs, and may be adjusted to compensate for changes in frequency of the first signal. Simultaneous NFC transmission and reception may be simulated by switching the control word inputs between a plurality of values in successive time intervals to perform time division duplexing, and may occur at different frequencies.

Claims

1. A method for wireless communication, the method comprising:

in an RF chip comprising transmit and receive functions;

generating a first signal to enable transmission and/or reception of Bluetooth signals, wherein said first signal is input to a plurality of direct digital frequency synthesizers (DDFSs); and

clocking said plurality of DDFSs via said generated first signal to generate a plurality of signals, which enable simultaneous transmission and reception of frequency modulated (FM) signals, wherein said frequency modulated (FM) signals are modulated by audio or non-RFID data information, and also enable transmission and/or reception of near field communication (NFC) signals, and wherein said NFC signals are clocked by at least one of said plurality of DDFSs.

2. The method according to claim 1, comprising generating via a local oscillator generator (LOGEN), said first signal to enable said transmission and/or said reception of said Bluetooth signals.

3. The method according to claim 1, comprising generating via a phase locked loop (PLL), said first signal to enable said transmission and/or said reception of said Bluetooth signals.

4. The method according to claim 1, wherein a frequency of said first signal is within the range of 2.4 GHz to 2.483 GHz.

5. The method according to claim 1, wherein a frequency of said first signal is such that it may be frequency divided and then mixed with said first signal to result in a signal with a frequency within the range of 2.4 GHz to 2.483 GHz.

6. The method according to claim 1, wherein said generated first signal that enables said transmission and/or said reception of said Bluetooth signals comprises an in-phase component and a quadrature component.

7. The method according to claim 1, comprising generating one or more control word inputs to control each of said plurality of direct digital frequency synthesizers.

8. The method according to claim 7, comprising adjusting said generated one or more control word inputs to each of said plurality of direct digital frequency synthesizers to compensate for changes in frequency of said generated first signal.

9. The method according to claim 7, comprising simulating simultaneous NFC transmission and NFC reception by switching said generated one or more control word inputs to one or more of said plurality of direct digital frequency synthesizers.

10. The method according to claim 9, comprising switching said generated one or more control word inputs between a plurality of values in successive time intervals to perform time division duplexing of said simulated simultaneous NFC transmission and said NFC reception.

11. The method according to claim 10, wherein said NFC transmission occurs at a first frequency and said NFC reception occurs at a second frequency.

12. A system for wireless communication, the system comprising:

one or more circuits in an RF chip comprising transmit and receive functions, said one or more circuits operable to perform;

generating a first signal to enable transmission and/or reception of Bluetooth signals, wherein said first signal is input to a to a plurality of direct digital frequency synthesizers (DDFSs); and

clocking said plurality of DDFSs via said generated first signal to generate a plurality of signals, which enable simultaneous transmission and reception of frequency modulated (FM) signals, wherein said frequency modulated (FM) signals are modulated by audio or non-RFID data information, and also enable transmission and/or reception of near field communication (NFC) signals, and wherein said NFC signals are clocked by at least one of said plurality of DDFSs.

13. The system according to claim 12, comprising one or more circuits that enable generating via a LOGEN, said first signal to enable said transmission and/or said reception of said Bluetooth signals.

14. The system according to claim 12, comprising one or more circuits that enable generating via a PLL, said first signal to enable said transmission and/or said reception of said Bluetooth signals.

15. The system according to claim 12, wherein a frequency of said first signal is within the range 2.4 GHz to 2.483 GHz.

16. The system according to claim 12, wherein a frequency of said first signal is such that it may be frequency divided and then mixed with said first signal to result in a signal with a frequency within the range of 2.4 GHz to 2.483 GHz.

17. The system according to claim 12, wherein said generated first signal that enables said transmission and/or said reception of said Bluetooth signals comprises an in-phase component and a quadrature component.

18. The system according to claim 12, comprising one or more circuits that enable generating one or more control word inputs to control each of said plurality of direct digital frequency synthesizers.

19. The system according to claim 18, comprising one or more circuits that enable adjusting said generated one or more control word inputs to each of said plurality of direct digital frequency synthesizers to compensate for changes in frequency of said generated first signal.

20. The system according to claim 18, comprising one or more circuits that enable simulating simultaneous NFC transmission and NFC reception by switching said generated one or more control word inputs to one or more of said plurality of direct digital frequency synthesizers.

21. The system according to claim 20, comprising one or more circuits that enable switching said generated one or more control word inputs between a plurality of values in successive time intervals to perform time division duplexing of said simulated simultaneous NFC transmission and said NFC reception.

22. The system according to claim 21, wherein said NFC transmission occurs at a first frequency and said NFC reception occurs at a second frequency.