Method and system for single chip WLAN and bluetooth radios on a single CMOS substrate

• US 8,600,300 B2
• Filed: 12/31/2006
• Issued: 12/03/2013
• Est. Priority Date: 12/06/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Lee, Chungyeol Paul, Marholev, Bojko, Behzad, Arya, Gonikberg, Mark, Ibrahim, Brima Babatunde, Varghese, Thomas
• Primary Examiner(s): Wendell, Andrew
• Assistant Examiner(s): Bilodeau, David
• Application Number:
  US11/618,869
• Publication Number:
  US 20080139123A1
• Time in Patent Office: 2,529 Days
• Field of Search: 455/63.1, 455/41.2, 375/224, 323312-317
• US Class Current: 455/41.2
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04W 88/00 Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices

Abstract

Aspects of a method and system for single chip WLAN and Bluetooth radios on a single CMOS substrate are presented. Aspects of the system may include a WLAN receiver circuit within a substrate of a single chip that enables reception of WLAN signals, and a Bluetooth receiver circuit within the same substrate that enables reception of Bluetooth signals. The WLAN receiver circuit and Bluetooth receiver circuit may utilize a single low noise amplifier circuit that enables reception of the WLAN signals and Bluetooth signals. Aspects of the system may also include a WLAN transmitter circuit within a substrate of a single chip that enables transmission of WLAN signals, and a Bluetooth transmitter circuit within the same substrate that enables transmission of Bluetooth signals. The WLAN transmitter circuit and Bluetooth transmitter circuit may utilize a single power amplifier circuit that enables transmission of the WLAN signals and Bluetooth signals.

Claims

1. A system for configuring circuitry, the system comprising:

a resistor calibration circuit that enables generation of a plurality of distinct codewords comprising a first codeword and a second codeword based on at least one bias current received from a wireless local area network bandgap reference circuit and a Bluetooth bandgap reference circuit;

a wireless local area network bandgap reference circuit that enables generation of at least one wireless local area network bias current signal based on said first of said generated plurality of distinct codewords from said resistor calibration circuit; and

a Bluetooth bandgap reference circuit that enables generation of at least one Bluetooth bias current signal based on said second of said generated plurality of distinct codewords from said resistor calibration circuit, wherein said resistor calibration circuit is shared with said wireless local area network bandgap reference circuit,

wherein said wireless local area network bandgap reference circuit, said Bluetooth bandgap reference circuit, and said resistor calibration circuit are integrated on a single chip having a wireless local area network and a Bluetooth radio.

2. The system according to claim 1, wherein said at least one wireless local area network bias current signal enables reception of wireless local area signals via at least one wireless local area network receiver circuit within a substrate of said single chip.

3. The system according to claim 1, wherein said at least one Bluetooth bias current signal enables reception of Bluetooth signals via at least one Bluetooth receiver circuit within said substrate of said single chip.

4. The system according to claim 1, wherein said resistor calibration circuit enables measurement of a voltage induced across a variable resistor within a substrate of said single chip based on said at least one bias current.

5. The system according to claim 4, wherein said resistor calibration circuit enables adjustment of a resistive value for said variable resistor based on a comparison of said voltage induced across said variable resistor and a voltage induced across a calibration resistor based on said at least one bias current.

6. The system according to claim 5, wherein said resistor calibration circuit enables said generation of said generated plurality of distinct codewords based on said adjustment of said resistive value for said variable resistor.

7. The system according to claim 1, wherein said first of said generated plurality of distinct codewords and said second of said generated plurality of distinct codewords are the same codeword.

8. The system according to claim 1, wherein said resistor calibration circuit enables selection of a distinct codeword from said generated plurality of distinct codewords to be said first of said generated plurality of distinct codewords.

9. The system according to claim 1, wherein said resistor calibration circuit enables selection of a distinct codeword from said generated plurality of distinct codewords to be said second of said generated plurality of distinct codewords.

10. A method for configuring circuitry, the method comprising:

enabling, by a resistor calibration circuit, generation of a plurality of distinct codewords comprising a first codeword and a second codeword based on at least one bias current received from a wireless local area network bandgap reference circuit and a Bluetooth bandgap reference circuit;

enabling, by a wireless local area network bandgap reference circuit, generation of at least one wireless local area network bias current signal based on said first of said generated plurality of distinct codewords from said resistor calibration circuit; and

enabling, by a Bluetooth bandgap reference circuit, generation of at least one Bluetooth bias current signal based on said second of said generated plurality of distinct codewords from said resistor calibration circuit, wherein said resistor calibration circuit is shared with said wireless local area network bandqap reference circuit,

wherein said wireless local area network bandgap reference circuit, said Bluetooth bandgap reference circuit, and said resistor calibration circuit are co-located on a single chip having a wireless local area network and a Bluetooth radio.

11. The method according to claim 10, comprising receiving wireless local area signals via at least one wireless local area network receiver circuit within said substrate of said single chip.

12. The method according to claim 10, comprising receiving Bluetooth signals via at least one Bluetooth receiver circuit within said substrate of said single chip.

13. The method according to claim 10, comprising measuring a voltage induced across a variable resistor within a substrate of said single chip based on said at least one bias current.

14. The method according to claim 13, comprising adjusting a resistive value for said variable resistor based on a comparison of said voltage induced across said variable resistor and a voltage induced across a calibration resistor based on said at least one bias current.

15. The method according to claim 14, comprising generating plurality of distinct codewords based on said adjustment of said resistive value for said variable resistor.

16. The method according to claim 10, wherein said first of said generated plurality of distinct codewords and said second of said generated plurality of distinct codewords are the same codeword.

17. The method according to claim 10, comprising selecting a distinct codeword from said generated plurality of distinct codewords to be said first of said generated plurality of distinct codewords.

18. The method according to claim 10, comprising selecting a distinct codeword from said generated plurality of distinct codewords to be said second of said generated plurality of distinct codewords.