Adaptive radio transceiver

• US 7,512,378 B2
• Filed: 07/20/2007
• Issued: 03/31/2009
• Est. Priority Date: 10/21/1999
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza, Khorram, Shahla, Colleran, William T., Pan, Meng-An, Rofougaran, Maryam, Chien, Hung-Ming, Rael, Jacob, Wu, Stephen, Syed, Masood, Moloudi, Shervin, Ibrahim, Brima
• Primary Examiner(s): Milord; Marceau
• Application Number:
  US11/780,905
• Publication Number:
  US 20080045162A1
• Time in Patent Office: 620 Days
• Field of Search: 455/20, 455/118, 455/85, 455/180.3, 455/323
• US Class Current: 455/20
• CPC Class Codes: H03D 3/244 combined with means for obtaining automatic gain control
• CPC Class Codes: H03J 2200/04 Alignment of a transmitter during fabrication
• CPC Class Codes: H03L 2207/12 Indirect frequency synthesis using a mixer in the phase-locked loop
• CPC Class Codes: H03L 7/0995 the oscillator comprising a ring oscillator
• CPC Class Codes: H03L 7/18 using a frequency divider or counter in the loop H03L7/20, H03L7/22 take precedence
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 17/101 for measurement of specific parameters of the transmitter or components thereof
• CPC Class Codes: H04B 17/14 of the whole transmission and reception path, e.g. self-test loop-back
• CPC Class Codes: H04B 17/19 Self-testing arrangements
• CPC Class Codes: H04B 17/20 of receivers

Abstract

An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

Claims

1. A wireless communications transceiver on a single integrated circuit chip, comprising:

a receiver;

a local oscillator;

a tunable oscillator that comprises a tuning input;

a mixer that comprises a first input, a second input and an output, the first input of the mixer being operatively coupled to the tunable oscillator, the second input of the mixer being operatively coupled to the local oscillator; and

a phase detector that comprises a first input, a second input and an output, the first input of the phase detector being operatively coupled to the output of the mixer, the output of the phase detector being operatively coupled to the tuning input,

wherein the wireless communications transceiver performs direct sequence spread spectrum modulation and performs radio frequency (RF) wireless communications.

2. The wireless communications transceiver according to claim 1, wherein the single integrated circuit chip employs complementary metal oxide semiconductor (CMOS) technology.

3. The wireless communications transceiver according to claim 2, wherein the wireless communications transceiver supports communications over a wireless local area network.

4. The wireless communications transceiver according to claim 2, wherein the wireless communications transceiver performs orthogonal frequency division modulation.

5. The wireless communications transceiver according to claim 2, wherein the wireless communications transceiver performs frequency hopping.

6. The wireless communications transceiver according to claim 2, wherein the wireless communications transceiver supports communications over a personal area network.

7. The wireless communications transceiver according to claim 2, wherein the wireless communications transceiver supports phase shift keying.

8. The wireless communications transceiver according to claim 7, wherein the phase shift keying comprises quadrature phase shift keying.

9. The wireless communications transceiver according to claim 7, wherein the phase shift keying comprises offset quadrature phase shift keying.

10. The wireless communications transceiver according to claim 7, wherein the tunable oscillator comprises a voltage controlled oscillator.

11. The wireless communications transceiver according to claim 7, comprising:

a charge pump operatively coupled between the output of the phase detector and the tuning input.

12. The wireless communications transceiver according to claim 11, comprising:

a loop filter operatively coupled between the output of the phase detector and the tuning input.

13. The wireless communications transceiver according to claim 12, comprising:

a bandpass filter operatively coupled between the output of the mixer and the first input of the phase detector.

14. The wireless communications transceiver according to claim 13, comprising:

a limiter operatively coupled between the output of the mixer and the first input of the phase detector.

15. The wireless communications transceiver according to claim 14, comprising:

a transmitter amplifier operatively coupled to the tunable oscillator.

16. The wireless communications transceiver according to claim 15, wherein the receiver comprises one or more polyphase filters.

17. The wireless communications transceiver according to claim 14, wherein the wireless communications transceiver performs orthogonal frequency division modulation.

18. The wireless communications transceiver according to claim 17, wherein the wireless communications transceiver supports communications over a wireless local area network.

19. The wireless communications transceiver according to claim 14, wherein the mixer comprises a subsampling mixer.

20. The wireless communications transceiver according to claim 1, wherein the mixer comprises a track-and-hold circuitry.

21. The wireless communications transceiver according to claim 20,

wherein the track-and-hold circuitry comprises a transistor and a current source,

wherein the transistor has an input node and an output node, the input node being operatively coupled to the first input of the mixer, the output node being operatively coupled to the output of the mixer, and

wherein the current source is operatively coupled to the output of the mixer.

22. The wireless communications transceiver according to claim 20, wherein the mixer comprises a buffer that is operatively coupled to the track-and-hold circuitry.

23. The wireless communications transceiver according to claim 22, wherein the mixer comprises a differential pair amplifier that is operatively coupled to the track-and-hold circuitry.

24. The wireless communications transceiver according to claim 20, wherein the receiver comprises one or more polyphase filters.