Local oscillation routing plan applicable to a multiple RF band RF MIMO transceiver

• US 8,180,311 B2
• Filed: 03/17/2008
• Issued: 05/15/2012
• Est. Priority Date: 04/04/2005
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Behzad, Arya Reza, Darabi, Hooman
• Primary Examiner(s): Vuong, Quochien B
• Application Number:
  US12/049,771
• Publication Number:
  US 20080304435A1
• Time in Patent Office: 1,520 Days
• Field of Search: 455/41.1, 455/41.2, 455/73, 455/313, 455/323, 455/333, 455/334, 455/552.1, 455/560, 455/561, 455/562.1, 370/901, 370/908
• US Class Current: 455/323
• CPC Class Codes: H04B 1/0082 with a common local oscillator for more than one band

Abstract

Local oscillation circuitry for use in an RF transceiver Integrated Circuit (IC) includes local oscillation generation circuitry operable to produce a local oscillation and local oscillation distribution circuitry. The local oscillation distribution circuitry includes a splitting circuit, a first distribution portion, and a second distribution portion. The splitting circuit receives the local oscillation and produces multiple copies of the local oscillation. The first distribution portion produces a first local oscillation corresponding to a first RF band and a second local oscillation corresponding to a second RF band based and to provide the first local oscillation and the second local oscillation to a first RF transceiver group. The second distribution portion produces a first local oscillation and a second local oscillation and provides the first local oscillation and the second local oscillation to the second RF transceiver group.

Claims

1. A Radio Frequency (RF) transceiver Integrated Circuit (IC) comprising:

a first RF transceiver module that is operable to service communications within at least one RF band;

a second RF transceiver module that is operable to service the communications within the at least one RF band, wherein the second RF transceiver module resides in substantial symmetry with the first RF transceiver module;

local oscillation generation circuitry operable to produce a local oscillation; and

local oscillation distribution circuitry coupled to the local oscillation generation circuitry, to the first RF transceiver module, and to the second RF transceiver module, the local oscillation distribution circuitry including;

splitting circuitry operable to receive the local oscillation from the local oscillation generation circuitry and to produce multiple phase matched copies of the local oscillation;

a first distribution portion coupled to the splitting circuitry and operable to produce a first local oscillation corresponding to the at least one RF band based upon the local oscillation and to provide the first local oscillation to the first RF transceiver module; and

a second distribution portion coupled to the splitting circuitry and operable to produce a second local oscillation corresponding to the at least one RF band based upon the local oscillation and to provide the second local oscillation.

2. The RF transceiver IC of claim 1, wherein the local oscillation generation circuitry resides substantially along a center line of symmetry of the RF transceiver IC.

3. The RF transceiver IC of claim 1, wherein the splitting circuitry of the local oscillation distribution circuitry resides substantially along a center line of symmetry of the RF transceiver IC.

4. The RF transceiver IC of claim 1, wherein the first distribution portion and the second distribution portion of the local oscillation distribution circuitry reside in substantial symmetry about a center line of symmetry of the RF transceiver IC.

5. The RF transceiver IC of claim 1, further comprising:

a first baseband section having a first Rx baseband section and a first Tx baseband section;

a second baseband section having a second Rx baseband section and a second Tx baseband section; and

wherein the first baseband section and the second baseband section reside in substantial symmetry about a center line of symmetry of the RF transceiver IC.

6. The RF transceiver IC of claim 1, wherein:

the first RF transceiver module includes a first RF band transmitter, a first RF band receiver, a second RF band transmitter, and a second RF band receiver; and

the second RF transceiver module includes a first RF band transmitter, a first RF band receiver, a second RF band transmitter, and a second RF band receiver.

7. The RF transceiver IC of claim 6, wherein:

the first RF band transmitter of the first RF transceiver module resides in substantial symmetry with the first RF band transmitter of the second RF transceiver module about a center line of symmetry of the RF transceiver IC;

the second RF band transmitter of the first RF transceiver module resides in substantial symmetry with the second RF band transmitter of the second RF transceiver module about the center line of symmetry of the RF transceiver IC;

the first RF band receiver of the first RF transceiver module resides in substantial symmetry with the first RF band receiver of the second RF transceiver module about the center line of symmetry of the RF transceiver IC; and

the second RF band receiver of the first RF transceiver module resides in substantial symmetry with the second RF band receiver of the second RF transceiver module about the center line of symmetry of the RF transceiver IC.

8. The RF transceiver IC of claim 7, wherein:

a sequential order of position of first RF transceiver module components from the center line of symmetry of the RF transceiver IC is the second RF band transmitter, the first RF band transmitter, the second RF band receiver, and the first RF band receiver; and

a sequential order of position of second RF transceiver module components from the center line of symmetry of the RF transceiver integrated circuit is the second RF band transmitter, the first RF band transmitter, the second RF band receiver, and the first RF band receiver.

9. The RF transceiver IC of claim 7, wherein:

a sequential order of position of first transceiver group components from the center line of symmetry of the RF transceiver IC is the second RF band transmitter, the second RF band receiver, the first RF band transmitter, and the first RF band receiver; and

a sequential order of position from the center line of symmetry of the RF transceiver integrated circuit of second transceiver group components is the second RF band transmitter, the second RF band receiver, the first RF band transmitter, and the first RF band receiver.

10. The RF transceiver IC of claim 1, wherein:

the first distribution portion of the local oscillation distribution circuitry resides between a first baseband section and the first RF transceiver module; and

the second distribution portion of the local oscillation distribution circuitry further resides between a second baseband section and the second RF transceiver module.

11. The RF transceiver IC of claim 1, wherein:

the first RF transceiver module includes a first RF band transmitter and a first RF band receiver; and

the second RF transceiver module includes a first RF band transmitter and a first RF band receiver.

12. A Radio Frequency (RF) transceiver Integrated Circuit (IC) comprising:

a first RF transceiver module that is operable to service communications within at least one RF band;

a second RF transceiver module that is operable to service the communications within the at least one RF band, wherein the second RF transceiver module resides in substantial symmetry with the first RF transceiver module;

local oscillation generation circuitry operable to produce a local oscillation;

local oscillation splitting circuitry coupled to the local oscillation generation circuitry and operable to receive the local oscillation from the local oscillation generation circuitry and to produce multiple phase matched copies of the local oscillation, the local oscillation splitting circuitry residing substantially along a center line of symmetry of the RF transceiver IC; and

local oscillation distribution circuitry coupled to the local oscillation splitting circuitry and operable to couple a first local oscillation received from the local oscillation splitting circuitry to the first RF transceiver module and operable to couple a second local oscillation received from the local oscillation splitting circuitry to the second RF transceiver module.

13. The RF transceiver IC of claim 12, wherein the local oscillation distribution circuitry comprises:

first local oscillation distribution circuitry operable to couple the first local oscillation received from the local oscillation splitting circuitry to the first RF transceiver module;

second local oscillation distribution circuitry operable to couple the second local oscillation received from the local oscillation splitting circuitry to the second RF transceiver module; and

wherein the first local oscillation distribution circuitry and the second local oscillation distribution circuitry reside in substantial symmetry about a center line of symmetry of the RF transceiver IC.

14. The RF transceiver IC of claim 12, wherein the local oscillation generation circuitry resides substantially along a center line of symmetry of the RF transceiver IC.

15. The RF transceiver IC of claim 12, wherein the local oscillation splitting circuitry resides substantially along a center line of symmetry of the RF transceiver IC.

16. The RF transceiver IC of claim 12, further comprising:

a first baseband section coupled to the first RF transceiver module;

a second baseband section coupled to the second RF transceiver module; and

wherein the first baseband section and the second baseband section reside in substantial symmetry about a center line of symmetry of the RF transceiver IC.

17. The RF transceiver IC of claim 12, wherein:

a first portion of the local oscillation distribution circuitry resides between the first baseband section and the first RF transceiver module; and

a second portion of the local oscillation distribution circuitry resides between the second baseband section and the second RF transceiver module.

18. The RF transceiver IC of claim 12, wherein:

the first RF transceiver module includes a first RF band transmitter, a first RF band receiver, a second RF band transmitter, and a second RF band receiver; and

the second RF transceiver module includes a first RF band transmitter, a first RF band receiver, a second RF band transmitter, and a second RF band receiver.

19. The RF transceiver IC of claim 12, wherein:

the first RF transceiver module includes a first RF band transmitter and a first RF band receiver; and

the second RF transceiver module includes a first RF band transmitter and a first RF band receiver.