GAIN CONTROL IN A MULTIPLE RF TRANSCEIVER INTEGRATED CIRCUIT

• US 20100222011A1
• Filed: 05/14/2010
• Published: 09/02/2010
• Est. Priority Date: 04/04/2005
• Status: Active Grant

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Behzad, Arya Reza
• Granted Patent: US 8,472,901 B2
• Time in Patent Office: Days
• US Class Current: 455/77
• CPC Class Codes: H03G 3/3042 in modulators, frequency-changers, transmitters or power amplifiers transmission power control in bidirectional transmission systems H04W52/04
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas

Abstract

A radio frequency (RF) transceiver integrated circuit (IC) includes a plurality of baseband Tx sections, a plurality of RF Tx sections, a plurality of RF Rx sections, and a plurality of baseband Rx sections. The RF transceiver IC further includes a static digital interface, a dynamic digital interface, and gain control, distribution, and buffering circuitry. Static digital interfaces are operable to receive static gain control commands from a coupled baseband processor. The dynamic digital interface is also operable to receive dynamic gain control commands from the coupled baseband processor. The gain control, distribution, and buffering circuitry is operable to apply the static gain control commands and dynamic gain control commands to at least some of the plurality of baseband Tx sections, the plurality of RF Tx sections, the plurality of RF Rx sections, and the plurality of baseband Rx sections.

Claims

1. A radio frequency (RF) transmitter (Tx), comprising:

a plurality of baseband Tx sections, each operable to receive, filter, and gain adjust a respective Tx baseband signal;

a plurality of RF Tx sections, each operable to receive, filter, gain adjust, and up convert a respective Tx baseband signal to produce a respective Tx RF signal; and

a baseband processor operable to produce static gain control commands corresponding to static gain settings enacted during calibration operations and dynamic gain control commands corresponding to dynamic gain settings enacted during non-calibration operations and to provide the static gain control commands and the dynamic gain control commands to at least some of the plurality of baseband Tx sections and the plurality of RF Tx sections.

2. The RF transmitter of claim 1, wherein:

the static gain control commands correspond to static gain settings enacted over multiple RF frame cycles; and

the dynamic gain control commands correspond to dynamic gain settings enacted over an individual RF frame cycle.

3. The RF transmitter of claim 1, further comprising:

gain control circuitry operable to apply the static gain control commands and the dynamic gain control commands to the at least some of the plurality of baseband Tx sections and the plurality of RF Tx sections.

4. The RF transmitter of claim 3, wherein, based upon the static gain control commands, the gain control circuitry is operable to disable the dynamic gain control commands during calibration of the RF transmitter.

5. The RF transmitter of claim 3, wherein:

at least one of the static gain control commands comprises a multiple section selection command; and

the gain control circuitry is operable to apply one dynamic gain control command to multiple baseband Tx sections or multiple RF Tx sections based upon the multiple section selection command.

6. The RF transmitter of claim 3, wherein the dynamic gain control commands comprise:

a section selection command, the gain control circuitry operable to select one of the plurality of baseband Tx sections and the plurality of RF Tx sections based upon the section selection command; and

a section gain control command, the gain control circuitry operable to adjust the gain of at least one adjustable gain element of the selected section based upon the section gain control command.

7. The RF transmitter of claim 3, wherein the dynamic gain control commands comprise:

a section selection command, the gain control circuitry operable to select one of the plurality of baseband Tx sections and the plurality of RF Tx sections based upon the section selection command;

an element selection command, the gain control circuitry operable to select an adjustable gain element of the selected section based upon the element selection command; and

an element gain control command, the gain control circuitry operable to adjust the gain of the selected adjustable gain element of the selected section based upon the element gain control command.

8. A radio frequency (RF) transceiver Integrated Circuit (IC) comprising:

a plurality of baseband Rx sections operable to receive, filter, and gain adjust respective Rx baseband signals;

a plurality of baseband Tx sections operable to receive, filter, and gain adjust respective Tx baseband signals;

a plurality of RF Tx sections, each operable to receive, filter, gain adjust, and up convert a respective Tx baseband signal to produce a respective Tx RF signal;

a plurality of RF Rx sections, each operable to receive, filter, gain adjust, and down convert a respective Rx RF signal to produce a respective Rx baseband signal; and

a baseband processor operable to produce static gain control commands corresponding to static gain settings enacted during calibration operations and dynamic gain control commands corresponding to dynamic gain settings enacted during non-calibration operations and to provide the static gain control commands and the dynamic gain control commands to at least some of the plurality of baseband Rx sections, the plurality of baseband Tx sections, the plurality of RF Tx sections and the plurality of RF Rx sections.

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

the static gain control commands correspond to static gain settings enacted over multiple RF frame cycles; and

the dynamic gain control commands correspond to dynamic gain settings enacted over an individual RF frame cycle.

10. The RF transceiver IC of claim 8, further comprising:

a first RF transceiver section and a second RF transceiver section, each of the first RF transceiver section and the second RF transceiver section including a respective plurality of RF Tx sections and a respective plurality of RF Rx sections.

11. The RF transceiver IC of claim 10, further comprising:

a static digital interface operable to receive the static gain control commands from the baseband processor, the static digital interface residing adjacent a first edge of the RF transceiver IC;

a first dynamic digital interface operable to receive the dynamic gain control commands from the baseband processor for application to the first RF transceiver section, the first dynamic digital interface residing adjacent a second edge of the RF transceiver IC; and

a second dynamic digital interface operable to receive the dynamic gain control commands from the baseband processor for application to the second RF transceiver section, the second dynamic digital interface residing adjacent a third edge of the RF transceiver IC opposite the second edge of the RF transceiver IC.

12. The RF transceiver IC of claim 8, further comprising:

gain control circuitry operable to apply the static gain control commands and the dynamic gain control commands to the at least some of the plurality of baseband Tx sections, the plurality of RF Tx sections, the plurality of RF Tx sections and the plurality of RF Rx sections.

13. The RF transceiver IC of claim 12, wherein, based upon the static gain control commands, the gain control circuitry is operable to disable dynamic gain control commands during calibration of the RF transceiver IC.

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

at least one of the static gain control commands comprises a multiple section selection command; and

the gain control circuitry is operable to apply one dynamic gain control command to multiple baseband Tx sections, multiple RF Tx sections, multiple RF Rx sections, or multiple baseband Rx sections based upon the multiple section selection command.

15. The RF transceiver IC of claim 12, wherein the dynamic gain control commands comprise:

a section selection command, the gain control circuitry operable to select one of the plurality of baseband Tx sections, the plurality of RF Tx sections, the plurality of RF Rx sections, and the plurality of baseband Rx sections based upon the section selection command; and

a section gain control command, the gain control circuitry operable to adjust the gain of at least one adjustable gain element of the selected section based upon the section gain control command.

16. A method for adjusting the gain of gain adjustable elements of an RF transmitter (Rx) having a plurality of baseband Tx sections and a plurality of RF Tx sections, comprising:

receiving static gain control commands from a baseband processor during calibration operations;

receiving dynamic gain control commands from the baseband processor during non-calibration operations of the plurality of baseband Tx sections and the plurality of RF Tx sections;

applying the static gain control commands to at least some gain adjustable elements of the plurality of baseband Tx sections and the plurality of RF Tx sections; and

applying the dynamic gain control commands to at least some gain adjustable elements of the plurality of baseband Tx sections and the plurality of RF Tx sections.

17. The method of claim 16, further comprising:

enacting the static gain control commands over multiple RF frame cycles; and

enacting the dynamic gain control commands over respective individual RF frame cycles.

18. The method of claim 16, further comprising:

enacting the static gain control commands during calibration operations; and

disabling the dynamic gain control commands during the calibration operations.

19. The method of claim 16, wherein:

applying the static gain control commands comprises selecting multiple sections of the plurality of baseband Tx sections and the plurality of RF Tx sections based upon the static gain control commands; and

applying the dynamic gain control command comprises adjusting the gain of gain adjustable elements of the selected multiple selections.

20. The method of claim 16, wherein:

applying the dynamic gain control command comprises selecting a section of the plurality of baseband Tx sections and the plurality of RF Tx sections based upon the dynamic gain control command; and

applying the dynamic gain control command further comprises adjusting the gain of gain adjustable elements of the selected section.

21. The method of claim 16, wherein:

applying the dynamic gain control command comprises selecting a section of the plurality of baseband Tx sections and the plurality of RF Tx sections;

applying the dynamic gain control command further comprises selecting a gain adjustable element of the selected section; and

applying the dynamic gain control command further comprises adjusting the gain of the selected gain adjustable element of the selected section.