Distribution of shared local oscillation to multiple RF intefaces of a wireless device

• US 20070173286A1
• Filed: 02/06/2007
• Published: 07/26/2007
• Est. Priority Date: 04/04/2005
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Behzad, Arya, Carter, Keith
• Application Number:
  US11/703,421
• Publication Number:
  US 20070173286A1
• Time in Patent Office: Days
• US Class Current: 455/553.100
• CPC Class Codes: H04B 1/0082 with a common local oscillator for more than one band
• CPC Class Codes: H04M 2250/02 including a Bluetooth interface
• CPC Class Codes: H04M 2250/06 including a wireless LAN interface
• CPC Class Codes: H04W 88/00 Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices

Abstract

A Radio Frequency (RF) transceiver Integrated Circuit (IC) includes a plurality -of RF transceivers, local oscillation generation circuitry that produces a local oscillation, and local oscillation distribution circuitry. The local oscillation distribution circuitry couples to the local oscillation generation circuitry and includes a plurality of local oscillation repeater circuits. Each local oscillation repeater circuit corresponds to a respective one of the plurality of RF transceivers (transmitter, receiver, or both) Each local oscillation repeater circuit includes a local oscillation repeater circuit input, a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF transceivers, and a local oscillation repeater circuit output. Each local oscillation repeater circuit also includes a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output and a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

Claims

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

a plurality of RF transmitters, each RF transmitter operable to support the transmission of information;

a plurality of RF receivers, each RF receiver operable to support the receipt of information;

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

local oscillation distribution circuitry coupled to the local oscillation generation circuitry and having a plurality of local oscillation repeater circuits,

each local oscillation repeater circuit comprising;

a local oscillation repeater circuit input;

a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF receivers or a respective one of the plurality of RF receivers;

a local oscillation repeater circuit output;

a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output; and

a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

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

the local oscillation repeater circuit input of a first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of a second local oscillation repeater circuit couples to the local oscillation repeater circuit output of the first local oscillation repeater circuit.

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

the local oscillation distribution circuitry comprises N local oscillation repeater circuits, wherein N is a positive integer;

the local oscillation repeater circuit input of the first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of the ₂nd through Nth local oscillation repeater circuit couples to a previously adjacent local oscillation repeater circuit output.

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

an input impedance at the local oscillation repeater input of each of the plurality local oscillation repeater circuits is substantially equal; and

an output impedance at the local oscillation repeater circuit output of each of the plurality local oscillation repeater circuits is substantially equal.

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

the local oscillation generation circuitry includes an output having an output impedance; and

an output impedance at the local oscillation repeater circuit output of each of the plurality of local oscillation repeater circuits is substantially equal to the output impedance at the output of the local oscillation generation circuitry.

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

a unique local oscillation repeater circuit corresponds to each of the plurality of RF transmitters; and

a unique local oscillation repeater circuit corresponds to each of the plurality of plurality of RF receivers.

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

a plurality of RF transceivers;

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

local oscillation distribution circuitry coupled to the local oscillation generation circuitry and having a plurality of local oscillation repeater circuits,

each local oscillation repeater circuit corresponding to a respective one of the plurality of RF transceivers and comprising;

a local oscillation repeater circuit input;

a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF transceivers;

a local oscillation repeater circuit output;

a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output; and

a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

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

the local oscillation repeater circuit input of a first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of a second local oscillation repeater circuit couples to the local oscillation repeater circuit output of the first local oscillation repeater circuit.

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

the local oscillation distribution circuitry comprises N local oscillation repeater circuits, wherein N is a positive integer;

the local oscillation repeater circuit input of the first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of the 2^nd through N^th local oscillation repeater circuit couples to a previously adjacent local oscillation repeater circuit output.

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

an input impedance at the local oscillation repeater input of each of the plurality local oscillation repeater circuits is substantially equal; and

an output impedance at the local oscillation repeater circuit output of each of the plurality local oscillation repeater circuits is substantially equal.

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

the local oscillation generation circuitry includes an output having an output impedance; and

an output impedance at the local oscillation repeater circuit output of each of the plurality of local oscillation repeater circuits is substantially equal to the output impedance at the output of the local oscillation generation circuitry.

12. A wireless device that services Radio Frequency (RF) communications, the wireless device comprising:

a host processing module;

an antenna; and

a RF transceiver Integrated Circuit (IC) coupled to the host processing module and to the antenna, the RF transceiver IC comprising;

a plurality of RF transmitters, each RF transmitter operable to support the transmission of information;

a plurality of RF receivers, each RF receiver operable to support the receipt of information;

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

local oscillation distribution circuitry coupled to the local oscillation generation circuitry and having a plurality of local oscillation repeater circuits,

each local oscillation repeater circuit comprising;

a local oscillation repeater circuit input;

a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF receivers or a respective one of the plurality of RF receivers;

a local oscillation repeater circuit output;

a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output; and

a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

13. The wireless device of claim 12, wherein:

the local oscillation repeater circuit input of a first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of a second local oscillation repeater circuit couples to the local oscillation repeater circuit output of the first local oscillation repeater circuit.

14. The wireless device of claim 12, wherein:

the local oscillation distribution circuitry comprises N local oscillation repeater circuits, wherein N is a positive integer;

the local oscillation repeater circuit input of the first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of the 2^nd through N^th local oscillation repeater circuit couples to a previously adjacent local oscillation repeater circuit output.

15. The wireless device of claim 12, wherein:

an input impedance at the local oscillation repeater input of each of the plurality local oscillation repeater circuits is substantially equal; and

an output impedance at the local oscillation repeater circuit output of each of the plurality local oscillation repeater circuits is substantially equal.

16. The wireless device of claim 12, wherein:

the local oscillation generation circuitry includes an output having an output impedance; and

an output impedance at the local oscillation repeater circuit output of each of the plurality of local oscillation repeater circuits is substantially equal to the output impedance at the output of the local oscillation generation circuitry.

17. The wireless device of claim 12, wherein:

a unique local oscillation repeater circuit corresponds to each of the plurality of RF transmitters; and

a unique local oscillation repeater circuit corresponds to each of the plurality of plurality of RF receivers.

18. A wireless device that services Radio Frequency (RF) communications, the wireless device comprising:

a host processing module;

an antenna; and

a RF transceiver Integrated Circuit (IC) coupled to the host processing module and to the antenna, the RF transceiver IC comprising;

a plurality of RF transceivers;

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

local oscillation distribution circuitry coupled to the local oscillation generation circuitry and having a plurality of local oscillation repeater circuits,

each local oscillation repeater circuit corresponding to a respective one of the plurality of RF transceivers and comprising;

a local oscillation repeater circuit input;

a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF transceivers;

a local oscillation repeater circuit output;

a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output; and

a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

19. The wireless device of claim 18, wherein:

the local oscillation repeater circuit input of a first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of a second local oscillation repeater circuit couples to the local oscillation repeater circuit output of the first local oscillation repeater circuit.

20. The wireless device of claim 18, wherein:

the local oscillation distribution circuitry comprises N local oscillation repeater circuits, wherein N is a positive integer;

the local oscillation repeater circuit input of the first local oscillation repeater circuit couples to an output of the local oscillation generation circuitry; and

the local oscillation repeater circuit input of the ₂nd through Nth local oscillation repeater circuit couples to a previously adjacent local oscillation repeater circuit output.

21. The wireless device of claim 18, wherein:

an input impedance at the local oscillation repeater input of each of the plurality local oscillation repeater circuits is substantially equal; and

an output impedance at the local oscillation repeater circuit output of each of the plurality local oscillation repeater circuits is substantially equal.

22. The wireless device of claim 18, wherein:

the local oscillation generation circuitry includes an output having an output impedance; and

an output impedance at the local oscillation repeater circuit output of each of the plurality of local oscillation repeater circuits is substantially equal to the output impedance at the output of the local oscillation generation circuitry.