Transceiver system and method of using same

• US 20060084392A1
• Filed: 10/15/2004
• Published: 04/20/2006
• Est. Priority Date: 10/15/2004
• Status: Active Grant

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Castaneda, Jesus A., Marholev, Bojko F.
• Granted Patent: US 7,274,913 B2
• Time in Patent Office: Days
• US Class Current: 455/78
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/48 Transceivers

Abstract

A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer includes a primary side connected to first and second I/O ports and a secondary side connected to the operational section. The switching device is coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.

Claims

1. A system, comprising:

an operational section including a controller; and

an input/output (I/O) section coupled to the operational section, the I/O section comprising,

a transformer including a primary side connected to first and second I/O ports and a secondary side connected to the operational section, and

a switching device coupled to the controller and between the first and second I/O ports and a bias port, such that, under control of the controller, the switching device connects one of the first and second I/O ports to the bias port.

2. The system of claim 1, wherein the switching device comprises:

a first transistor coupled between the first port and the bias port; and

a second transistor coupled between the second port and the bias port.

3. The system of claim 2, wherein the first and second transistors are NMOS devices and the bias port is a ground port.

4. The system of claim 2, wherein the first and second transistors are PMOS device and the bias port is a power source port.

5. The system of claim 1, further comprising:

a first bond wire connected between the first port and a first node, the first node also being connected to a first end of the primary side of the transformer and the switching device;

a second bond wire connected between the second port and a second node, the second node also being connected to a second end of the primary side of the transformer and the switching device; and

a compensation device connected between one of the first and second nodes and a respective one of the first and second ports, wherein the compensation device reduces impedance caused by inductance of a respective one of the first or second bond wires.

6. The system of claim 5, further comprising:

another compensation device connected between another one of the first and second nodes and a respective one of the first and second ports, wherein the another compensation device reduces impedance caused by inductance of a respective one of the first or second bond wires.

7. The system of claim 6, further comprising:

a tuning port; and

an adjustable compensation device coupled between the switching device, the bias port, and the tuning port, wherein the adjustable compensation device tunes the bias port to substantially ideal ground.

8. The system of claim 7, further comprising:

a center tap node coupled to a center tap of the secondary side of the transformer.

9. The system of claim 8, further comprising:

a capacitor coupled between the center tap of the secondary side of the transformer and the adjustable compensation device.

10. The system of claim 1, further comprising:

a tuning port; and

an adjustable compensation device coupled between the switching device, the bias port, and the tuning port, wherein the adjustable compensation device tunes the bias port to substantially ideal ground.

11. The system of claim 10, further comprising:

a center tap node coupled to a center tap of the secondary side of the transformer; and

a capacitor coupled between the center tap of the secondary side of the transformer and the adjustable compensation device.

12. The system of claim 1, wherein the operational section further comprises:

a first amplifier used to process signals received from the I/O section; and

a second amplifier used to process signals transmitted to the I/O section,

wherein the controller controls whether signals are transmitted to or received from the I/O section.

13. The system of claim 1, further comprising:

a power port coupling a power source located external to the system to the secondary side of the transformer.

14. The system of claim 1, wherein the operational section and the I/O section are located on a chip, and the system further comprises:

a board coupled to the chip, the board comprising an antenna coupled to the first and second ports of the chip.

15. The system of claim 14, wherein:

the antenna is coupled to the first port when the second port is connected to the bias port; and

the antenna is coupled to the second port when the first port is connected to the bias port.

16. The system of claim 14, wherein:

the antenna is coupled to a transmitting portion of the operational section when the first port is coupled to the bias port; and

the antenna is coupled to a receiving portion of the operational section when the second port is coupled to the bias port.

17. The system of claim 1, wherein the operational section and the I/O section are located on a chip and the system further comprises:

a board coupled to the chip, the board comprising,

a first antenna coupled to the first port of the chip; and

a second antenna coupled to the second port of the chip.

18. The system of claim 1, wherein the operational section and the I/O section are located on a chip and the system further comprises:

a board coupled to the chip, the board comprising,

an antenna;

a second switching device; and

an amplifier,

wherein the second switching device is coupled between the antenna and the second port of the chip, and

wherein the amplifier is coupled between the second switching device and the first port of the chip.

19. A method, comprising:

(a) receiving a control signal from a controller in an operational section of a chip at a switching device in an I/O section of a chip;

(b) coupling a first one of first and second ports of the chip to a bias port using the switching device based on the control signal; and

(c) using a second one of the first and second ports of the chip to transmit or receive signals.

20. The method of claim 19, wherein step (b) comprises:

coupling the bias port to one of ground or a power source.