Inductive powering for a mobile communication device and method for use therewith

• US 7,706,771 B2
• Filed: 02/08/2007
• Issued: 04/27/2010
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza (Reza)
• Primary Examiner(s): Jackson; Blane J
• Application Number:
  US11/703,883
• Publication Number:
  US 20080194300A1
• Time in Patent Office: 1,174 Days
• Field of Search: 455/343.1, 455/572, 455/573, 455/574, 455/343.5, 455/343.6
• US Class Current: 455/343.1
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3296 by lowering the supply or operating voltage
• CPC Class Codes: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A voice data and RF integrated circuit (IC) receives at least one power status signal indicating an inductive power status of an off-chip inductive power module, the inductive power status including an inductive power ready state, and the at least one power status signal further indicating a battery power status of a battery. A selected one of a plurality of power modes is determined based on the at least one power status signal. A power mode signal is generated based on the selected one of the plurality of power modes. A plurality of power supply signals are generated based on the power mode signal.

Claims

1. A communication device comprising:

voice data and RF integrated circuit (IC) that includes;

a memory module that stores at least one application having a plurality of power modes; and

a processing module, coupled to the memory module, that executes the plurality of operational instructions and that determines a selected one of the plurality of power modes, and generates a power mode signal based on the selected one of the plurality of power modes; and

an off-chip power management circuit, coupled to the processing module, an off-chip inductive power module and coupleable to at least one alternative power source, that receives the power mode signal and that generates a plurality of power supply signals, based on the power mode signal, from one of, a inductive power signal from the off-chip inductive power module, and an alternative power signal from the at least one alternative power source, wherein the off-chip power management circuit adjusts a supply voltage in response to the power mode signal.

2. The communication device of claim 1 wherein the off-chip power management module generates a power status signal to the processing module that indicates an inductive power status of the off-chip inductive power module, the inductive power status including an inductive power ready state.

3. The communication device of claim 2 wherein the at least one alternative power source includes a battery and the power status signal further indicates a battery power status of the battery.

4. The communication device of claim 3 wherein the processing module determines a first power mode when the battery power status is in a normal state and determines a second power mode when the battery power status is a low state and the inductive power status is in the inductive power ready state.

5. The communication device of claim 3 wherein voice data and RF IC further includes a transmitter and the processing module causes the transmitter to transmit a low power message in response to a change from the first power mode to the second power mode.

6. The communication device of claim 1 wherein the off chip power management circuit discontinues the generation of an additional supply voltage in response to the power mode signal.

7. The communication device of claim 1 wherein the off-chip power management circuit adjusts a supply current limit in response to the power mode signal.

8. The communication device of claim 1 wherein the voice data and RF IC further includes:

an interface module that can be selectively activated by the processing module based on the current use characteristics and wherein the processing module generates the power mode signal that commands the off-chip power management circuit to discontinue the generation of a supply voltage to power the interface module.

9. The communication device of claim 8 wherein the interface module interfaces the voice data RF IC to a peripheral device that can be selectively activated by the processing module based on the current use characteristics and wherein the processing module generates the power mode signal that commands the off-chip power management circuit to discontinue generation of a supply voltage to power the peripheral device.

10. A voice data and RF integrated circuit (IC) comprising:

a memory module that stores at least one application having a plurality of power modes; and

a processing module, coupled to the memory module, that executes the plurality of operational instructions and that determines a selected one of the plurality of power modes, and generates a power mode signal based on the selected one of the plurality of power modes;

an on-chip power management circuit, coupled to the processing module, an off-chip inductive power module and coupleable to at least one alternative power source, that receives the power mode signal and that generates a plurality of power supply signals, based on the power mode signal, from one of, a inductive power signal from the off-chip inductive power module, and an alternative power signal from the at least one alternative power source; and

an interface module that can be selectively activated by the processing module based on the current use characteristics and wherein the processing module to generate the power mode signal that commands the on-chip power management circuit to discontinue the generation of a supply voltage to power the interface module.

11. The voice data and RF IC of claim 10 wherein the on-chip power management module generates a power status signal to the processing module that indicates an inductive power status of the off-chip inductive power module, the inductive power status including an inductive power ready state.

12. The voice data and RF IC of claim 11 wherein the at least one alternative power source includes a battery and the power status signal further indicates a battery power status of the battery.

13. The voice data and RF IC of claim 12 wherein the processing module determines a first power mode when the battery power status is in a normal state and determines a second power mode when the battery power status is a low state and the inductive power status is in the inductive power ready state.

14. The voice data and RF IC of claim 12 further comprising:

a transmitter and the processing module causes the transmitter to transmit a low power message in response to a change from the first power mode to the second power mode.

15. The voice data and RF IC of claim 10 wherein the on-chip power management circuit discontinues the generation of an additional supply voltage in response to the power mode signal.

16. The voice data and RF IC of claim 10 wherein the on-chip power management circuit adjusts a supply voltage in response to the power mode signal.

17. The voice data and RF IC of claim 10 wherein the on-chip power management circuit adjusts a supply current limit in response to the power mode signal.

18. The voice data and RF IC of claim 10 wherein the interface module interfaces the voice data RF IC to a peripheral device that can be selectively activated by the processing module based on the current use characteristics and wherein the processing module generates the power mode signal that commands the on-chip power management circuit to discontinue generation of a supply voltage to power the peripheral device.

19. A method for use in a voice data and RF integrated circuit (IC) comprising:

receiving at least one power status signal indicating an inductive power status of an off-chip inductive power module, the inductive power status including an inductive power ready state, and the at least one power status signal further indicating a battery power status of a battery;

determining a selected one of a plurality of power modes based on the at least one power status signal;

generating a power mode signal based on the selected one of the plurality of power modes; and

generating a plurality of power supply signals, based on the power mode signal including adjusting a supply voltage in response to the power mode signal.

20. The method of claim 19 wherein the wherein the step of determining a power mode includes determining a first power mode when the battery power status is in a normal state and determining a second power mode when the battery power status is a low state and the inductive power status is in the inductive power ready state.

21. The method of claim 19 further comprising:

transmitting a low power message in response to a change from the first power mode to the second power mode.

22. The method of claim 19 wherein the step of generating the plurality of power supply signals includes discontinuing the generation of an additional supply voltage in response to the power mode signal.

23. The method of claim 19 wherein the step of generating the plurality of power supply signals includes adjusting a supply current limit in response to the power mode signal.