Reconfigurable acoustic transducer device

• US 8,488,813 B2
• Filed: 04/01/2009
• Issued: 07/16/2013
• Est. Priority Date: 04/01/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Martin, Steven, Goel, Atul, Buccafusca, Osvaldo
• Primary Examiner(s): Hoffberg, Robert J
• Assistant Examiner(s): Anya, Igwe U
• Application Number:
  US12/416,447
• Publication Number:
  US 20100254550A1
• Time in Patent Office: 1,567 Days
• Field of Search: 381/123
• US Class Current: 381/123
• CPC Class Codes: H04R 1/005 using digitally weighted transducing elements
• CPC Class Codes: H04R 1/227 using transducers reproducing the same frequency band
• CPC Class Codes: H04R 2400/01 Transducers used as a loudspeaker to generate sound aswell as a microphone to detect sound
• CPC Class Codes: H04R 3/00 Circuits for transducers , loudspeakers or microphones

Abstract

A device comprises: a first acoustic transducer; a second acoustic transducer; one or more transducer drivers; one or more signal receivers; and a transducer configuration device for selectively configuring connections between: (1) at least one of the first and second acoustic transducers; and (2) the one or more transducer drivers and the one or more signal receivers, according to a selected operating mode for the device among a plurality of possible operating modes.

Claims

1. A device, comprising:

a first acoustic transducer;

a second acoustic transducer;

a first transducer driver;

a second transducer driver;

a first signal receiver;

a second signal receiver;

a first switching device having a first terminal connected to the first transducer driver, a second terminal connected to the first signal receiver, and a common terminal connected to the first acoustic transducer;

a second switching device having a first terminal connected to the second transducer driver, a second terminal connected to the second signal receiver, and a common terminal connected to the second acoustic transducer;

a first transducer configuration storage device configured to select a configuration of the first switching device;

a second transducer configuration storage device configured to select a configuration of the second switching device,

wherein the first and second acoustic transducers, the first and second signal receivers, the first and second switching devices, and the first and second transducer configuration storage devices are all included within a same housing.

2. The device of claim 1, wherein the first and second transducer configuration storage devices each comprise a nonvolatile memory device.

3. The device of claim 1, wherein the first and second transducer configuration storage devices each comprise a volatile memory device.

4. The device of claim 1, wherein the first and second transducer configuration storage devices each comprise a fuse.

5. The device of claim 1, further comprising:

a supply voltage switching device receiving a supply voltage and being adapted to selectively connect the supply voltage to one or more of the first and second transducer drivers and the first and second signal receivers; and

a supply voltage configuration storage device configured to select a configuration of the supply voltage switching device.

6. The device of claim 1, wherein the selected configuration of the first storage device causes the first switching device to connect the first acoustic transducer to the first transducer driver, and causes the second switching device to connect the second acoustic transducer to the second transducer driver.

7. The device of claim 1, wherein the selected configuration of the first storage device causes the first switching device to connect the first acoustic transducer to the first transducer driver, and causes the second switching device to disconnect the second acoustic transducer from both the second transducer driver and the second signal receiver.

8. The device of claim 1, wherein the selected configuration of the first storage device causes the first switching device to connect the first acoustic transducer to the first signal receiver, and causes the second switching device to connect the second acoustic transducer to the second signal receiver.

9. The device of claim 1, wherein the selected configuration of the first storage device causes the first switching device to connect the first acoustic transducer to the first signal receiver, and causes the second switching device to disconnect the second acoustic transducer from both the second transducer driver and the second signal receiver.

10. A device, comprising:

a first acoustic transducer;

a second acoustic transducer;

one or more transducer drivers;

one or more signal receivers; and

a transducer configuration device for selectively configuring connections between;

(1) at least one of the first and second acoustic transducers; and

(2) the one or more transducer drivers and the one or more signal receivers, according to a selected operating mode for the device among a plurality of possible operating modes, comprising;

a pitch-catch operating mode wherein a probing acoustic signal is transmitted by the first transducer and a corresponding returning acoustic signal is received by the second transducer.

11. The device of claim 10, wherein the plurality of possible operating modes of the device include:

a first receive-only operating mode wherein only the first transducer receives an acoustic signal;

a second receive-only operating mode wherein the first and second transducers each receive an acoustic signal;

a first transmit-only operating mode wherein only the first transducer transmits an acoustic signal;

a second transmit-only operating mode wherein the first and second transducers each transmit an acoustic signal; and

a pulse-echo operating mode wherein a probing acoustic signal is transmitted by at least one transducer and a corresponding returning acoustic signal is received by a same transducer as transmitted the probing acoustic signal.

12. The device of claim 10, wherein the device includes one or more configuration inputs and wherein the selected operating mode is determined by one or more voltages applied to the configuration inputs.

13. The device of claim 10, wherein the device includes one or more fuses internal to the device, and wherein the selected operating mode is determined by states of the one or more fuses.

14. The device of claim 10, wherein the device includes a nonvolatile memory device storing one or more values that identify the selected operating mode of the device.

15. The device of claim 10, wherein the transducer configuration device is adapted to reconfigure connections between:

(1) at least one of the first and second acoustic transducers; and

(2) at least one of the one or more transducer drivers and the one or more signal receivers, in response to one of the transducers failing.

16. The device of claim 10, further including a power supply configuration device for selectively connecting a supply voltage to the one or more transducer drivers and the one or more signal receivers, according to the selected operating mode of the device.

17. A method of operating an acoustic transducer device having:

a first acoustic transducer, a second acoustic transducer, one or more transducer drivers, and one or more signal receivers, the method comprising;

determining a selected operating mode for the acoustic transducer device among a plurality of possible operating modes for which the acoustic transducer device could be configured, wherein said determining is based on one of;

(1) an operating mode selection device internal to the acoustic transducer device, and (2) one or more voltages applied to configuration inputs of the acoustic transducer device; and

selectively configuring connections between;

(1) at least one of the first and second acoustic transducers; and

(2) the one or more transducer drivers and the one or more signal receivers, according to the selected operating mode, wherein the plurality of possible operating modes of the device comprises;

a pitch catch operating mode wherein a probing acoustic signal is transmitted by the first transducer and a corresponding returning acoustic signal is received by the second transducer.

18. The method of claim 17, wherein the plurality of possible operating modes of the device include:

a first receive-only operating mode wherein only the first transducer receives an acoustic signal;

a second receive-only operating mode wherein the first and second transducers each receive an acoustic signal;

a first transmit-only operating mode wherein only the first transducer transmits an acoustic signal;

a second transmit-only operating mode wherein the first and second transducers each transmit an acoustic signal; and

a pulse echo operating mode wherein a probing acoustic signal is transmitted by at least one transducer and a corresponding returning acoustic signal is received by a same transducer as transmitted the probing acoustic signal.

19. The method of claim 17, wherein the operating mode selection device comprises one or more fuses internal to the acoustic transducer device, and wherein the selected operating mode is determined by states of the one or more fuses.

20. The method of claim 17, wherein the operating mode selection device comprises a nonvolatile memory device, and wherein the selected operating mode is determined by one or more values stored in the nonvolatile memory device.