Power management circuitry in peripheral accessories of audio devices

1. A power management circuitry for a peripheral electronic device comprising:

a power regeneration circuitry to receive a periodic sound wave from a mobile audio device and to generate a first output and a second output, wherein:

the first output is based on a regenerated power signal, and

the second output comprises an amplified DC electrical signal produced based on the periodic sound wave;

a power source selector to:

receive a first input comprising based on the first output generated by the power regeneration circuitry, and

receive a second input derived from a primary power source, and

provide a power signal output based on the first and second inputs;

a power switch circuitry;

an audio signal detection circuitry to:

detect the second output from the power regeneration circuitry, and

transmit a wake-up signal to the power switch circuitry based on the detection;

the power switch circuitry is turned on by the wake-up signal; and

the power switch circuitry couples the power source selector to a main circuitry of the peripheral electronic device, and thereby transfers the power signal output to the main circuitry of the peripheral electronic device.

2. The power management circuitry of claim 1 , further comprising an audio jack connector to couple the peripheral electronic device to the mobile audio device.

3. The power management circuitry of claim 2 , wherein the audio jack connector comprises:

a ground (GND) contact;

a microphone-in (MIC-IN) contact; and

one or more earphone channel contacts.

4. The power management circuitry of claim 3 , wherein the audio jack connector comprises one of:

a 4-contact Tip-Ring-Ring-Sleeve (TRRS) connector;

a 3-contact Tip-Ring-Sleeve (TRS) connector;

a 3.5 mm audio jack;

a 6.35 mm audio jack;

a 2.5 mm audio jack;

an RCA connector;

an XLR connector;

a banana connector; or

mono or stereo versions thereof.

5. The power management circuitry of claim 2 , wherein:

the mobile audio device comprises a secondary power source; and

the primary power source is recharged by the secondary power source via the power regeneration circuitry.

6. The power management circuitry of claim 1 , wherein the power source selector provides the power signal output based on a first power associated with the first input.

7. The power management circuitry of claim 6 , wherein the power source selector selects either the first input or the second input based on a comparison of the first power to a power consumption requirement.

8. The power management circuitry of claim 7 , wherein:

the power source selector selects the first input when the first power meets the power consumption requirement; and

the power source selector selects the second input when the first power does not meet the power consumption requirement.

9. A method for providing power management in a peripheral electronic device comprising:

enabling a power regeneration circuitry to:

receive a periodic sound wave from a mobile audio device,

convert the periodic sound wave into a first output signal comprising an amplified DC electrical signal, and

produce, based on the periodic sound wave, a second output signal comprising a regenerated power signal;

enabling a power source selector to:

receive a first input comprising the second output signal from the power regeneration circuitry and a second input from a primary power source, and

produce a power signal output;

providing a power switch circuitry;

enabling an audio signal detection circuitry to:

detect the first output signal from the power regeneration circuitry, and

transmit a wake-up signal to the power switch circuitry based on the detection, wherein

the transmitted wake-up signal turns on the power switch circuitry; and

the power switch circuitry connects the power source selector to a main circuitry the peripheral electronic device, and thereby transfers the power signal output to the main circuitry of the peripheral electronic device.

10. The method of claim 9 , wherein the mobile audio device comprises a secondary power source, and the method comprises: recharging the primary power source by the secondary power source via the power regeneration circuitry.

11. The method of claim 9 , wherein the power signal output is based on the received first input when a power level of the received first input meets a power consumption requirement.

12. A power management circuitry used in a peripheral electronic device comprising:

a power regeneration circuitry to

receive a signal comprising a periodic sound wave from a mobile audio device, and

produce an amplified DC electrical signal and a regenerated power signal based on the received signal comprising the periodic sound wave;

a power switch circuitry;

an audio signal detection circuitry to detect the amplified DC electrical signal and to transmit a wake-up signal to the power switch circuitry based on the detection;

the power switch circuitry is turned on, wherein the turning on is based on the wake-up signal; and

the power switch circuitry couples the power regeneration circuitry to a main circuitry of the peripheral electronic device and thereby transfers the regenerated power signal to the main circuitry of the peripheral electronic device.

13. The power management circuitry of claim 12 , wherein the peripheral electronic device comprises one of:

a payment card reader;

a magnetic card reader;

a printer;

headphones;

speakers;

microphones; or

hands-free versions thereof.

14. The power management circuitry of claim 12 , wherein the mobile audio device comprises one of:

a mobile phone;

a personal digital assistant (PDA);

a netbook;

a tablet computer;

a notebook computer;

a game console;

an e-book reader;

a portable video player;

or a digital audio player.

15. The power management circuitry of claim 12 , wherein:

the power switch circuitry is coupled to the power regeneration circuitry via a power source selector; and

the regenerated power signal is transferred to the main circuitry of the peripheral electronic device via the power source selector.

16. The power management circuitry of claim 15 , wherein:

the mobile audio device comprises a secondary power source; and

a primary power source is recharged by the secondary power source via the power regeneration circuitry.

17. The power management circuitry of claim 15 , wherein the regenerated power signal is transferred to the main circuitry of the peripheral electronic device based on a power level associated with the regenerated power signal.

18. The power management circuitry of claim 12 , further comprising an audio jack connector to connect the peripheral electronic device to the mobile audio device.

19. The power management circuitry of claim 12 , wherein the power regeneration circuitry comprises at least one of:

a voltage multiplier;

a transformer; and

a voltage stabilizer.