Apparatus and method for powering wireless inter-component audio transmission

• US 20050075146A1
• Filed: 10/07/2003
• Published: 04/07/2005
• Est. Priority Date: 10/07/2003
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Kridner, Jason D.
• Application Number:
  US10/680,770
• Publication Number:
  US 20050075146A1
• Time in Patent Office: Days
• US Class Current: 455/572
• CPC Class Codes: H04B 1/1607 Supply circuits converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46

Abstract

In order to power the components providing wireless audio transmission from an audio signal source unit, the audio signal source uses the audio signal itself, after rectification and demodulation, to provide power to the components providing the wireless signal. Similarly, for an audio receiving unit, the power provided by the microphone pickup voltage can be used to detect and demodulate the wireless signal. These audio components can therefore be provided with wireless capability without requiring an external power source.

Claims

1. A audio wireless signal generating unit, the unit comprising:

audio signal source generating an audio signal, and

a signal generating unit detachably coupled to the audio signal source, the signal generating unit including;

modulation component, the modulation component responsive to the audio signal for modulating a wireless signal therewith; and

a power supply responsive to the audio signal for generating a voltage, the voltage powering the modulation component.

2. The unit as recited in claim 1 wherein the power supply includes a rectifying component and a filtering component.

3. The unit as recited in claim 1 wherein the modulation component includes a carrier frequency component.

4. An audio signal receiving unit, the unit comprising:

an audio signal receiving component, the audio signal receiving component generating a microphone pickup voltage; and

a wireless receiving unit, the wireless receiving unit detecting and demodulating a wireless signal, the wireless receiving unit applying an audio signal to the audio signal receiving component, the wireless receiving unit being powered by the microphone pickup voltage.

5. The audio signal receiving unit as recited in claim 4 wherein the wireless receiving unit is detachably coupled to the audio signal receiving unit.

6. The audio signal receiving unit as recited in claim 4 wherein the wireless receiving unit includes a charge pump, the charge pump increasing the microphone pickup voltage level.

7. The method of powering a device generating a wireless signal modulated with an audio signal, the method comprising using a portion of the audio signal to provide power to the device.

8. The method as recited in claim 7 wherein the using step includes rectifying and filtering the portion of the audio signal.

9. An audio system, the system comprising:

an audio signal source, the audio signal source generating an audio signal;

a wireless transmission unit receiving the audio signal, the wireless transmission unit modulating a carrier signal with the audio signal, wherein the wireless transmission unit is powered by the audio signal; and

an audio signal receiver, the audio receiver separating the audio signal from the carrier signal.

10. The system as recited in claim 9 wherein the separation of the audio signal from carrier signal is performed in a wireless receiver unit, the wireless receiver unit being detachable from the audio signal receiver, the wireless receiver unit being powered by a microphone pickup voltage.

11. In a audio receiver unit in which a wireless receiving unit is detachably coupled to an audio signal receiver, the method of powering the wireless receiving unit, the method comprising:

powering the wireless receiver unit with a microphone pickup voltage from the audio signal receiver.