20240014781. DEVICES AND METHODS TO CONTROL DYNAMIC AUDIO RANGE IN NON-BOOSTED AUDIO SYSTEMS simplified abstract (TEXAS INSTRUMENTS INCORPORATED)

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DEVICES AND METHODS TO CONTROL DYNAMIC AUDIO RANGE IN NON-BOOSTED AUDIO SYSTEMS

Organization Name

TEXAS INSTRUMENTS INCORPORATED

Inventor(s)

Supriyo Palit of Bangalore (IN)

DEVICES AND METHODS TO CONTROL DYNAMIC AUDIO RANGE IN NON-BOOSTED AUDIO SYSTEMS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240014781 titled 'DEVICES AND METHODS TO CONTROL DYNAMIC AUDIO RANGE IN NON-BOOSTED AUDIO SYSTEMS

Simplified Explanation

The abstract describes an audio system that includes an amplifier, regulating circuitry, and a filter. The regulating circuitry generates an audio voltage threshold signal based on various measurements and estimates, such as the supply voltage source of the system, the estimated equivalent series resistance (ESR) between the system voltage supply and amplifier voltage supply pin, and the measured output resistance of the system. From these measurements/estimates, an anti-clipping voltage limit signal is generated. Additionally, power-budget-based and current-budget-based voltage limit signals are determined based on functions of the estimated value of the voltage source. The minimum of these three voltage limit signals is selected as the audio voltage threshold signal. The measurements, estimates, and calculations are performed periodically to continually update the audio voltage threshold signal and adaptively regulate the audio system. A de-emphasis filter in the audio signal path compensates for capacitive ripple of the voltage at the amplifier's voltage supply pin.

  • The audio system includes an amplifier, regulating circuitry, and a filter.
  • The regulating circuitry generates an audio voltage threshold signal based on measurements and estimates.
  • The measurements and estimates include the supply voltage source of the system, estimated ESR, and measured output resistance.
  • An anti-clipping voltage limit signal is generated from these measurements/estimates.
  • Power-budget-based and current-budget-based voltage limit signals are determined based on functions of the estimated value of the voltage source.
  • The minimum of the three voltage limit signals is selected as the audio voltage threshold signal.
  • Periodic measurements, estimates, and calculations are performed to update the audio voltage threshold signal and adaptively regulate the audio system.
  • A de-emphasis filter compensates for capacitive ripple of the voltage at the amplifier's voltage supply pin.

Potential Applications:

  • Audio systems in various devices such as smartphones, laptops, and home entertainment systems.
  • Professional audio equipment in recording studios and concert venues.
  • Automotive audio systems in cars and other vehicles.

Problems Solved:

  • Prevents audio clipping and distortion by generating an anti-clipping voltage limit signal.
  • Compensates for capacitive ripple in the amplifier's voltage supply pin, improving audio quality.

Benefits:

  • Improved audio quality with reduced clipping and distortion.
  • Adaptive regulation of the audio system based on changing conditions.
  • Compensation for capacitive ripple, resulting in cleaner audio signals.


Original Abstract Submitted

an audio system includes an amplifier, regulating circuitry, and a filter. the regulating circuitry generates an audio voltage threshold signal based on an estimated value of the supply voltage source of the system, the estimated esr between the system voltage supply and amplifier voltage supply pin, and the measured output resistance of the system. from these measurements/estimates, an anti-clipping voltage limit signal is generated. power-budget-based and current-budget-based voltage limit signals are also determined based on first and second functions of the estimated value of the voltage source, respectively. the minimum of these three voltage limit signals is selected as the audio voltage threshold signal. the measurements, estimates and calculations are performed on a periodic basis to continually update the audio voltage threshold signal and thus adaptively regulate the audio system. a de-emphasis filter in the audio signal path compensates for capacitive ripple of the voltage at the amplifier's voltage supply pin.

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