Tracking Power Supply Audio Amplifier for Lower Heat Loss
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Solution Overview
Problem
Existing audio power amplifiers face inefficiencies in power consumption and heat dissipation, particularly when outputting valley voltages, leading to significant power losses and reduced audio quality.
Innovation Solution
An audio system with a tracking power supply circuit that adaptively adjusts power supply voltage based on audio signal amplitude, using in-phase and anti-phase audio signals to control separate power amplifying circuits, reducing power consumption and heat dissipation while maintaining audio quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed high power supply voltage is used to ensure audio output quality, then audio quality is maintained, but power consumption increases and efficiency decreases
Solution Approach 1:
The patent implements dynamic power supply voltage adjustment by introducing a tracking power supply circuit that continuously monitors the audio signal amplitude and adapts the power supply voltage in real-time. The power supply voltage transitions from a fixed high value to a dynamically adjusted value that tracks the signal envelope, thereby reducing power consumption while maintaining audio quality when signal levels are low.
Solution Approach 2:
The patent changes the power supply voltage parameter from a constant high value to a variable value that follows the audio signal amplitude. By modifying this key parameter dynamically, the system achieves lower power consumption during low-signal periods while preserving the ability to deliver high power when needed for quality audio output.
2Power
If a fixed high power supply voltage is used to drive power amplifying circuits, then audio signal amplification is ensured, but heat dissipation increases and efficiency decreases
Solution Approach 1:
The tracking power supply circuit dynamically adjusts the power supply voltage to match the instantaneous requirements of the power amplifying circuits based on audio signal amplitude. This dynamic adjustment reduces the voltage differential across the amplifying circuits during low-signal periods, thereby reducing power loss and heat dissipation while maintaining sufficient amplification capability when signal levels are high.
Solution Approach 2:
The patent converts the previously harmful effect of excessive power supply voltage (causing heat dissipation and energy loss) into a beneficial tracking mechanism. The tracking power supply circuit uses the audio signal itself to control the power supply voltage, transforming the problem of fixed high voltage into a solution where voltage automatically adapts to signal requirements, minimizing waste.
3Use of energy by moving object
If separate tracking power supply circuits are used for in-phase and anti-phase amplifying circuits, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the power supply system into separate tracking power supply circuits for the in-phase and anti-phase power amplifying circuits. Each tracking circuit independently monitors its corresponding audio signal and adjusts power supply voltage accordingly. This segmentation enables optimized power efficiency for each channel while maintaining the ability to handle complex audio signals.
Solution Approach 2:
The tracking power supply circuit design serves multiple functions: it provides adaptive voltage regulation, reduces power consumption, minimizes heat dissipation, and maintains audio signal fidelity. By creating a universal tracking mechanism that can be applied to both in-phase and anti-phase circuits, the patent achieves improved power efficiency without proportionally increasing complexity.
Data Source
AI summary
The present disclosure provides an audio system. The audio system includes: a target audio signal generator module including a plurality of target audio signal generators, configured to receive an audio signal and a tracking signal and generate a plurality of target audio signals based on the audio signal and tracking signal; a tracking power supply circuit module including a plurality of tracking power supply circuits, configured to receive the plurality of target audio signals and generate a plurality of power supply voltages based on the plurality of target audio signals; an audio power amplifying circuit module including a plurality of audio amplifying circuits, configured to receive the plurality of target audio signals and the plurality of power supply voltages, and amplify the plurality of target audio signals; wherein each of the plurality of tracking power supply circuits provides a corresponding power supply voltage for each of the plurality of audio amplifying circuits.