Multi-Tier Amplifier Power Supply With Noise-Damped Voltage Switching
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Solution Overview
Problem
Conventional audio amplifiers face inefficiencies due to fixed power supply voltages, leading to increased power consumption, heat dissipation, and reduced reliability, especially when operating at low volumes or with varying speaker impedances.
Innovation Solution
Implementing a multi-tier power supply system with a controller that dynamically switches between low and high voltage power supplies based on volume settings, using a damping circuit to prevent audible noise during transitions, and ensuring sufficient power wattage for worst-case conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed high voltage power supply is used to ensure sufficient power for worst-case conditions, then the amplifier can handle high volume settings and high-energy signals, but power consumption and heat dissipation increase significantly at low volume settings
Solution Approach 1:
The power supply voltage is made dynamic rather than fixed. The system automatically switches between high voltage and low voltage power supplies based on the detected volume level, allowing the amplifier to adapt its power consumption to actual operating conditions while maintaining reliability when needed
Solution Approach 2:
The power supply voltage parameter is changed based on operating conditions. The controller detects volume levels and switches the power supply voltage accordingly - using high voltage for high-volume/worst-case conditions and low voltage for low-volume conditions, optimizing the balance between performance and power consumption
2Power
If a single high voltage power supply is used to accommodate all volume settings, then the amplifier can deliver maximum power when needed, but the device complexity and heat dissipation design become more difficult
Solution Approach 1:
The power supply system is segmented into multiple independent power supplies with different voltage levels. Instead of using one oversized high-voltage supply for all conditions, the system divides power delivery into appropriate voltage segments matched to specific operating conditions, simplifying heat dissipation requirements for each segment
Solution Approach 2:
The multi-tier power supply system provides universal power delivery capability across all volume settings. The controller selectively activates appropriate power supplies based on volume requirements, allowing the system to universally handle both low-volume and high-volume conditions with optimized power delivery
3Use of energy by moving object
If voltage switching is implemented to optimize power consumption, then power efficiency improves, but audible noise may occur during transitions from low voltage to high voltage supply
Solution Approach 1:
The damping circuit is pre-configured and activated before voltage switching occurs. By preparing the damping circuit in advance, the system prevents audible noise during the transition from low voltage to high voltage power supply, ensuring smooth voltage changes without disrupting audio output
Data Source
AI summary
Techniques for providing multiple power supplies in electronic devices are disclosed. According to one aspect of the present invention, an appropriate power supply is provided only to accommodate a volume setting. In other words, there are at least two power supplies, one with a low voltage and the other with a high voltage. The high voltage power supply is only applied when there is a need to accommodate a volume setting. Thus the power consumption of the amplifiers is well controlled. As a result, the designs of the device and heat dissipation therein can be simplified and lowered in cost.