Audio Playback Circuit With Dynamic Power Limits by Volume
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Solution Overview
Problem
The challenge in audio devices is balancing performance and power consumption, as enhancing performance increases power consumption, and reducing power consumption compromises performance, necessitating a method to adjust power consumption based on audio signal intensity or user instruction.
Innovation Solution
A playback circuit and recording circuit with digital-to-analog and analog-to-digital converters, along with control circuits, that adjust power consumption limits based on audio signal amplitude or user settings through control signals to manage power usage dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power consumption is reduced to save energy, then power consumption decreases, but performance deteriorates
Solution Approach 1:
The patent implements dynamic power consumption adjustment by enabling the audio device to automatically switch between different power consumption modes (first mode with lower power consumption and second mode with higher power consumption) based on the volume value of the audio signal. This dynamic adaptation allows the system to optimize power usage while maintaining performance when needed.
Solution Approach 2:
The patent changes the power consumption parameter of the audio device based on the volume value of the audio signal. By adjusting the power consumption parameter dynamically according to signal characteristics, the system resolves the contradiction between maintaining performance and reducing power consumption.
2Reliability
If power consumption is increased to enhance performance, then performance improves, but power consumption increases
Solution Approach 1:
The system dynamically adjusts power consumption based on real-time audio signal characteristics. When high performance is needed (indicated by high volume values), the device switches to the second mode with higher power consumption. When performance requirements are lower, it switches to the first mode with reduced power consumption, thus avoiding unnecessary power consumption while maintaining performance when needed.
Solution Approach 2:
The patent adjusts the power consumption parameter according to the volume value of the audio signal, allowing the system to optimize the balance between performance and power consumption by changing operational parameters dynamically rather than maintaining a fixed high-power state.
3Use of energy by moving object
If power consumption is automatically adjusted according to audio signal intensity, then power consumption is optimized, but device complexity increases
Solution Approach 1:
The control circuit performs multiple functions: it detects the volume value of the audio signal, determines the appropriate power consumption mode based on this volume value, and controls the switching between different operational modes. By consolidating these functions into a single control circuit, the patent minimizes the increase in device complexity while achieving automatic power optimization.
Data Source
AI summary
A playback circuit including a digital-to-analog converter (DAC), an amplifying output circuit and a control circuit coupled to both is provided. The DAC is configured to convert an input playback audio signal into an input analog playback audio signal according to a first control signal for controlling an upper limit of power consumption of the DAC. The amplifying output circuit is coupled to the DAC and configured to generate an output playback audio signal according to the input analog playback audio signal and a second control signal for controlling an upper limit of power consumption of the amplifying output circuit. The control circuit is configured to generate the first control signal and second control signal according to a volume value of the input playback audio signal, thereby controlling the upper limit of power consumption of the DAC and the upper limit of power consumption of the amplifying output circuit.