Audio Amplifier Gating for Noise-Free DAC Playback
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Solution Overview
Problem
In audio technology, noise is generated due to factors like poor circuit design, impedance mismatch, and unstable power supply/audio data/clock signal, affecting the user's hearing experience, and existing solutions require users to replay or replug devices to mitigate noise.
Innovation Solution
An audio processor circuit with a storage circuit, digital-to-analog converter circuit, and amplifier circuit that converts digital audio data into an analog signal and automatically turns off the amplifier if the data volume is not a multiple of the throughput or exceeds an upper limit, preventing noise by stopping the output audio signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the amplifier circuit continues to operate without data validation, then the audio playing function remains continuous, but noise is generated when data loss or overflow occurs
Solution Approach 1:
The patent performs preliminary validation of audio data completeness before the amplifier processes the data. The controller checks whether the total data volume in the storage circuit is a multiple of the throughput before enabling the amplifier, and checks whether the data volume exceeds an upper limit threshold. This preliminary action prevents noise generation by ensuring data integrity before amplification occurs.
Solution Approach 2:
The patent implements a feedback mechanism where the controller continuously monitors the data volume in the storage circuit and adjusts the amplifier's operation accordingly. When the data volume is not a multiple of throughput or exceeds the upper limit, the controller disables the amplifier to prevent noise. This closed-loop feedback ensures that the amplifier only operates when valid audio data is available.
2Object-affected harmful factors
If the amplifier circuit is turned off to prevent noise, then hearing experience is improved, but audio playback is interrupted
Solution Approach 1:
The patent performs preliminary validation of audio data completeness before the amplifier processes the data. The controller checks whether the total data volume in the storage circuit is a multiple of the throughput before enabling the amplifier, and checks whether the data volume exceeds an upper limit threshold. This preliminary action prevents noise generation by ensuring data integrity before amplification occurs.
Solution Approach 2:
The patent implements a feedback mechanism where the controller continuously monitors the data volume in the storage circuit and adjusts the amplifier's operation accordingly. When the data volume is not a multiple of throughput or exceeds the upper limit, the controller disables the amplifier to prevent noise. This closed-loop feedback ensures that the amplifier only operates when valid audio data is available.
3Object-affected harmful factors
If data validation checks are performed before amplification, then noise is prevented, but processing time is increased
Solution Approach 1:
The patent performs preliminary validation of audio data completeness before the amplifier processes the data. The controller checks whether the total data volume in the storage circuit is a multiple of the throughput before enabling the amplifier, and checks whether the data volume exceeds an upper limit threshold. This preliminary action prevents noise generation by ensuring data integrity before amplification occurs.
Solution Approach 2:
The patent implements a feedback mechanism where the controller continuously monitors the data volume in the storage circuit and adjusts the amplifier's operation accordingly. When the data volume is not a multiple of throughput or exceeds the upper limit, the controller disables the amplifier to prevent noise. This closed-loop feedback ensures that the amplifier only operates when valid audio data is available.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution automatically prevents noise by stopping the output audio signal when abnormal conditions occur, improving the user's hearing experience without the need for user intervention.
Implementation Method 1
The digital-to-analog converter circuit is configured to convert the digital audio data from the storage circuit into an analog audio signal
Data Source
AI summary
An audio processor circuit includes a storage circuit, a digital-to-analog converter circuit, and an amplifier circuit. The storage circuit is configured to store digital audio data from an electrical device. The digital-to-analog converter circuit is configured to convert the digital audio data from the storage circuit into an analog audio signal. The amplifier circuit is configured to provide an output audio signal to an audio playing circuit according to the analog audio signal. If a total data volume of the digital audio data stored in the storage circuit is not a multiple of a throughput or the total data volume of the digital audio data stored in the storage circuit is equal to or greater than an upper limit value, the amplifier circuit is turned off such that the amplifier circuit stops providing the output audio signal to the audio playing circuit.