Audio Power Supply Circuit Voltage Drop Detection
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Solution Overview
Problem
Conventional audio systems fail to detect sudden drops in AC voltage promptly, leading to unpleasant noise in the audio signal due to unstable power supply.
Innovation Solution
A power supply circuit that includes a converting circuit to convert AC voltage to DC voltage, a detection circuit to identify sustained AC voltage drops below a threshold, and a notification circuit to inform the audio processing device of the drop, allowing it to adjust the signal level and prevent noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional power supply circuit is used without voltage drop detection, then the device complexity is low, but noise is generated in the audio signal when AC voltage drops sharply
Solution Approach 1:
The detection circuit continuously monitors AC voltage levels in advance before a drop occurs, and the notification circuit prepares to alert the audio processing device immediately when a threshold is crossed. This preliminary detection and notification mechanism allows the audio processing device to proactively reduce signal levels before noise can be generated, resolving the contradiction by adding minimal complexity to prevent harmful noise effects.
2Speed
If the audio processing device continuously monitors AC voltage levels, then the detection speed of voltage drops improves, but the device complexity increases
Solution Approach 1:
The notification circuit acts as an intermediary between the detection circuit and the audio processing device. Instead of requiring the audio processing device to continuously monitor voltage levels itself, the notification circuit receives detection signals and transmits only when necessary (when voltage drops occur). This intermediary approach enables fast detection response while keeping the audio processing device simple, resolving the contradiction between detection speed and device complexity.
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
The solution effectively suppresses noise by allowing the audio processing device to reduce the signal level when a voltage drop is detected, ensuring a smoother audio output even during power instability.
Implementation Method 1
a converting circuit configured to convert an alternating current (AC) voltage into the DC voltage
Data Source
AI summary
A power supply circuit supplies a direct current voltage to an audio processing device. The power supply circuit includes: a converting circuit configured to convert an alternating current voltage into a DC voltage; a detection circuit configured to detect a state in which the AC voltage lower than a threshold continues for a given period of time; and a notification circuit configured to, when the detection circuit detects the state representative of an AC voltage drop, notify the audio processing device of the AC voltage drop.