USB Wire-Control Earphone Circuit for Independent Volume Adjustment
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Solution Overview
Problem
Existing wire control earphones require electronic devices to process volume adjustments, increasing the processor load and affecting response speed and data processing efficiency.
Innovation Solution
A wire control earphone with a volume adjuster that outputs analog voltage adjustment signals directly to the ear receivers, reducing the processor load by handling volume adjustments independently through a USB plug with a power-supply pin, grounding pin, and signal pins, using a digital-to-analog conversion unit to convert digital signals into analog signals for the ear receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If volume adjustment is processed by the electronic device processor, then volume control function is achieved, but processor load increases and response speed decreases
Solution Approach 1:
The volume control function is segmented from the electronic device processor and transferred to the earphone's independent control circuit. The control circuit includes a control unit that processes volume adjustment requests independently, separating the volume control task from the main processor to reduce its load and improve overall system productivity.
Solution Approach 2:
The earphone system performs self-service by handling volume adjustment requests through its own control circuit rather than relying on the electronic device processor. The control circuit includes a control unit that can independently process volume commands, generating control signals to adjust the output volume without requiring processor intervention.
2Ease of operation
If volume adjustment is processed by the electronic device processor, then volume control is achieved, but response speed of other functions is affected
Solution Approach 1:
The volume control function is segmented into a separate control circuit within the earphone, allowing it to operate independently from the electronic device's main processor. This segmentation ensures that volume adjustment operations do not interfere with the response speed of other electronic device functions.
Solution Approach 2:
The earphone's control circuit provides self-service for volume adjustment by processing volume requests locally. The control unit generates control signals to adjust the output volume directly, eliminating the need for continuous processor involvement and thereby maintaining fast response speeds for other electronic device functions.
3Adaptability or versatility
If conventional 3.5mm interface is used, then compatibility is maintained, but independent volume processing capability is lost
Solution Approach 1:
The earphone system is designed with multi-functionality by incorporating both a control circuit for independent volume processing and support for conventional interfaces. The control circuit includes a control unit that can process volume requests independently while the earphone can still connect through standard interfaces, achieving both independence and compatibility.
Solution Approach 2:
The control circuit acts as an intermediary between the audio signal source and the output transducers. It receives audio signals, processes volume adjustments independently through the control unit, and then outputs the adjusted signals to the ear receivers, enabling independent volume processing without sacrificing interface compatibility.
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 allows for independent volume adjustment at the earphone end, reducing processor load on electronic devices and improving response speed and efficiency during audio playback.
Implementation Method 1
a digital-to-analog conversion unit configured to covert the digital voltage adjustment value into an analog voltage adjustment value and apply the analog voltage adjustment value to the left and right ear receiver wires
Data Source
AI summary
Disclosed is a wire control earphone, comprising a USB plug, an earphone wire, left and right ear receivers and a volume adjuster. The USB plug has a power-supply pin, a grounding pin and two signal pins. The earphone wire has a power-supply wire, two receiver wires and a ground wire which are correspondingly connected with the pins of the USB plug. The right ear receiver is connected between the right ear receiver wire and the ground wire. The volume adjuster is powered via the power-supply wire and comprises an adjustment triggering unit for outputting a volume adjustment signal, a processing unit for determining a voltage adjustment value according to the volume adjustment signal and outputting a digital voltage adjustment value, and a digital-to-analog conversion unit for converting the digital voltage adjustment value into an analog voltage adjustment value and applying the analog voltage adjustment value to the two receiver wires.