Audio Circuit Pin Routing for Type-C Earpiece Recording Distortion
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Solution Overview
Problem
Type-C analog earpieces experience deteriorated recording quality due to switches in Type-C ports, which increase recording distortion during insertion.
Innovation Solution
An audio circuit design with two distinct microphone input modules in the terminal, allowing different pin configurations for proper audio signal and ground connections without the need for switches, ensuring optimal recording quality by adapting to different plugging states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switches are provided in the Type-C port to implement switching between output pin and ground pin, then the earpiece can be connected properly or reversely, but recording distortion increases and recording quality deteriorates
Solution Approach 1:
The patent divides the microphone input function into two separate input modules (first microphone input module and second microphone input module), each connected to different pins of the Type-C port. This segmentation allows the system to select the appropriate input module based on plugging state without using switches, thereby avoiding recording distortion while maintaining connection adaptability.
Solution Approach 2:
The patent implements dynamic selection of microphone input modules based on the detected plugging state. The system automatically switches between the first and second microphone input modules depending on whether the earpiece is inserted normally or reversely, achieving adaptive connection without mechanical switches that cause distortion.
2Adaptability or versatility
If switches are used for pin switching, then the device can handle both normal and reverse insertion, but the device complexity increases due to additional switching components
Solution Approach 1:
Instead of using a single microphone input with switches, the patent segments the input path into two separate microphone input modules, each permanently connected to different pins. This eliminates the need for switching components while maintaining the ability to handle both normal and reverse plugging states.
Solution Approach 2:
The Type-C port's inherent reversibility feature is leveraged to provide universal compatibility. By combining the reversible Type-C connector with two microphone input modules, the system achieves multi-functionality where the same port can handle both normal and reverse insertion without additional switching mechanisms.
Data Source
AI summary
An audio circuit includes: a first Type-C port, a first microphone input module, and a second microphone input module; the first Type-C port includes a first pin and a second pin, the first microphone input module is connected to the first pin, and the second microphone input module is connected to the second pin; in a case that the first Type-C port and a second Type-C port of the earpiece are in a first plugging state, the first pin is connected to a third pin of the second Type-C port, and the second pin is connected to a fourth pin of the second Type-C port; and in a case that the first Type-C port and the second Type-C port are in a second plugging state, the second pin is connected to the third pin, and the first pin is connected to the fourth pin.