Universal Audio Driving Circuit for Multi-Mode Headphones
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Solution Overview
Problem
Traditional headphone driving apparatuses require different hardware configurations for various applications, leading to increased costs and development time due to the need for multiple dedicated ICs to support different audio applications.
Innovation Solution
An audio driving apparatus with a signal transmitting circuit and reference signal generators that can switch between cap, cap-less, and bridge-tied load (BTL) configurations using a mode selecting signal, allowing a single hardware setup to drive headphones with different configurations by selectively transmitting audio signals and turning off unused reference signal generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different hardware configurations are used for different audio applications, then the audio application requirements are met, but the cost and device complexity increase
Solution Approach 1:
The audio driving apparatus is designed with a universal hardware platform that can operate in multiple configurations (cap mode, cap-less mode, and BTL mode) through software control. The signal transmitting circuit can selectively connect to different output end pairs, and reference signal generators can be dynamically enabled or disabled based on the selected mode, allowing a single hardware device to replace multiple dedicated devices for different applications
2Adaptability or versatility
If multiple dedicated ICs are used to support different audio applications, then the application-specific performance is optimized, but the development cost and time increase
Solution Approach 1:
A single audio driving apparatus incorporates multiple operating modes (cap mode with first and second output end pairs, cap-less mode with first output end pair, and BTL mode with second output end pair) that can be selected through software configuration. The reference signal generators and signal transmitting circuit are designed to be dynamically configurable, allowing the same hardware to be adapted to different headphone configurations without requiring separate development cycles for each application
3Adaptability or versatility
If multiple dedicated ICs are used for different configurations, then the configuration-specific functionality is achieved, but the maintenance cost increases
Solution Approach 1:
The audio driving apparatus employs a unified hardware architecture with configurable signal transmitting circuits and reference signal generators that can be programmed to support different headphone configurations. This universal design reduces maintenance costs by eliminating the need to maintain multiple separate ICs, as all configuration support is achieved through software control of the same hardware components
Data Source
AI summary
The present invention provides a headphone apparatus and a headphone driving apparatus thereof The headphone driving apparatus includes a first and second driving circuits, a signal transmitting circuit, a first and second reference signal generators. The first driving circuit receives a first audio signal pair and generates a first driving signal. The second driving circuit receives a second audio signal pair and generates a second driving signal. The signal transmitting circuit transmits the first audio signal pairs or the reference signal to the first output end pair. The signal transmitting circuit decides to transmit the second audio signal pairs to the second output end pair or not according to the mode selecting signal. The second reference signal generator receives signals and generates the second reference signal. Wherein, the first and second reference signal generators are turned off according to the mode selecting signal.