Dynamic Voltage Supply Circuit for Headphone Button Detection
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Solution Overview
Problem
The power consumption in electronic devices is increased due to the provision of a fixed voltage to headphones, which is not optimized when buttons are pressed, leading to unnecessary energy usage.
Innovation Solution
A detection circuit comprising a resistance detecting circuit and a voltage supplying circuit that detects resistance variance in the input circuit of a headphone, generating a detecting signal to selectively switch between a first and second voltage signal, determining if switches are activated, and adjusting the voltage supply accordingly to minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed voltage is provided to the microphone of the headphone, then the electronic device can maintain simple voltage supply control, but the power consumption increases unnecessarily when buttons are pressed
Solution Approach 1:
The patent implements dynamic voltage supply adjustment based on button press detection. The voltage supplying circuit switches between first voltage signal (during button press) and second voltage signal (normal operation) according to the detecting signal from the resistance detecting circuit, making the voltage supply adaptive rather than fixed.
Solution Approach 2:
The patent changes the voltage parameter dynamically by switching between different voltage signals (first voltage signal and second voltage signal) based on the resistance variance detection. This parameter change allows the system to optimize power consumption while maintaining operational simplicity.
2Device complexity
If a fixed voltage is provided to the microphone, then the voltage supply circuit remains simple, but energy is wasted when buttons are activated
Solution Approach 1:
The patent implements a feedback mechanism where the resistance detecting circuit continuously monitors the input circuit resistance and generates a detecting signal that feeds back to the voltage supplying circuit. This feedback loop enables automatic voltage adjustment without complex manual control, reducing energy waste while maintaining circuit simplicity.
Solution Approach 2:
The system performs self-adjustment of voltage supply based on automatic detection of button presses through resistance variance. The detection circuit and voltage supplying circuit work autonomously to optimize power consumption without requiring external intervention or complex control mechanisms.
3Use of energy by moving object
If the voltage supply is dynamically adjusted based on resistance detection, then power consumption is reduced, but the device complexity increases
Solution Approach 1:
The patent divides the voltage supply function into distinct segments: the resistance detecting circuit that monitors button presses and the voltage supplying circuit that adjusts voltage based on detection results. This segmentation allows each component to perform its function simply, reducing overall system complexity while achieving dynamic power optimization.
Data Source
AI summary
A detection circuit of an electronic device includes a resistance detecting circuit and a voltage supplying circuit, wherein the detecting circuit is coupled to an input circuit which is coupled to the electronic device and comprises a plurality of resistors respectively coupled to a plurality of switches, wherein the resistance detecting circuit is arranged to detect whether the input circuit has a resistance variation and generate a detecting signal indicative of the resistance variation; and the voltage supplying circuit is coupled to the resistance detecting circuit to supply a first voltage signal, wherein the voltage supplying circuit receives the detecting signal, and selectively switches the first voltage signal to a second voltage signal according to the detecting signal; wherein the resistance detecting circuit determines whether at least one of the plurality of switches is closed according to the second voltage signal.