Dynamic Noise-Reducing Circuit for Electronic Devices
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Solution Overview
Problem
As mobile communication technologies advance, traditional noise-reducing components like ferrite beads or capacitors fail to effectively block electromagnetic interference across multiple frequency bands, leading to reduced radiation efficiency and impaired communication in electronic devices.
Innovation Solution
An electronic device with a dynamic noise-reducing circuit that includes multiple filters and a processor to selectively connect filters based on the current frequency band, ensuring noise reduction across various frequency bands, thereby maintaining radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ferrite bead or capacitor is connected to the power terminal to block noise, then noise in a specific frequency band is reduced, but noise in other frequency bands is not blocked
Solution Approach 1:
The single noise-reducing component is segmented into multiple frequency-specific filters (first filter for first frequency band, second filter for second frequency band). Each filter is designed to target specific frequency ranges, allowing the system to block noise across multiple bands simultaneously by connecting the appropriate filter based on the active frequency band.
Solution Approach 2:
The noise-reducing circuit transitions from a static single-component design to a dynamic multi-filter system. The processor dynamically selects and connects the appropriate filter based on the currently active frequency band, making the noise reduction capability adaptive to different operating conditions and frequency requirements.
2Object-affected harmful factors
If multiple filters are added to cover all frequency bands, then noise reduction across all bands is achieved, but device complexity increases
Solution Approach 1:
The circuit uses dynamic switching controlled by the processor to connect only the necessary filter based on the active frequency band. This approach maintains multiple filters for comprehensive coverage but reduces actual circuit complexity at any given moment by activating only one filter at a time, rather than having all filters permanently connected.
Solution Approach 2:
The noise-reducing circuit is designed with multi-functionality to handle different frequency bands. The same circuit architecture and switching mechanism serve multiple purposes by selectively activating different filters for different bands, reducing the need for separate dedicated noise reduction circuits for each frequency band.
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 improves radiation efficiency across all relevant frequency bands, maintaining bit error ratio and carrier-to-noise density similar to the device's off-state even when the display is on, ensuring reliable communication.
Implementation Method 1
a first filter 132-1 and a second filter 132-2. The plurality of filters may include a first filter 132-1 and a second filter 132-2
Data Source
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AI summary
An electronic device includes an antenna, a display, a housing forming at least a portion of an exterior of the electronic device, a printed circuit board disposed within the housing, a connector disposed on the printed circuit board, a wire electrically connecting the connector and the display, a plurality of filters disposed on the printed circuit board, a switch selectively connecting the connector to one or more of the plurality of filters, and at least one processor electrically connected with the antenna, the display, and the switch.