Spread Spectrum Clock Generator EMI Reduction
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Solution Overview
Problem
Existing electronic devices face challenges in reducing electromagnetic interference (EMI) while maintaining connected communication performance, as existing spread spectrum clock generation technologies may deteriorate communication performance when adjusting frequency settings.
Innovation Solution
An electronic device is provided with a spread spectrum clock generator (SSCG) that controls the output of a clock signal by adjusting the spread spectrum setting, thereby reducing EMI without degrading connected communication performance. This is achieved by dynamically changing the spread spectrum method and spread ratio based on communication state changes and channel frequency identifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spread spectrum clock generation technology is used to reduce EMI by varying operating frequency over time, then electromagnetic interference is reduced, but connected communication performance may deteriorate
Solution Approach 1:
The patent applies dynamics by making the spread spectrum clock generation parameters adjustable and adaptive. The controller dynamically modifies the spread spectrum settings based on detected communication states and channel frequencies, allowing the system to optimize between EMI reduction and communication performance in real-time operating conditions
Solution Approach 2:
The patent changes physical or operational parameters by adjusting the spread spectrum clock generation settings according to communication state changes and channel frequency identifications. This allows the system to modify frequency variation characteristics to reduce EMI while maintaining communication reliability
2Object-affected harmful factors
If frequency settings are adjusted to reduce EMI, then electromagnetic interference is reduced, but communication performance deteriorates
Solution Approach 1:
The patent implements feedback by using a detector to monitor communication states and channel frequencies, then feeding this information back to the controller. The controller adjusts spread spectrum settings based on this feedback, creating a closed-loop system that optimizes both EMI reduction and communication performance
Solution Approach 2:
The system dynamically adjusts frequency settings based on real-time communication conditions. The controller modifies spread spectrum parameters in response to detected channel frequency and communication state, allowing adaptive optimization between EMI reduction and communication productivity
Data Source
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AI summary
An electronic device according to one embodiment comprises: a first communication module for first wireless communication; a second communication module for second wireless communication; a spread spectrum clock generator for generating a spread spectrum clock signal for data communication of the electronic device; and a processor which: when a communication state change event of the electronic device occurs, sets the spread spectrum method and spread ratio to a first spread spectrum method and a first spread ratio, respectively, in the spread spectrum clock generator; confirms whether the electronic device is connected to the first wireless communication and the second wireless communication; when the electronic device is connected to one or more of the first wireless communication or the second wireless communication, confirms the frequency band of the channel of the connected wireless communication; confirms whether at least one of a first frequency in a first operating frequency range or multiple frequencies of the first frequency is in the frequency band of the channel; and, when the first frequency and the multiple frequencies of the first frequency are not in the frequency band, maintains the first spread spectrum method and the first spread ratio such that the spread spectrum clock generator generates a spread spectrum clock signal on the basis of the first spread spectrum method and the first spread ratio, wherein the first operating frequency range is determined on the basis of a center frequency of data communication, the first spread spectrum method, and the first spread ratio. Various other embodiments may be possible.