Clock Signal Generator Frequency Modulation for Noise Reduction
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Solution Overview
Problem
Data transmitting and receiving devices face challenges in reducing peak radiated electromagnetic noise, particularly in frequency ranges modified by clock frequency modifications, which can lead to increased interference.
Innovation Solution
A data transmitting and receiving device is designed with a clock signal generator that modulates a reference clock signal to produce a first clock signal with frequencies changing in a set cycle within a set frequency band, allowing data transmission and reception to occur on different frequency ranges to minimize noise peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data communication is carried out on a modified clock frequency, then communication speed is improved, but the peak of radiated electromagnetic noise increases in a particular frequency range
Solution Approach 1:
The frequency band is divided into multiple sub-bands, and data communication is performed on different sub-bands at different times. The transmission controller transmits data on a first frequency band during a first period, then switches to a second frequency band during a second period, effectively segmenting the communication process to avoid concentrated noise emission at any single frequency
Solution Approach 2:
The system implements periodic frequency switching between different frequency bands. The clock signal generator periodically changes the clock frequency between a first frequency and a second frequency, creating a periodic action that distributes electromagnetic noise emission over time and frequency, thereby reducing the peak noise level at any instantaneous frequency
2Adaptability or versatility
If a device contains both communication devices with and without clock frequency modification, then device functionality is improved, but electromagnetic interference increases in the frequency range of unmodified clock signals
Solution Approach 1:
Different frequency bands are assigned to different communication devices based on their operational characteristics. Communication devices that modify clock frequency are assigned to specific frequency bands, while devices that do not modify clock frequency are assigned to other frequency bands. This local differentiation ensures that each device operates in its optimal frequency range without causing interference to others
Solution Approach 2:
The transmission controller acts as an intermediary that manages frequency allocation between different communication devices. It determines which frequency band each device should use based on its characteristics, coordinating their operations to prevent electromagnetic interference while maintaining overall device functionality
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
This approach effectively reduces the peak of radiated electromagnetic noise in specific frequency ranges, enhancing communication efficiency and reducing interference.
Implementation Method 1
a first clock signal generator configured to modulate a reference clock signal including a reference frequency to produce a first clock signal including a frequency which changes in a set cycle within a set frequency band
Data Source
AI summary
A data transmitting and receiving device includes: a clock signal generator which modulates a reference clock signal having a reference frequency to produce a clock signal whose frequency changes in a set cycle within a set frequency band; and a frequency range storage which stores a first frequency range as a part of the set frequency band and/or a second frequency range as the rest part of the set frequency band. The first transmitter does not transmit first communication data to a first receiver based on the clock signal having the frequency belonging to the first frequency range and transmits the first communication data to the first receiver based on the clock signal having the frequency belonging to the second frequency range. The first receiver receives the first communication data from the first transmitter based on the clock signal having the frequency belonging to the second frequency range.