Variable-Clock Data Transmission for Lower Electromagnetic Interference
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Solution Overview
Problem
Existing digital data transmission methods over lines face significant electromagnetic interference issues, particularly at higher frequencies, which increase the effort required to suppress interference and can be problematic in environments with multiple electromagnetic sources.
Innovation Solution
A method and system that utilize a variable frequency clock signal for transmitting digital data, broadening the frequency band and reducing interference energy per frequency, achieved through a radar sensor with a transmitter, receiving antennas, and an analog-to-digital converter, allowing for efficient and cost-effective interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital data is transmitted at higher speeds, then productivity is improved, but electromagnetic interference increases
Solution Approach 1:
The patent applies dynamics by making the clock signal frequency variable over time instead of fixed. The frequency is modulated according to the data being transmitted, which dynamically changes the spectral distribution of electromagnetic emissions. This resolves the contradiction by maintaining high transmission speeds while distributing interference energy across a broader frequency range, reducing peak interference at any single frequency.
Solution Approach 2:
The patent changes the frequency parameter of the clock signal dynamically. By modulating the clock frequency based on the data pattern, the system transforms the fixed-frequency interference problem into a variable-frequency transmission system. This parameter change spreads the electromagnetic energy spectrum, reducing the concentration of interference at specific frequencies while maintaining high data transmission rates.
2Reliability
If shielding and ground planes are used to suppress interference, then resistance to electromagnetic interference is improved, but device complexity and cost increase
Solution Approach 1:
The patent converts the harmful concentrated electromagnetic interference into a beneficial spread-spectrum signal. By deliberately modulating the clock frequency, the system transforms what would be narrowband interference into broadband transmission, which is inherently more resistant to interference and requires less complex shielding. The harm of electromagnetic radiation is converted into a benefit of improved noise immunity through frequency diversity.
3Ease of operation
If serial transmission is used to reduce connection effort, then ease of operation is improved, but electromagnetic interference increases due to higher frequencies
Solution Approach 1:
The patent makes the serial transmission dynamic by varying the clock frequency over time. This dynamic frequency modulation allows serial transmission to maintain ease of operation with single-wire connections while reducing the electromagnetic interference problem. The frequency variation spreads the energy spectrum, preventing the concentration of interference that would otherwise occur at fixed high frequencies required for fast serial communication.
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 simplifies the transmission process, reduces interference emission and susceptibility, and is suitable for environments with high electromagnetic interference, using a single physical channel and minimizing production costs.
Implementation Method 1
amplifying the clock signal and emitting the amplified signal via a transmitting antenna
Implementation Method 2
receiving a reflection of the emitted signal using a receiving antenna
Data Source
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AI summary
The invention relates to a method for transmitting digital data via a line, comprising steps of providing a clock signal and transmitting the digital data synchronously to the clock signal, wherein the clock signal comprises a frequency that can change over time.