Electromagnetic Pulse-Coupled Circuitry for Low-Power Signal Isolation
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Solution Overview
Problem
Existing insulated signal transmission methods consume high power due to the need to enhance pulse edges using band-pass filter type frequency characteristics, leading to increased power consumption in receivers.
Innovation Solution
The electronic circuitry outputs an analog waveform with N pulse waveforms, transfers it as a second waveform with at least N+1 pulse waveforms via electromagnetic coupling, and receives it to determine the input signal, using a receiving circuitry that includes a high-pass filter and low-pass filter to enhance frequency components and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If band-pass filter type frequency characteristics are used to enhance pulse edges in insulated signal transmission, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent divides the frequency filtering function into two separate stages: a high-pass filter section that enhances rising edges by removing DC components, and a low-pass filter section that smoothens pulses by removing high-frequency noise. This segmentation allows each filter to operate optimally in its specific frequency range, achieving good signal quality without requiring a complex band-pass filter that would consume more power.
Solution Approach 2:
The patent changes the filtering approach from using a single band-pass filter with fixed frequency characteristics to using two separate filters (high-pass and low-pass) with adjustable cutoff frequencies. The high-pass filter cutoff frequency is set to remove DC components while preserving signal edges, and the low-pass filter cutoff frequency is set to smooth noise while preserving pulse shapes. This parameter optimization reduces power consumption while maintaining signal quality.
2Measurement precision
If the receiver counts many pulses to determine the signal, then signal determination accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-processing the input signal through high-pass and low-pass filtering before pulse counting. The high-pass filter enhances rising edges to make pulse detection more reliable, and the low-pass filter smoothens noise to prevent false pulse detection. This preliminary signal conditioning ensures that the subsequent pulse counting operation can accurately determine the signal with fewer pulses, thereby reducing power consumption while maintaining high determination accuracy.
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 allows for signal determination based on a larger number of pulse waveforms while reducing power consumption and enhancing noise resistance.
Implementation Method 1
transfer circuitry to transfer the first waveform as a second waveform that includes at least N+1 pulse waveforms, via electromagnetic coupling
Data Source
AI summary
According to one embodiment, electronic circuitry includes: transmitting circuitry to output a first waveform including N pulse waveforms (N is a natural number larger than 1) in response to an input signal; transfer circuitry to transfer the first waveform as a second waveform that includes at least N+1 pulse waveforms, via electromagnetic coupling; and receiving circuitry configured to receive the second waveform and determine the input signal based on the at least N+1 pulse waveforms.