Power Noise Suppression Circuit With Dynamic Feedback Filtering
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Solution Overview
Problem
Existing power supply systems for noise-sensitive machine equipment, such as semiconductor manufacturing and precision machining equipment, struggle to provide stable power due to environmental noise interference, which cannot be effectively compensated for by assuming white Gaussian noise.
Innovation Solution
A power noise suppression circuit comprising a noise extraction module, a comparison module, an output coupling module, and a feedback module, which dynamically monitors and filters noise components from the supply voltage, generating a stable power voltage with low noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If environmental noise is directly compensated assuming white Gaussian noise, then the compensation process is simple, but the noise reduction effectiveness is poor because the assumption does not match actual environmental noise characteristics
Solution Approach 1:
The patent implements a feedback mechanism where the noise extraction module continuously monitors the power supply voltage, extracts noise components, and feeds this information back to the output coupling module. This closed-loop feedback system dynamically adjusts the power output based on actual noise conditions, resolving the contradiction by making the system adaptive to real environmental noise rather than relying on incorrect assumptions.
Solution Approach 2:
The noise extraction module acts as an intermediary between the power supply voltage and the output coupling module. It separates and extracts the noise component from the power supply voltage, allowing the system to process and compensate for actual noise characteristics rather than assuming white Gaussian noise, thereby improving noise reduction effectiveness.
2Reliability
If a complex noise filtering system is implemented to accurately handle non-white Gaussian noise, then noise reduction effectiveness improves, but the device complexity increases
Solution Approach 1:
The patent segments the power supply system into distinct functional modules: a noise extraction module that separates noise components, a comparison module that analyzes noise characteristics, and an output coupling module that applies compensation. This segmentation allows each module to perform its specific function efficiently, achieving reliable noise reduction without requiring an overly complex monolithic system.
Solution Approach 2:
The noise extraction module extracts the noise component from the power supply voltage using a high-pass filter, separating it from the useful power signal. This extraction approach allows the system to target and compensate for actual noise characteristics rather than processing the entire power signal, improving effectiveness while maintaining reasonable complexity.
3Manufacturing precision
If dynamic noise monitoring and compensation is implemented, then power supply stability for noise-sensitive equipment improves, but the circuit complexity increases
Solution Approach 1:
The patent uses feedback to continuously monitor the power supply voltage, extract noise components, and dynamically adjust the output to compensate for detected noise. This dynamic feedback mechanism ensures stable power delivery to noise-sensitive equipment while maintaining process control precision, resolving the contradiction between precision and complexity through intelligent control.
Solution Approach 2:
The output coupling module changes the output voltage parameter dynamically based on the comparison between the noisy power supply voltage and the filtered reference voltage. By adjusting the output voltage in response to detected noise, the system maintains manufacturing precision without requiring excessive circuit complexity.
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 power noise suppression circuit effectively reduces noise in the output power voltage, ensuring stability and precision for noise-sensitive machine equipment, thereby enhancing the accuracy and reliability of these systems.
Implementation Method 1
the noise extraction module comprises a high-pass filter and a voltage-dividing circuit. The high-pass filter is configured to obtain a noise component of the first voltage and divide the noise component
Implementation Method 2
The feedback module is a low-pass filter, an input end of the low-pass filter is configured to receive the second voltage, and the low-pass filter is configured to perform low-pass filtering on the second voltage
Implementation Method 3
the high-pass filter comprises a DC (direct current) isolation capacitor, a third voltage-dividing resistor and the second voltage-dividing resistor. One end of the DC isolation capacitor receives the first voltage
Data Source
AI summary
An embodiment of the present disclosure provides a power noise suppression circuit for machine equipment, which dynamically obtains a noise component in an input voltage provided by the power supply, generates a noise voltage accordingly, and compares the noise voltage with a feedback voltage to obtain a stable and low-noise power voltage, wherein the feedback voltage is generated by the power noise suppression circuit according to the power voltage. Therefore, the power noise suppression circuit of the embodiment of the present disclosure is particularly suitable for use in the machine equipment which is needed to be monitored and/or controlled precisely, such as a precision machining equipment or a semiconductor manufacturing equipment.