Power Noise Suppression Circuit With Reflective Heat Absorption
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Solution Overview
Problem
Existing noise suppression technologies, such as common-mode signal absorbers, are ineffective for power noise suppression in high-speed electronic systems due to energy loss and voltage ripple issues, and decoupling capacitors can cause electromagnetic interference (EMI) by generating multiple reflections.
Innovation Solution
A power noise suppression circuit comprising at least one power noise to heat converter with an impedance unit and an anti-power noise transmitted unit that absorbs and reflects power noise within specific frequency bands to convert it to thermal energy, maintaining system stability by bidirectional absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If decoupling capacitors are added to provide low-impedance paths for power noise suppression, then power noise absorption is improved, but multiple reflections are generated causing electromagnetic interference
Solution Approach 1:
The power noise suppression circuit is segmented into multiple functional units: impedance matching units (first and second) for different frequency bands, and absorption units (third and fourth) positioned at specific locations. This segmentation allows targeted suppression of power noise across different frequency ranges without generating excessive reflections, as each unit is optimized for its specific function and location.
Solution Approach 2:
Different impedance matching units are designed with different characteristic impedances (first impedance matching unit with higher impedance, second with lower impedance) to match different frequency bands. The absorption units are strategically positioned at specific locations along the power transmission line where reflections occur, providing localized suppression without affecting the entire system uniformly.
2Object-affected harmful factors
If narrow traces are used in common-mode signal absorber, then common-mode signal suppression is improved, but DC resistance increases causing power loss and voltage drops
Solution Approach 1:
The power noise suppression circuit is designed to serve multiple functions: it suppresses power noise across different frequency bands, maintains low DC resistance for efficient power transmission, and provides impedance matching. The circuit units are connected in parallel with the power transmission line, allowing them to suppress noise while presenting minimal resistance to DC current flow, thus achieving both noise suppression and low power loss.
Solution Approach 2:
The circuit parameters are optimized to change with frequency: the impedance matching units provide different characteristic impedances for different frequency bands (first unit for higher impedance, second unit for lower impedance), while maintaining low DC resistance. This parameter optimization allows the circuit to effectively suppress power noise across a broad frequency range without causing significant power loss or voltage drops.
3Object-affected harmful factors
If narrow traces with high inductance are used, then common-mode signal absorption is improved, but voltage ripples increase in power systems
Solution Approach 1:
The impedance matching units are designed with different characteristic impedances optimized for different frequency bands. The first impedance matching unit provides higher impedance matching for certain frequency ranges, while the second provides lower impedance matching for other ranges. This frequency-dependent parameter optimization allows effective power noise suppression while minimizing voltage ripples across the power transmission line.
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 circuit effectively suppresses power noise with an absorption rate greater than 50% in low-impedance environments, reducing energy loss and EMI, while maintaining system stability and preventing power noise transmission and reflection.
Implementation Method 1
the power noise to heat converter converts the power noise to a thermal energy by the impedance unit
Implementation Method 2
the anti-power noise transmitted unit reflects the power noise within the specific frequency band to the power noise to heat converter
Data Source
AI summary
The invention discloses a power noise suppression circuit applied to a power system. The power noise suppression circuit comprises at least one power noise to heat converter and at least one anti-power noise transmitted unit. When a power noise within a specific frequency band enters the power noise suppression circuit, the power noise to heat converter converts the power noise to a thermal energy, and the anti-power noise transmitted unit reflects the power noise within the specific frequency band to the power noise to heat converter. Accordingly, the power noise within the specific frequency band can be suppressed and absorbed in the power noise suppression circuit, so as to maintain the stability of the power system.