Multilayer Capacitor Array for Differential and Common-Mode Noise Elimination
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Solution Overview
Problem
Conventional multilayer capacitor arrays lack a simple mounting structure to effectively eliminate both differential-mode and common-mode noise in power lines using a single element.
Innovation Solution
A multilayer capacitor array mounting structure with specific terminal electrode connections and capacitor section configurations allows the same capacitor sections to function for both differential-mode and common-mode noise elimination, featuring symmetrical capacitances and parallel connections to reduce equivalent series inductance and provide wide-band noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional multilayer capacitor arrays are used with separate techniques for differential-mode and common-mode noise elimination, then noise elimination effectiveness is maintained, but device complexity and mounting difficulty increase
Solution Approach 1:
The multilayer capacitor array is designed with four terminal electrodes (first, second, third, and fourth terminal electrodes) connected to four inner electrodes respectively. The first and second terminal electrodes are connected to a first lead, while the third and fourth terminal electrodes are connected to a second lead. This configuration enables the single capacitor array to simultaneously eliminate both differential-mode noise (through the first capacitor section formed by first and second inner electrodes) and common-mode noise (through the second capacitor section formed by third and fourth inner electrodes), making the device universal for both noise elimination functions without requiring separate components or complex mounting structures
2Device complexity
If multiple separate capacitor arrays are used for differential-mode and common-mode noise elimination, then noise elimination effectiveness is maintained, but the number of components and mounting complexity increase
Solution Approach 1:
The patent merges two separate capacitor functions into a single multilayer capacitor array. The capacitor element body contains four inner electrodes that form two distinct capacitor sections: the first capacitor section (formed by first and second inner electrodes) for differential-mode noise elimination and the second capacitor section (formed by third and fourth inner electrodes) for common-mode noise elimination. By integrating both capacitor sections into one physical component with four terminal electrodes, the invention reduces the number of components from two separate capacitor arrays to one, while maintaining effective noise elimination performance for both noise types
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 structure effectively eliminates both differential-mode and common-mode noise using a single multilayer capacitor array, reducing equivalent series inductance and achieving low impedance across a wide band for high-frequency noise elimination.
Implementation Method 1
a first capacitor section formed by the first and second inner electrodes and a second capacitor section formed by the third and fourth inner electrodes
Data Source
AI summary
A multilayer capacitor array 1 comprises a capacitor element body 2 having first, second, third, and fourth inner electrodes 13 to 16, and first to fourth terminal electrodes 3 to 6 disposed on the outer surface of the capacitor element body 2 and respectively connected to the inner electrodes 13 to 16. The first and second inner electrodes 13, 14 form a first capacitor section C1, while the third and fourth inner electrodes 15, 16 form a second capacitor section C2. The multilayer capacitor array 1 is mounted to a circuit board such that the first and third terminal electrodes 3, 5 are connected to first leads 22, 23, while the second and fourth terminal electrodes 4, 6 are connected to a second lead 24.