Capacitor Devices with Frequency-Selective Filter Structures
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Solution Overview
Problem
Conventional embedded capacitor devices fail to effectively respond to switching noise due to their impedance characteristics, which deteriorate at higher frequencies, requiring multiple de-coupling capacitors and limited substrate space in high-frequency and high-speed electronic systems.
Innovation Solution
A capacitor device with multiple capacitors and filters, where each capacitor is coupled with a specific filter operating on different frequency bands, allowing switching noise to be quickly conducted to the appropriate capacitor for processing, thereby expanding the bandwidth and improving noise immunity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional embedded capacitor devices are used, then the structure is simple and easy to manufacture, but the impedance deteriorates at higher frequencies and the device cannot effectively respond to switching noise
Solution Approach 1:
The capacitor device is divided into multiple capacitor units (first capacitor, second capacitor, third capacitor) with different capacitance values and resonance frequencies. Each capacitor is paired with a corresponding filter (first filter, second filter, third filter) that operates at different frequency bands. This segmentation allows the system to handle different frequency ranges of switching noise effectively, with each segment optimized for its specific frequency range.
Solution Approach 2:
The capacitor device serves multiple functions simultaneously: it acts as a decoupling capacitor for power integrity, provides filtering for switching noise across multiple frequency bands, and maintains low impedance across a broad frequency spectrum. The integrated structure combines capacitor and filter functions into a single device that can handle both high-frequency and low-frequency noise.
2Reliability
If multiple de-coupling capacitors are used to handle high-frequency noise, then the noise immunity improves, but the substrate space required increases
Solution Approach 1:
Multiple capacitors and filters are merged into a single integrated capacitor device structure. The first capacitor, second capacitor, and third capacitor are electrically connected in parallel, along with their respective filters, forming one unified device that provides the noise immunity of multiple separate capacitors while occupying less substrate space.
Solution Approach 2:
The filters are integrated within the capacitor device structure, with each filter coupled to its corresponding capacitor. The filters are positioned and connected in a nested manner within the overall device footprint, allowing multiple functional elements to coexist in a compact arrangement that minimizes substrate space usage.
3Adaptability or versatility
If the capacitor operates at a single resonance frequency, then the design is simple, but it cannot effectively process switching noise across a broad frequency spectrum
Solution Approach 1:
Each filter is designed with specific local quality characteristics tailored to its corresponding capacitor's resonance frequency. The first filter is optimized for the first capacitor's resonance frequency, the second filter for the second capacitor's resonance frequency, and the third filter for the third capacitor's resonance frequency. This localized optimization ensures each filter effectively handles switching noise in its specific frequency band.
Solution Approach 2:
The capacitor device dynamically responds to switching noise across different frequency bands by activating the appropriate capacitor-filter pairs based on the noise frequency. The system adapts its impedance characteristics across a broad frequency spectrum, providing low impedance at multiple resonance frequencies rather than being fixed at a single frequency.
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 solution enhances the capacitor device's ability to handle a wide range of frequencies, providing low impedance and high noise immunity, suitable for high-frequency environments by effectively processing switching noise across a broad frequency spectrum.
Implementation Method 1
a first filter coupling the first capacitor and a conductive region, wherein the first capacitor has a first resonance frequency and the first filter is configured to operate at a first frequency band covering the first resonance frequency
Implementation Method 2
the first capacitor has a first resonance frequency... the first filter is configured to operate at a first frequency band covering the first resonance frequency
Data Source
AI summary
A capacitor device is provided. The capacitor device includes at least one capacitor. The capacitor device also includes a first capacitor and a first filter coupling the first capacitor and a conductive region, wherein the first capacitor has a first resonance frequency and the first filter is configured to operate at a first frequency band covering the first resonance frequency.