Reservoir Capacitor for Reducing Domain Crossing Noise
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Solution Overview
Problem
Semiconductor devices face challenges in reducing domain crossing noise between heterogeneous power supplies due to cumbersome capacitor designs, leading to increased impedance and potential malfunctions.
Innovation Solution
A reservoir capacitor design featuring serially coupled capacitor groups with connection lines between them, allowing for cross-coupling capacitance between heterogeneous power voltages, thereby reducing domain crossing noise without the need for additional capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If cell capacitors are disposed between heterogeneous power supplies to reduce domain crossing noise, then domain crossing noise is reduced, but device area increases and design becomes cumbersome
Solution Approach 1:
The patent combines the functions of self-noise decoupling and domain-crossing noise reduction into a single reservoir capacitor structure. The first and second capacitor groups are connected between different power supply terminals, with coupling nodes interconnected to simultaneously address both noise types without requiring separate capacitors for each function.
Solution Approach 2:
The reservoir capacitor is designed to perform multiple functions: it provides self-noise decoupling between power supply and ground, and simultaneously reduces domain-crossing noise between heterogeneous power supplies. This multi-functional design eliminates the need for separate capacitors dedicated to each noise reduction purpose.
2Object-affected harmful factors
If cell capacitors are disposed between heterogeneous power supplies to reduce domain crossing noise, then domain crossing noise is reduced, but device area increases
Solution Approach 1:
The patent combines the functions of self-noise decoupling and domain-crossing noise reduction into a single reservoir capacitor structure. The first and second capacitor groups are connected between different power supply terminals, with coupling nodes interconnected to simultaneously address both noise types without requiring separate capacitors for each function.
3Object-affected harmful factors
If reservoir capacitor is used to reduce power noise, then power noise is reduced, but impedance remains high affecting high speed operation
Solution Approach 1:
The reservoir capacitor is divided into first and second capacitor groups with multiple capacitors in series within each group. This segmentation allows for optimized impedance characteristics across different frequency ranges, enabling effective noise reduction while maintaining high-speed operation capabilities.
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 design effectively reduces noise between heterogeneous power supplies, enhancing the reliability and performance of semiconductor devices by minimizing impedance and domain crossing noise.
Implementation Method 1
a first capacitor group having two or more capacitors, which are serially coupled to each other between a first power voltage supply terminal and a second power voltage supply terminal
Data Source
AI summary
A reservoir capacitor includes a first capacitor group having two or more capacitors, which are serially coupled to each other between a first power voltage supply terminal and a second power voltage supply terminal, a second capacitor group having two or more capacitors, which are serially coupled to each other between a third power voltage supply terminal and a fourth power voltage supply terminal and a connection line suitable for electrically coupling a first coupling node between the capacitors of the first capacitor group to a second coupling node between the capacitors of the second capacitor group.