Adjustable Capacitor Switching Circuit for Precise Capacitance Control
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Solution Overview
Problem
The challenge in semiconductor manufacturing is the difficulty in precisely controlling the capacitance value of capacitor devices due to the miniaturization of semiconductor structures, leading to deviations from the original design values.
Innovation Solution
An adjustable capacitor device is designed with variable resistors, comparators, and transistors to control the connection or disconnection of capacitors based on voltage signals, allowing flexible adjustment of capacitance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor structures are miniaturized to improve integration density, then productivity and compactness are improved, but manufacturing precision of capacitance values deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of capacitance values through voltage-controlled variable resistors that can change their resistance values after fabrication. This allows the capacitance to be tuned post-manufacturing, transforming a static component into a dynamically adjustable one, thereby resolving the precision issue caused by miniaturization constraints.
Solution Approach 2:
The patent changes the resistance parameter of variable resistors through applied voltages to adjust the capacitance values. By modifying the resistance parameter dynamically, the system compensates for manufacturing variations and achieves precise capacitance control despite miniaturization challenges.
2Device complexity
If fixed capacitance values are used to simplify device structure, then device complexity is reduced, but adaptability to different performance requirements deteriorates
Solution Approach 1:
The patent makes the capacitor device universal by enabling it to provide multiple capacitance values through the variable resistor mechanism. A single device structure can adapt to different capacitance requirements, eliminating the need for multiple fixed-value capacitors and maintaining structural simplicity while enhancing versatility.
Solution Approach 2:
By introducing voltage-controlled variable resistors, the patent transforms the static capacitance into a dynamic parameter that can be adjusted based on different operational requirements, thereby achieving adaptability without significantly increasing structural complexity.
3Adaptability or versatility
If multiple capacitors are used to achieve different capacitance values, then adaptability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple capacitor functions into a single device by using variable resistors to adjust the effective capacitance value. Instead of fabricating multiple separate capacitors with different values, one capacitor with adjustable parameters achieves the same effect, reducing component count and simplifying the device structure.
Solution Approach 2:
By changing the resistance parameter of the variable resistor, the patent enables a single capacitor to provide multiple effective capacitance values, eliminating the need for multiple physical capacitors and thereby reducing device complexity while maintaining adaptability.
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 device enables precise and flexible adjustment of capacitance values, addressing deviations in manufactured devices and simplifying the manufacturing process, with the potential to improve the performance of MOM capacitors.
Implementation Method 1
a first comparator coupled between the first variable resistor and a first node
Implementation Method 2
a first transistor coupled between the first node, the first capacitor and the second capacitor, and a second transistor coupled between the first node, the first capacitor and the second capacitor
Implementation Method 3
a first capacitor, a second capacitor
Data Source
AI summary
An adjustable capacitor device and a method for adjusting a capacitance value are provided. The adjustable capacitor device includes a first variable resistor, a first comparator coupled between the first variable resistor and a first node, a first capacitor, a second capacitor, a first transistor coupled between the first node, the first capacitor and the second capacitor, and a second transistor coupled between the first node, the first capacitor and the second capacitor.