Capacitive Logic Cell Five-Electrode Variable Capacitance
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Solution Overview
Problem
Conventional capacitive logic cells based on four-electrode variable-capacitance capacitors face inefficiencies due to mechanical coding of logic states, which leads to electromechanical transduction losses at each logic state change, and require multiple components and transductions for logic operations.
Innovation Solution
A capacitive logic cell utilizing a single variable-capacitance capacitor with five electrodes, where the movable assembly's position relative to the fixed assembly varies capacitance in response to logic input signals, reducing the number of components and transductions needed for logic operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional four-electrode variable-capacitance capacitors are used for logic operations, then logic functions can be implemented, but electromechanical transduction losses occur at each logic state change
Solution Approach 1:
The patent merges multiple capacitors into a single five-electrode variable-capacitance capacitor structure. The fixed assembly contains first and second electrodes with first and second control electrodes, while the movable assembly contains a third electrode that can simultaneously interact with all fixed electrodes. This consolidation reduces the number of separate components and eliminates redundant electromechanical transductions required in conventional four-electrode capacitor-based logic cells.
Solution Approach 2:
The single five-electrode capacitor structure serves multiple functions that would traditionally require separate components. The movable third electrode can be positioned to vary capacitance between itself and different fixed electrodes (first, second, third, and fourth electrodes) depending on the logic operation required. This multi-functional design allows the same physical structure to perform various logic functions without requiring additional transduction mechanisms.
2Adaptability or versatility
If multiple capacitors are used to perform logic operations, then various logic functions can be implemented, but the number of components and transductions increases
Solution Approach 1:
The patent combines multiple capacitor functions into a single five-electrode variable-capacitance capacitor. The structure includes a fixed assembly with multiple electrodes (first electrode, second electrode, first control electrode, second control electrode) and a movable assembly with a third electrode. This single integrated structure replaces what would traditionally require multiple separate capacitors, reducing component count while maintaining the ability to implement various logic functions through different electrode configurations and capacitance variations.
Solution Approach 2:
The five-electrode capacitor structure is designed to be universally applicable to multiple logic functions. By controlling the position of the movable third electrode relative to different fixed electrodes, the device can perform various logic operations. The same physical structure adapts to different logical requirements through electrical control rather than requiring separate dedicated components for each logic function.
3Use of energy by moving object
If conventional capacitive logic cells are used, then logic operations can be performed, but energy efficiency is reduced due to repeated electromechanical transductions
Solution Approach 1:
The patent consolidates multiple capacitive elements into a single five-electrode variable-capacitance capacitor with a shared movable assembly. This merging eliminates redundant electromechanical transduction events that would occur in conventional designs using multiple separate capacitors. The single movable third electrode can be actuated once to simultaneously affect multiple capacitance relationships, reducing the total energy consumption associated with mechanical movement and transduction.
Solution Approach 2:
The movable third electrode serves multiple capacitance relationships simultaneously through its position relative to different fixed electrodes. When the third electrode moves, it automatically varies the capacitance between itself and each of the fixed electrodes (first, second, third, and fourth electrodes) without requiring separate actuation mechanisms for each capacitance relationship. This self-service capability reduces the energy required for actuation and minimizes transduction losses.
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 minimizes electromechanical transductions and losses, enabling efficient logic operations with reduced component count and improved energy efficiency by leveraging a single capacitor to perform various logic functions.
Implementation Method 1
the capacitor is a device with five electrodes d, s, g1, g2 and r electrically insulated from each other. The d and s electrodes, called main electrodes, are movable relative to each other. The electrodes g1, g2 and r, called control electrodes, are intended to receive a control signal, for example voltages or currents, suitable for varying the relative position of the electrodes d and s so as to vary the value of the capacitance Cds between electrodes d and s.
Data Source
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AI summary
The invention relates to a logic cell comprising a fixed assembly including a first electrode (s), a moving assembly including a second electrode (d), and third (g1), fourth (g2) and fifth (r) electrodes, in which: the first, second, third, fourth and fifth electrodes are isolated from each other; the first and second electrodes define a variable capacitance depending on the position of the moving assembly relative to the fixed assembly; the third electrode is connected to a node (in1) for applying a first input logic signal (A); the fourth electrode is connected to a node (in2) for applying a second input logic signal (B); the fifth electrode is connected to a reference node (GND); and the position of the second electrode relative to the first electrode is a function of a combination of the first (A) and second (B) input logic signals.