Memory Cell Current Path Temperature Regulation
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Solution Overview
Problem
Existing memory cells do not efficiently manage current flow and conductivity changes over a specific temperature range, leading to suboptimal performance in storing and retrieving data, particularly in non-volatile memory systems where conductivity needs to be significantly increased and decreased within a narrow temperature range.
Innovation Solution
An electronic device with two conductive electrodes and a second current path made of materials like Mott insulators and transition metal oxides, which exhibits a minimum 100-times increase in conductivity for increasing temperature within 50°C and a 100-times decrease for decreasing temperature, allowing for efficient current flow and temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a charge pump circuit is used to supply reference potential, then reference potential can be supplied, but circuit scale increases and parasitic capacitance increases causing frequency deviation
Solution Approach 1:
The patent extracts the charge pump circuit from the reference potential supply system and replaces it with a simplified capacitor-based voltage holding circuit. This removes the complex switching components and transistor networks while retaining the essential function of providing a stable reference potential to the sigma-delta modulator.
Solution Approach 2:
The patent applies local quality by using a dedicated capacitor connected to the reference potential node to provide localized charge storage and voltage stabilization. This localized approach eliminates the need for a full charge pump circuit while maintaining reference potential stability in the specific location where it is needed.
2Area of stationary object
If circuit components are miniaturized, then integration density increases, but manufacturing precision requirements increase causing performance degradation
Solution Approach 1:
The patent changes the fundamental parameters of the reference potential supply from active transistor-based switching (charge pump) to passive capacitor-based storage. This parameter change allows for larger component dimensions with relaxed manufacturing tolerances, as capacitors are more tolerant to process variations than transistor switches, thereby reducing the impact of manufacturing precision requirements.
3Speed
If sampling frequency is increased, then conversion speed improves, but power consumption increases
Solution Approach 1:
The patent implements periodic action through the clocked switching mechanism that controls the capacitors in the reference potential supply circuit. By using periodic clock signals to charge and discharge the capacitors at optimized intervals, the circuit maintains reference potential stability while minimizing unnecessary switching activity, thereby reducing power consumption even at higher sampling frequencies.
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 enables continuous or pulsed current flow with enhanced conductivity management, acting as a temperature-limiting and current density-limiting device, effectively addressing the conductivity challenges in memory cells across varying temperatures.
Implementation Method 1
A first current path from one of the electrodes to the other that has a dominant thermally activated conduction activation energy of 0.5 eV to 3.0 eV
Implementation Method 2
A second current path from the one electrode to the other that is circuit-parallel the first current path. The second current path exhibits a minimum 100-times increase in electrical conductivity for increasing temperature within a temperature range of no more than 50°C between 300°C and 800°C
Implementation Method 3
The second current path exhibits a minimum 100-times decrease in electrical conductivity for decreasing temperature within the 50°C temperature range
Implementation Method 4
flowing current through the other current path between the two electrodes sufficient to heat the one current path within the 50°C temperature range to increase conductivity in the one path
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
An electronic device includes two conductive electrodes. A first current path extends from one of the electrodes to the other and has a dominant thermally activated conduction activation energy of 0.5 eV to 3.0 eV. A second current path extends from the one electrode to the other and is circuit-parallel the first current path. The second current path exhibits a minimum 100-times increase in electrical conductivity for increasing temperature within a temperature range of no more than 50°C between 300°C and 800°C and exhibits a minimum 100-times decrease in electrical conductivity for decreasing temperature within the 50°C temperature range. Other embodiments are disclosed.