Resistive Storage Voltage Adjustment for Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing memory circuits face challenges in precisely adjusting reference resistance values for accurate data sensing, especially when the difference between high and low resistance states is small, leading to potential data errors.
Innovation Solution
The implementation of a memory circuit with a reference resistance block comprising at least two transistors coupled in series, where the resistance value is adjusted by individually controlling the gate voltages of these transistors, using a voltage generation unit and trimming unit to generate adjustment voltages based on temperature, allowing for precise resistance value adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single reference resistance element is used, then the device complexity is low, but the measurement precision of resistance comparison is insufficient when resistance state differences are small
Solution Approach 1:
The reference resistance block is divided into multiple reference resistance transistors (first reference resistance transistor and second reference resistance transistor) connected in series. Each transistor can be independently controlled through separate gate voltage inputs, allowing fine-grained adjustment of the total reference resistance value to match small resistance state differences in the storage cell.
Solution Approach 2:
The reference resistance value is made dynamically adjustable by applying different gate voltages to the reference resistance transistors. The reference resistance adjustment block modifies the gate voltages based on detected resistance states, enabling real-time optimization of the reference resistance to improve sensing accuracy for varying resistance conditions.
2Adaptability or versatility
If fixed reference resistance value is used, then the ease of operation is high, but the adaptability to different temperature conditions and resistance states is poor
Solution Approach 1:
The reference resistance adjustment block receives feedback about the resistance state of the storage cell and automatically adjusts the gate voltages of the reference resistance transistors accordingly. This closed-loop control enables the system to adapt to different temperature conditions and resistance states without manual intervention, maintaining high sensing accuracy across varying operating conditions.
Solution Approach 2:
The system changes the electrical parameters (gate voltages) of the reference resistance transistors to adapt the reference resistance value to different operating conditions. By modifying the gate voltages, the reference resistance can be tuned to compensate for temperature variations and match the resistance state differences of the storage cell.
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 approach enhances data sensing accuracy by allowing for fine-tuned resistance value adjustments, reducing data sensing errors even when resistance state differences are minimal.
Implementation Method 1
a reference resistance value as a reference for data sensing is adjusted precisely depending on a temperature
Data Source
AI summary
An electronic device including a semiconductor memory is provided to include one or more resistive storage cells; at least one reference resistance block including at least two reference resistance transistors which are coupled in series; a data sensing block suitable for comparing resistance values of a resistive storage cell selected among the one or more resistive storage cells and the reference resistance block, and sensing data of the selected resistive storage cell; and a reference resistance adjustment block suitable for adjusting the resistance value of the reference resistance block by adjusting gate voltages of the reference resistance transistors.