Memory Device Temperature Control Circuit
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Solution Overview
Problem
Nonvolatile memory devices, such as flash memory, face challenges in maintaining consistent read operation reliability due to temperature variations, which can affect data storage and retrieval speeds.
Innovation Solution
Incorporating a temperature detection circuit and control logic within the memory device to maintain a set temperature for memory blocks during read operations by adjusting bit line voltage or using a heating control signal, ensuring consistent temperature across memory blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature detection and heating control circuits are added to maintain constant temperature, then read operation reliability is improved, but device complexity increases
Solution Approach 1:
The memory device performs self-temperature management by incorporating a temperature detection circuit that monitors the memory block temperature and a control logic that adjusts bit line voltage or activates heating layers to maintain optimal temperature, enabling the device to self-regulate without external intervention
Solution Approach 2:
A feedback mechanism is established where the temperature detection circuit continuously monitors memory block temperature and provides feedback to the control logic, which then adjusts operating parameters (bit line voltage or heating control signals) to maintain temperature within optimal ranges, creating a closed-loop control system
2Temperature
If bit line voltage is adjusted to control temperature, then temperature stability is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts bit line voltage based on real-time temperature conditions detected by the temperature detection circuit, varying the voltage level according to actual thermal state rather than maintaining a fixed high voltage, thereby achieving temperature stability while minimizing energy consumption
Solution Approach 2:
The control logic changes operating parameters (bit line voltage level) in response to temperature detection signals, adjusting the voltage to appropriate levels that maintain temperature stability while optimizing energy efficiency by avoiding unnecessarily high voltage states
3Reliability
If heating control signals are applied to maintain set temperature, then data storage reliability is improved, but power consumption increases
Solution Approach 1:
Heating control is applied periodically or intermittently based on temperature detection feedback rather than continuously, activating heating layers only when temperature drops below the set point and deactivating them when the set temperature is achieved, thereby maintaining data storage reliability while reducing overall power consumption
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 the reliability of read operations by maintaining a constant temperature, thereby improving data storage and retrieval speeds in nonvolatile memory devices.
Implementation Method 1
a memory cell array including a plurality of memory blocks, each with a heating layer
Implementation Method 2
a temperature detection circuit configured to detect a temperature of the memory cell array
Data Source
AI summary
The memory device includes a memory cell array including a plurality of memory blocks each including a plurality of strings, wherein the plurality of memory blocks are controlled to have a set temperature; a peripheral circuit for performing a read operation on a selected memory block among the plurality of memory blocks; a temperature detection circuit for detecting a temperature of the memory cell array and generating a temperature detection signal based on the temperature of the memory cell array; and a control logic for controlling the peripheral circuit during the read operation and configured to generate a heating control signal that may control the selected memory block to have the set temperature in response to the temperature detection signal.