Under-Drive Control Circuit for Temperature-Stable Voltage Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices face challenges in maintaining stable voltage generation across varying temperatures, particularly during read and verify operations, which can affect the performance and reliability of nonvolatile memory devices.
Innovation Solution
An under drive control circuit is introduced, comprising a voltage generation circuit and control logic that adjusts under drive time and offset based on temperature information and pre-stored temperature characteristics to stabilize voltage levels during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If voltage levels are adjusted for different operations (program, read, verify), then operation performance is improved, but voltage stability across temperature variations deteriorates
Solution Approach 1:
The patent implements dynamic voltage adjustment by introducing an underdrive control circuit that modifies voltage levels based on real-time temperature sensing. The circuit dynamically selects between different voltage generation paths (first voltage generation circuit for high temperature, second voltage generation circuit for low temperature) to maintain optimal voltage stability across varying operating conditions while supporting multiple operation types.
Solution Approach 2:
The patent changes the voltage generation parameters (voltage level, underdrive time, underdrive offset) based on temperature conditions. The control logic circuit receives temperature information and adjusts voltage generation parameters accordingly, selecting appropriate underdrive time and offset values from lookup tables to compensate for temperature-induced voltage drift and maintain reliable operation.
2Device complexity
If underdrive time and offset are fixed, then circuit complexity is reduced, but adaptability to temperature changes deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where a temperature sensing circuit continuously monitors the temperature of the flash memory device and provides temperature information to the control logic circuit. This feedback loop enables the system to automatically adjust voltage generation parameters (underdrive time, underdrive offset) based on actual temperature conditions, achieving temperature adaptability without significantly increasing circuit complexity.
Solution Approach 2:
The underdrive control circuit performs self-adjustment based on temperature feedback, automatically selecting appropriate voltage generation circuits and parameters without external intervention. The system serves itself by using its own temperature sensing capability to regulate its voltage generation, eliminating the need for complex external temperature compensation circuits.
3Reliability
If temperature compensation is implemented, then voltage stability is improved, but device complexity increases
Solution Approach 1:
The patent merges the temperature sensing function, control logic, and voltage generation control into a single integrated underdrive control circuit. The temperature sensing circuit, control logic circuit with lookup tables, and voltage generation circuits are combined to work together as one cohesive temperature compensation system, achieving voltage stability while minimizing the increase in overall device complexity through functional integration.
Data Source
AI summary
The present technology may include a voltage generation circuit configured to generate a plurality of voltages in response to at least one voltage control signal, and control logic configured to generate the at least one voltage control signal in order to adjust at least one of an under drive time and an under drive offset during an under drive operation of a semiconductor apparatus according to a temperature information signal and a pre-stored temperature characteristic signal of the semiconductor apparatus.