Semiconductor Change Detection Circuit for PVT Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices malfunction due to changes in process, voltage, and temperature variations, affecting their operational reliability.
Innovation Solution
Incorporating a change detection circuit that generates a detection voltage based on transistor turn-on resistances, and a change determination circuit that enables specific determination signals to adjust the timing of input signals, allowing for adaptive delay adjustments in response to these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semiconductor devices operate under varying process, voltage, and temperature conditions, then device adaptability is improved, but operational reliability deteriorates due to malfunctions
Solution Approach 1:
The change detection circuit performs preliminary detection of transistor parameter changes before they cause malfunction. By continuously monitoring transistor characteristics and generating detection voltages that reflect parameter drift, the system proactively identifies variations in process, voltage, and temperature conditions, enabling preventive adjustment rather than reactive correction
Solution Approach 2:
The patent implements a feedback mechanism where the detection voltage from the change detection circuit is fed to the change determination circuit, which then adjusts the timing signal accordingly. This closed-loop feedback system continuously adapts the semiconductor device's timing characteristics based on real-time transistor parameter changes, maintaining operational reliability across varying PVT conditions
2Reliability
If transistor parameter changes are detected and adapted to, then operational reliability is improved, but device complexity increases due to additional circuits
Solution Approach 1:
The patent segments the reliability enhancement function into distinct modular circuits: a change detection circuit for monitoring transistor parameters, a change determination circuit for processing detection signals, and a timing adjustment circuit for applying corrections. This segmentation allows each module to perform its specific function efficiently while maintaining overall system reliability without requiring complete redesign of the semiconductor device
Solution Approach 2:
The detection voltage serves as an intermediary signal between the transistor parameter changes and the timing adjustment mechanism. Rather than directly modifying timing based on complex transistor parameter analysis, the patent uses the detection voltage as an intermediate representation that simplifies the coupling between the monitoring and adjustment circuits, reducing overall system complexity
Data Source
AI summary
A semiconductor device includes a change detection circuit and a change determination circuit. The change detection circuit generates a detection voltage having a voltage level varied in accordance with a change of a transistor. The change determination circuit enables a determination signals based on the voltage level of the detection voltage.