Dynamic Over-Voltage Protection for Interface Circuitry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated circuits face challenges in handling over-voltage conditions due to reduced transistor voltage tolerance, leading to inefficiencies and potential part failures, especially when trying to meet various interface standards and hot-plug requirements with existing protection methods.
Innovation Solution
An integrated device with a dynamic monitor that compares power supplies to generate a control signal, allowing for the selection of the appropriate power supply for I/O components, enabling over-voltage protection and efficient operation across different signaling environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If transistors are designed with higher performance (thinner gate-oxide, shorter channel length), then transistor speed and performance improve, but voltage tolerance decreases
Solution Approach 1:
The patent implements dynamic power supply selection that adapts to real-time voltage conditions. The system monitors power supply voltages and dynamically switches between different power supplies based on which one can safely support the high-performance I/O circuits without causing over-voltage damage. This dynamic adaptation allows the system to operate at maximum performance when voltage conditions permit while protecting the circuits when voltages are incompatible.
2Reliability
If I/O circuits are designed with slower transistors for higher voltage tolerance, then voltage tolerance improves, but signal interface bandwidth decreases
Solution Approach 1:
The system dynamically selects power supplies based on real-time voltage compatibility rather than using fixed slow transistors. When high-voltage-tolerance power supplies are available, the system can safely activate high-performance I/O circuits with bandwidth optimized for speed. When incompatible voltage conditions exist, the system switches to appropriate power supplies that match the voltage requirements, maintaining both performance and protection.
Solution Approach 2:
The patent changes the operating parameters of the I/O circuits by dynamically selecting different power supply voltages. This allows the same physical circuit to operate at different performance levels depending on voltage compatibility, rather than being locked into a fixed low-performance mode for all conditions.
3Adaptability or versatility
If programmable protection is implemented, then protection can be adjusted by programming, but the device is limited to specific modes of operation before configuration, leading to non-optimal performance and potential failures
Solution Approach 1:
The system performs preliminary voltage compatibility assessment before enabling I/O operations. The dynamic monitor continuously checks power supply voltages and determines compatibility with the I/O circuit requirements before allowing the circuits to operate. This preliminary verification prevents operation under incompatible conditions that could cause failures, eliminating the need to rely on default or minimal protection settings during configuration.
4Adaptability or versatility
If numerous power supplies and different circuit sections are used for different signaling applications, then versatility across interface standards improves, but efficiency decreases when some applications are not utilized
Solution Approach 1:
The system dynamically activates only the power supplies and circuit sections that are currently needed based on the active interface standards. Rather than having all power supplies continuously active, the system monitors which I/O interfaces are in use and enables only the corresponding power supply configurations, reducing power consumption when full versatility is not required.
Solution Approach 2:
The patent implements a universal power supply selection mechanism that can support multiple interface standards through a single dynamic control system. The same voltage monitoring and selection logic handles different signaling applications, eliminating the need for separate dedicated circuits for each standard and improving overall system efficiency.
Data Source
AI summary
In one embodiment of the invention, an integrated device has interface circuitry that includes a dynamic monitor that monitors the relative potential between (at least) two different power supplies to enable the device to react to over-voltage conditions such that appropriate selections can be made for which power supplies are selected for different components in the interface circuitry, such as output drivers and input receivers. The dynamic monitor enables over-voltage protection to be automatically implemented before the device has been configured, such as during the device's power-on state.