High Precision Clipping Regulator Circuit for Overvoltage Protection
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Solution Overview
Problem
Electronic systems, particularly those in space vehicles, face challenges in maintaining high accuracy and precision while being protected from postulated worst-case scenarios, as existing protection circuits fail to provide suitable protection without compromising operational precision.
Innovation Solution
A high precision clipping regulator circuit incorporating protection diodes and offset clamp voltage regulators, which dynamically adjust clamp voltages to maintain constant voltage differences when diodes conduct, ensuring overvoltage protection without affecting precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protection circuits are added to protect electronic systems from worst-case scenarios, then reliability is improved, but manufacturing precision and operational accuracy deteriorate due to voltage variations in protection diodes
Solution Approach 1:
The circuit employs feedback mechanisms where the offset clamp voltage regulators continuously monitor the voltage across the protection diodes and dynamically adjust the clamp voltages to maintain a constant voltage difference. This feedback loop compensates for manufacturing variations in the protection diodes, ensuring both reliability through overvoltage protection and precision in voltage regulation.
Solution Approach 2:
The invention changes the parameters of the protection circuit by introducing variable offset clamp voltages that are dynamically adjusted based on the actual performance of the protection diodes. Instead of using fixed clamp voltages, the system adapts the clamp voltage levels to match the actual forward voltage drops of the protection diodes, thereby maintaining precision despite manufacturing variations.
2Measurement precision
If accuracy of electronic systems is improved, then performance is enhanced, but sensitivity to worst-case scenarios increases
Solution Approach 1:
The circuit provides beforehand cushioning by pre-establishing protective clamp voltage levels that are dynamically set based on the actual characteristics of the protection diodes. This prior cushioning approach ensures that when overvoltage events occur, the system is already protected at the appropriate voltage level, allowing high accuracy operation while being buffered against worst-case scenarios.
3Device complexity
If fixed clamp voltage regulators are used in protection circuits, then device complexity is reduced, but manufacturing precision worsens due to inability to compensate for diode voltage variations
Solution Approach 1:
The invention transitions from static fixed clamp voltage regulators to dynamic offset clamp voltage regulators that automatically adjust their output based on the voltage across the protection diodes. This dynamic approach maintains relatively simple circuit architecture while achieving high precision voltage clamping that compensates for manufacturing variations in the protection diodes.
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
The circuit effectively protects electronic systems from overvoltage faults and other postulated scenarios, allowing them to operate at maximum precision and performance by maintaining stable voltage differences across diodes.
Implementation Method 1
The first protection diode has a first anode and a first cathode, is configured to conduct when a voltage potential between the first anode and first cathode exceeds a first protection voltage magnitude
Data Source
AI summary
A high precision clipping regulator circuit includes a first protection diode, a second protection diode, a first offset clamp voltage regulator, and a second offset clamp voltage regulator. The first protection diode is configured to conduct when a voltage potential exceeds a first protection voltage magnitude, and is operable to exhibit variations in the first protection voltage magnitude. The second protection diode is configured to conduct when a voltage potential exceeds a second protection voltage magnitude, and is operable to exhibit variations in the second protection voltage magnitude. The first reference and second voltage regulator circuits are configured to determine when the first and second protection voltages vary and, in response thereto, to vary the first and second variable offset clamp voltages so that a difference in voltage across the protection diodes remains substantially constant.