TLP Measurement Using Distributed Sensing Probes
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Solution Overview
Problem
Existing Transmission Line Pulse (TLP) techniques face limitations in achieving high time resolution while allowing for arbitrarily long pulse durations, due to measurement errors caused by cable length and the need for close proximity of oscilloscope probes to the device under test.
Innovation Solution
An apparatus comprising a conductor with predetermined impedance and pulse propagation velocity, and at least two sensing probes positioned at different measurement points, allows for the determination of the response of a device under test to an electrical pulse with arbitrarily long duration, while achieving high time resolution by measuring transit times between sensing probes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If oscilloscope probes are positioned close to the device under test to avoid measurement errors, then measurement precision is improved, but the pulse duration is limited and time resolution is reduced
Solution Approach 1:
The patent divides the measurement system into multiple sensing probes positioned at different locations along the conductor, each measuring voltage at its specific position. This segmentation allows the system to reconstruct the complete voltage and current waveforms at the device under test by combining measurements from multiple points, thereby achieving both long pulse duration and high measurement precision without requiring probes to be positioned extremely close to the device.
Solution Approach 2:
The patent introduces a distributed sensing system along the conductor as an intermediary between the pulse generator and the device under test. This intermediary system provides multiple measurement points that capture voltage and current information throughout the conductor, enabling accurate determination of device response without the need for probe proximity to the device, thus allowing longer pulse durations while maintaining measurement precision.
2Duration of action of moving object
If the conductor length is increased to allow longer pulse durations, then pulse duration is improved, but measurement errors increase due to cable length
Solution Approach 1:
The patent segments the conductor into multiple measurement sections with sensing probes distributed along its length. Each probe measures voltage at its specific location, and the system reconstructs the complete waveform by combining these segmented measurements. This approach allows the conductor to be sufficiently long for long pulse durations while maintaining measurement precision through distributed sensing rather than relying on a single proximity-based measurement point.
Solution Approach 2:
The patent replaces the traditional single-point mechanical proximity measurement system with a distributed sensing system that uses multiple measurement points along the conductor. This substitution eliminates the trade-off between conductor length and measurement precision by using multiple probes to capture voltage and current information throughout the entire conductor, enabling long pulse durations without the measurement errors associated with single-point measurements on long cables.
3Loss of time
If Very Fast TLP techniques are used with single voltage sensor to achieve high time resolution, then time resolution is improved, but only very short pulses can be used due to cable loss
Solution Approach 1:
The patent segments the measurement function across multiple sensing probes distributed along the conductor, each capturing voltage at its location. This segmentation enables the system to achieve high time resolution by measuring voltage at multiple points simultaneously while supporting longer pulse durations because the distributed sensing architecture reduces cable loss effects compared to single-point measurement systems.
Solution Approach 2:
The patent creates a universal measurement system that can handle both very short pulses (for high time resolution) and longer pulses (for comprehensive ESD testing) using the same distributed sensing architecture. The multi-functional system uses multiple sensing probes to capture voltage and current information throughout the conductor, making it adaptable to different pulse durations without the cable loss limitations of single-sensor Very Fast TLP systems.
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 solution enables the determination of voltage and current at the device under test with high time resolution, overcoming the limitations of traditional TLP systems by allowing longer pulse durations and shorter conductor lengths, thus combining the advantages of both TLP and Very Fast TLP systems.
Implementation Method 1
a conductor for coupling the electrical pulse generator to the device under test, wherein the conductor has a predetermined electrical impedance and a predetermined pulse propagation velocity
Implementation Method 2
each of the at least two sensing probes is positioned at one of at least two measurement points on the conductor and is configured to generate a signal in direct proportion to a current or a voltage applied to the conductor at the corresponding measurement point
Implementation Method 3
a distance between two of these different measurement points on the conductor is respectively defined in such a way, that a transit time of the electrical pulse between these two different measurement points can be determined
Data Source
AI summary
An apparatus for determining a response of a device under test to an electrical pulse generated by a pulse generator. The apparatus can include a conductor for coupling the electrical pulse generator to the device under test and at least two sensing probes connected to the conductor. Each of the at least two sensing probes can be positioned at one of at least two measurement points and can be configured to generate a signal in direct proportion to a current flowing in or a voltage applied to the conductor at the corresponding measurement point. A determination device can be configured to determine the response of the device under test to the electrical pulse based on the signals generated by the at least two sensing probes nd the transit times of the electrical pulse between these different measurement points.


