Detector Signal Processing Edge-Controlled Reset Mechanism
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Solution Overview
Problem
Existing detector signal processing methods face challenges in efficiently managing output voltage resets to prevent signal loss and ensure accurate evaluation, particularly at high photon energies and high counting rates, due to the difficulty in precisely controlling reset pulse widths and the need for additional adjustment units.
Innovation Solution
The method employs an edge-controlled reset, where the reset is triggered by a signal edge to a fixed minimal voltage value, independent of pulse width, allowing for flexible reset timing and reducing the need for precise pulse width adjustment, thereby minimizing signal loss and increasing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the output voltage is reset when it exceeds the maximum voltage, then the signal processing can continue, but the threshold event cannot be fully evaluated and signal loss occurs
Solution Approach 1:
The patent applies preliminary action by resetting the output voltage before it reaches the maximum voltage limit. The reset is triggered when the voltage exceeds a threshold that is lower than the maximum voltage, allowing the threshold event to be fully evaluated and stored in memory before the reset occurs. This prevents signal loss while maintaining processing continuity.
2Measurement precision
If the reset pulse width is precisely controlled, then the signal processing accuracy is improved, but the device complexity increases due to additional adjustment units
Solution Approach 1:
The patent applies self-service by using the signal processor's own resources to control the reset timing. The reset is triggered by a threshold comparison within the signal processor itself, eliminating the need for external adjustment units or complex pulse width control circuits. The signal processor monitors its own output voltage and automatically initiates reset when the threshold is exceeded.
3Loss of information
If the reset is triggered immediately when voltage exceeds threshold, then signal loss is minimized, but the processing time for threshold events is reduced
Solution Approach 1:
The patent applies preliminary action by triggering the reset before the voltage reaches the maximum limit. This allows sufficient time for the threshold event to be fully evaluated and stored in memory (taking into account the processing time determined by filter constants) before the reset occurs, thereby minimizing signal loss while maintaining adequate processing time.
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 approach ensures that threshold events are fully evaluated before reset, reducing signal loss and increasing measurement statistics, while allowing for flexible use across different applications with varying amplification factors and detector types.
Implementation Method 1
the detector is configured to detect an incidence of a photon as a detection event
Implementation Method 2
the amplifier is configured to process the detection event detected by the detector to an output voltage
Data Source
AI summary
In an embodiment a method for processing a detector signal by a signal chain includes detecting, by a detector, a plurality of detection events, increasing an output voltage of an amplifier after each detection event, and resetting the output voltage of the amplifier when the output voltage exceeds a threshold due to a threshold event, wherein the threshold is smaller than a maximum voltage value determined by an overdrive value of an input voltage of a signal processor to which the output voltage of the amplifier is connected, wherein resetting is determined by processing of the threshold event only irrespective of other detection events, and wherein a reset is triggered by a signal edge of a reset pulse.