Waveform Measuring Apparatus for Ringing Peak-to-Peak Amplitude
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Solution Overview
Problem
Conventional waveform measuring devices cannot accurately measure the peak-to-peak amplitude of ringing in electric signal waveforms, which is essential for analyzing causes of overshoot and undershoot.
Innovation Solution
A waveform measuring apparatus comprising digital filters to separate large-amplitude and small-amplitude components, a window generating section to identify edge portions, and a ringing measurement section to extract and measure the peak-to-peak amplitude of ringing components, using ε filters to isolate and analyze the waveform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional waveform measuring devices are used, then overshoot and undershoot can be measured, but peak-to-peak amplitude of ringing cannot be measured
Solution Approach 1:
The patent segments the waveform measurement process into multiple stages: first separating the input signal into large-amplitude and small-amplitude components using a digital filter, then measuring different characteristics for each component. This segmentation enables the device to measure both overshoot/undershoot (from large-amplitude components) and peak-to-peak amplitude of ringing (from small-amplitude components), resolving the contradiction between measurement precision and adaptability.
Solution Approach 2:
The patent extracts the ringing component (small-amplitude noise) from the input signal using a digital filter that removes large-amplitude changing components. By taking out the ringing component separately, the device can then measure its peak-to-peak amplitude independently, enabling the conventional measuring device to acquire this previously unobtainable measurement capability.
2Measurement precision
If digital filter is used to remove large-amplitude component, then ringing can be isolated, but measurement complexity increases
Solution Approach 1:
The patent replaces complex analog signal processing mechanisms with digital filtering techniques. The digital filter processes the input signal through software algorithms, enabling precise separation of large-amplitude and small-amplitude components. This substitution of mechanical/analog processing with digital methods achieves high measurement precision for ringing while keeping the implementation relatively simple through standard digital signal processing operations.
Data Source
AI summary
A waveform measuring apparatus includes: a digital filter for removing a large-amplitude changing component from an input signal and for outputting a resultant output signal with a small-amplitude noise component left therein; a window generating section for receiving a differential signal between this input signal and the resultant output signal of the digital filter and for generating a window indicating a position of an edge portion of the differential signal; and a ringing measurement section for extracting, from the resultant output signal of the digital filter, a portion of waveform which is indicated by the window generated by the window generating section and for measuring at least a peak-to-peak amplitude of the portion of waveform.