• Modern digital oscilloscopes offer a host of analysis capabilities since they digitize and store input waveforms for analysis. • Most oscilloscopes offer basic math operations such as addition, subtraction, multiplication, division, ratio, and the fast Fourier transform (FFT). • Mid- and high-end oscilloscopes offer advanced math functions such as differentiation and integration. • These tools let you solve differential equations that you probably hated in your days as an engineering student. • They are used the same way today in your oscilloscope measurements. • Here are a few examples of oscilloscope measurements that require differentiation and integration.
Article Summaries:
- Modern digital oscilloscopes now include advanced math functions-differentiation and integration-beyond basic arithmetic and FFT. These tools let users solve differential equations directly on the device, simplifying tasks that once required separate calculations. A common application is measuring capacitor current by differentiating the voltage across the capacitor and scaling by capacitance. The article demonstrates this with a simple series circuit, comparing the current derived from resistor voltage drop to that obtained via capacitor voltage differentiation. Results show a 0.7 % difference, confirming the method’s accuracy, while highlighting the noise amplification inherent in derivative calculations.
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