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Voltage and current sampling [Copy link]

1. Current sampling (capacitors must be added to the input and output amplifiers)

To collect the current at a point, use a small precision resistor to collect the voltage, and then divide it by the resistance value of the resistor to calculate the current.

The small voltage is amplified by differential ratio, and then sampled and processed by the microcontroller

Circuit diagram: Differential ratiometric op amp circuit


Analog Electronics Technology Basics P333 Differential Ratio Operational Amplifier Circuit and Improved High Input Resistance Differential Ratio Operational Amplifier Circuit

Voltage sampling (with capacitor filtering)

This post is from Analogue and Mixed Signal

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