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Can a differential amplifier be used to measure shunt resistor?
When the shunt resistor is not connected with the measuring circuit in either way of VCC and GND then we can say that the shunt resistor is floating or a High side shunt resistor. In this case, we can use a differential amplifier to measure the voltage across that shunt resistor.
How are op amps used in current sensing?
(op amps) or analog-to-digital converters (ADCs), whether they be standalone or embedded in a microcontroller (MCU), and provide the ultimate flexibility to leveraging a wide range of tailored components specifically designed for current sensing but also address challenges in a specific way.
How is DC current measured in a circuit?
DC Current measurement using Shunt resistor and Op-Amp circuit. DC Current measurement using Shunt resistor and Op-Amp circuit. Only a few components to set, calculations, and working principles are here…
What does shunt resistor mean in current sensing?
Shunt resistor based current sensing: A shunt resistor is a resistor with very low in resistance. Sometimes it is a metal piece. Sometimes it is a PCB trace, sometimes it is a normal resistor. Whatever it is, the resistance of a shunt resistor is too low so that the power loss across the resistor become very low.
How does inversion work in an inverting amplifier?
Here is the circuit: Inversion corresponds to a negative closed-loop gain (for example, G CL = –10). Since V OUT = V IN × G CL, a negative gain will cause a positive input voltage to become a negative output voltage and a negative input voltage to become a positive output voltage.
How is the output voltage of an inverting amplifier determined?
The feedback resistor Rƒ sets the operating voltage point at the inverting input and controls the amount of output. The output voltage is given as Vout = Is x Rƒ. Therefore, the output voltage is proportional to the amount of input current generated by the photo-diode.