In electronic circuits using operational amplifiers (op-amps), what is the purpose of a "virtual ground"?To increase the input impedance of the op-amp.To eliminate the need for power supplies.To create a real electrical connection to the Earth's surface.To provide a reference point for signal voltages
Question
In electronic circuits using operational amplifiers (op-amps), what is the purpose of a "virtual ground"?To increase the input impedance of the op-amp.To eliminate the need for power supplies.To create a real electrical connection to the Earth's surface.To provide a reference point for signal voltages
Solution
The purpose of a "virtual ground" in electronic circuits using operational amplifiers (op-amps) is to provide a reference point for signal voltages.
Here's a step-by-step explanation:
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Operational amplifiers (op-amps) are differential amplifiers, meaning they amplify the difference in voltage between their two input terminals, which are labeled as the inverting (-) and the non-inverting (+) inputs.
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In many op
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