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Swapnil
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Hi, I was wondering why is it that the input current for an ideal op-amp is always zero? They say that it is zero because of infinite impedence but where exactly is this impedence? Across the op-amp?
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Swapnil said:Hi, I was wondering why is it that the input current for an ideal op-amp is always zero? They say that it is because of infinite impedence but where exactly is this impedence? Across the op-amp?
An ideal op-amp circuit is a theoretical model of an operational amplifier that has infinite input impedance, zero output impedance, infinite open-loop gain, and zero input current. It is often used as a simplified model in circuit analysis and design.
Zero input current in ideal op-amp circuits refers to the lack of current flowing through the input terminals of the op-amp. This is due to the infinite input impedance of the ideal op-amp, which means that no current can flow into or out of its input terminals.
Exploring the zero input current of ideal op-amp circuits is important because it allows us to understand the behavior and characteristics of op-amps in different circuit configurations. It also helps in designing and analyzing op-amp circuits for various applications.
The zero input current of ideal op-amp circuits can be measured by connecting a digital multimeter between the input terminals of the op-amp and setting it to measure current. The reading on the multimeter should be close to zero, indicating the absence of input current.
In theory, yes, the zero input current of ideal op-amp circuits should be exactly zero. However, in practical circuits, there may be some small amounts of current due to imperfections and limitations of real op-amps. This is why it is important to understand and explore the zero input current in ideal op-amp circuits, as it can affect the overall performance of a circuit.