Question
Download Solution PDFWhich of the options is correct for a non-inverting OP-AMP?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Non-Inverting OP-AMP
A non-inverting operational amplifier (OP-AMP) is a type of amplifier where the input signal is applied to the non-inverting terminal, resulting in an output that is in phase with the input signal. This configuration contrasts with an inverting OP-AMP, where the input signal is applied to the inverting terminal, causing the output signal to be inverted.
Working Principle: The inverting terminal (-) is connected to a portion of the output signal through a feedback network, typically a resistor network. The OP-AMP amplifies the difference between the voltages at the non-inverting and inverting terminals. Because the input is applied to the non-inverting terminal, the output signal is in phase with the input signal.
Important Information for Analysis of Other Options:
Option 1: The Input is applied at the inverting terminal of the OP-AMP
This statement describes an inverting OP-AMP configuration, not a non-inverting one. In an inverting OP-AMP, the input signal is applied to the inverting terminal, resulting in an output that is inverted (180 degrees out of phase) compared to the input signal.
Option 2: Non-inverting terminal of the OP-AMP is grounded
This statement is incorrect for a non-inverting OP-AMP. Grounding the non-inverting terminal would mean there is no input signal applied to it. In a non-inverting configuration, the input signal must be applied to the non-inverting terminal for the OP-AMP to function correctly.
Option 3: For a negative input, the output is positive
This statement does not accurately describe the behavior of a non-inverting OP-AMP. The output of a non-inverting OP-AMP is in phase with the input signal, meaning that if the input is negative, the output will also be negative. If the input is positive, the output will be positive.
Option 4: Output is in phase with input
This statement is correct for a non-inverting OP-AMP. In a non-inverting configuration, the output signal is in phase with the input signal, meaning there is no phase shift between the input and output.
Last updated on Jun 7, 2025
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