Question
Download Solution PDFThe input impedance of an ideal Op-amp is ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2.
Operational Amplifier
An Operational Amplifier is basically a three-terminal device that consists of two high-impedance inputs.
One of the inputs is called the Inverting Input, marked with a negative or “minus” sign, ( – ). The other input is called the Non-inverting Input, marked with a positive or “plus” sign ( + ).
The output of the OP-AMP is given by:
\(V_o=A_{OL}({V_+-V_-)}\)
where, AOL = Gain of OP-AMP
V+ = Input at the non-inverting terminal
V- = Input at the inverting terminal
Characteristics of ideal OP-AMP
- Infinite input impedance
- Zero output impedance
- Infinite voltage gain
- Infinite CMRR
- Infinite slew rate
- Zero offset voltage
- Zero input bias current
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