Explanation Given Information: Output voltage of the op-amp with no input applied = − 0.2 V Input bias current is very small, not considered. Resistance values R2 = 100 k Ω , R1 = 2 k Ω DC output voltage with input grounded − 0.2 V . Calculation: An inverting based op-amp circuit is shown below. For this circuit, there is no applied input voltage and the output voltage is given to be − 0.2 V . This output is due to the presence of input offset voltage at the input terminals of the op-amp. In practical cases, even when the two terminals of the op-amp are grounded, there will be a finite dc voltage appearing at the output which will be either into a positive or negative saturation due to large dc gain of the op-amp. This implies the presence of a dc voltage at the input, which is the input offset voltage which can be negative or positive. Here, it appears at the non-inverting terminal The output and input of an inverting circuit can be related using the general expression as Vout Vin = − R2 R1 Here the output voltage is Vos and input voltage is Vios accounting to the input offset voltage phenomenon

Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition

7th Edition

ISBN: 9780199339136

Author: Adel S. Sedra, Kenneth C. Smith

Publisher: Oxford University Press

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Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output p…

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Chapter 2, Problem 2.94P

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Input offset voltage of an op-amp in inverting configuration.

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Chapter 2, Problem D2.93P

Chapter 2, Problem 2.95P

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Chapter 2 Solutions

Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition

Ch. 2.1 - Prob. 2.1E Ch. 2.1 - Prob. 2.2E Ch. 2.1 - Prob. 2.3E Ch. 2.2 - Prob. D2.4E Ch. 2.2 - Prob. 2.5E Ch. 2.2 - Prob. 2.6E Ch. 2.2 - Prob. D2.7E Ch. 2.2 - Prob. D2.8E Ch. 2.3 - Prob. 2.9E Ch. 2.3 - Prob. 2.10E

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Input offset voltage of an op-amp in inverting configuration.

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