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An operational armplifier connected in a noninverting configuration has an open-loop gain of AOL= 105. The resistors are R2 = 495kQ and R1 = 5kQ. (a) Determine the actual and ideal

An operational armplifier connected in a noninverting configuration has an open-loop gain of AOL= 105. The resistors are R2 = 495kQ and R1 = 5kQ. (a) Determine the actual and ideal

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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close loop gains

**Understanding Noninverting Operational Amplifier Configurations** An operational amplifier connected in a noninverting configuration has an open-loop gain (AOL) of 105. The resistors are specified as R2 = 495 kΩ and R1 = 5 kΩ. The task is to determine both the actual and ideal gain of the amplifier. **Concepts to Explore:** 1. **Operational Amplifier (Op-Amp):** - An electronic device used to amplify voltage. - Configurations include inverting and noninverting. 2. **Noninverting Amplifier Configuration:** - Provides a positive voltage gain. - The input signal is applied to the non-inverting (+) terminal. 3. **Open-Loop Gain (AOL):** - The gain of the amplifier without any feedback. - In this scenario, AOL = 105. 4. **Closed-Loop Gain:** - Gain when feedback is applied. - In a noninverting amplifier: \[ \text{Gain} = 1 + \frac{R2}{R1} \] - Calculations: \[ \text{Ideal Gain} = 1 + \frac{495\, k\Omega}{5\, k\Omega} = 1 + 99 = 100 \] - Assuming high open-loop gain, actual gain approximates the ideal gain. **Practical Application:** - When implementing this circuit, the actual gain can vary slightly due to the finite open-loop gain and real-world component tolerances. - Useful in applications requiring precise voltage amplification without phase inversion. Understanding this configuration aids in designing amplifiers for audio equipment, signal processing, and other electronic applications.
Transcribed Image Text:**Understanding Noninverting Operational Amplifier Configurations** An operational amplifier connected in a noninverting configuration has an open-loop gain (AOL) of 105. The resistors are specified as R2 = 495 kΩ and R1 = 5 kΩ. The task is to determine both the actual and ideal gain of the amplifier. **Concepts to Explore:** 1. **Operational Amplifier (Op-Amp):** - An electronic device used to amplify voltage. - Configurations include inverting and noninverting. 2. **Noninverting Amplifier Configuration:** - Provides a positive voltage gain. - The input signal is applied to the non-inverting (+) terminal. 3. **Open-Loop Gain (AOL):** - The gain of the amplifier without any feedback. - In this scenario, AOL = 105. 4. **Closed-Loop Gain:** - Gain when feedback is applied. - In a noninverting amplifier: \[ \text{Gain} = 1 + \frac{R2}{R1} \] - Calculations: \[ \text{Ideal Gain} = 1 + \frac{495\, k\Omega}{5\, k\Omega} = 1 + 99 = 100 \] - Assuming high open-loop gain, actual gain approximates the ideal gain. **Practical Application:** - When implementing this circuit, the actual gain can vary slightly due to the finite open-loop gain and real-world component tolerances. - Useful in applications requiring precise voltage amplification without phase inversion. Understanding this configuration aids in designing amplifiers for audio equipment, signal processing, and other electronic applications.
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The infinite close loop gain for the non-inverting op-amp is given as:

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