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Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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In this Differential Op Amp, what formulas should I use to find R1, R3, and Rp when V1, V2, and Vout are already given?
This image contains a schematic diagram of a differential amplifier circuit using an operational amplifier (op-amp). ### Components and Connections: - **Inputs:** - \( V_1 \) and \( V_2 \) are the input voltages. - **Resistors:** - \( R_1 \): Two identical resistors connected to the inputs \( V_1 \) and \( V_2 \). - \( R_3 \): Resistor connected from the inverting input of the op-amp to the output. - \( R_P \): Potentiometer connected from the non-inverting input of the op-amp to ground. - **Op-Amp:** - The op-amp has two inputs: inverting \((-)\) and non-inverting \((+)\). - The output is labeled \( V_{\text{out}} \). - **Feedback:** - The resistor \( R_3 \) forms a feedback loop from the output to the inverting input. ### Functionality: This configuration is typically used for a differential amplifier where the output voltage \( V_{\text{out}} \) is proportional to the difference between the input voltages \( V_1 \) and \( V_2 \). The resistors \( R_1 \), \( R_3 \), and the potentiometer \( R_P \) can be adjusted to tweak the gain and the offset for more precise measurements. ### Applications: Differential amplifiers are common in applications requiring amplification of the difference between two signals, often used in the fields of instrumentation and audio engineering.
Transcribed Image Text:This image contains a schematic diagram of a differential amplifier circuit using an operational amplifier (op-amp). ### Components and Connections: - **Inputs:** - \( V_1 \) and \( V_2 \) are the input voltages. - **Resistors:** - \( R_1 \): Two identical resistors connected to the inputs \( V_1 \) and \( V_2 \). - \( R_3 \): Resistor connected from the inverting input of the op-amp to the output. - \( R_P \): Potentiometer connected from the non-inverting input of the op-amp to ground. - **Op-Amp:** - The op-amp has two inputs: inverting \((-)\) and non-inverting \((+)\). - The output is labeled \( V_{\text{out}} \). - **Feedback:** - The resistor \( R_3 \) forms a feedback loop from the output to the inverting input. ### Functionality: This configuration is typically used for a differential amplifier where the output voltage \( V_{\text{out}} \) is proportional to the difference between the input voltages \( V_1 \) and \( V_2 \). The resistors \( R_1 \), \( R_3 \), and the potentiometer \( R_P \) can be adjusted to tweak the gain and the offset for more precise measurements. ### Applications: Differential amplifiers are common in applications requiring amplification of the difference between two signals, often used in the fields of instrumentation and audio engineering.
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