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find R4 to get Vo / Vi  = -120

find R4 to get Vo / Vi  = -120

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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find R4 to get Vo / Vi  = -120 

**Op-Amp Circuit Diagram Explanation** This diagram illustrates a basic operational amplifier (op-amp) circuit configuration, demonstrating a feedback loop system. **Components:** - **Vi (Input Voltage):** The circuit begins with an input voltage labeled as \( V_i \). - **R1 (1 MΩ):** Connected in series with the input voltage \( V_i \), this resistor has a resistance of 1 megaohm. - **Op-Amp:** An ideal op-amp follows the input resistor, with its inverting input (-) connected to \( R_1 \) and the non-inverting input (+) grounded. - **Feedback Loop:** - **R2 (500 kΩ):** A resistor with a resistance of 500 kilo-ohms is part of the feedback loop. It connects the output of the op-amp back towards its inverting input. - **R3 (100 Ω):** A 100-ohm resistor is connected in parallel to the path between \( R2 \) and \( R4 \), and it is grounded. - **R4:** Another resistor is connected in series after \( R2 \), continuing the feedback loop back to the op-amp. **Vo (Output Voltage):** The final output voltage \( V_o \) is taken from the output of the op-amp. **Functionality:** This circuit likely functions as an amplifier with specific gain and load characteristics determined by the values and arrangement of resistors \( R1, R2, R3, \) and \( R4 \). The feedback loop helps to stabilize the gain and improve performance characteristics such as bandwidth and linearity in response to the input signal \( V_i \). **Note:** As this is an ideal op-amp, it assumes infinite open-loop gain, infinite input impedance, and zero output impedance.
Transcribed Image Text:**Op-Amp Circuit Diagram Explanation** This diagram illustrates a basic operational amplifier (op-amp) circuit configuration, demonstrating a feedback loop system. **Components:** - **Vi (Input Voltage):** The circuit begins with an input voltage labeled as \( V_i \). - **R1 (1 MΩ):** Connected in series with the input voltage \( V_i \), this resistor has a resistance of 1 megaohm. - **Op-Amp:** An ideal op-amp follows the input resistor, with its inverting input (-) connected to \( R_1 \) and the non-inverting input (+) grounded. - **Feedback Loop:** - **R2 (500 kΩ):** A resistor with a resistance of 500 kilo-ohms is part of the feedback loop. It connects the output of the op-amp back towards its inverting input. - **R3 (100 Ω):** A 100-ohm resistor is connected in parallel to the path between \( R2 \) and \( R4 \), and it is grounded. - **R4:** Another resistor is connected in series after \( R2 \), continuing the feedback loop back to the op-amp. **Vo (Output Voltage):** The final output voltage \( V_o \) is taken from the output of the op-amp. **Functionality:** This circuit likely functions as an amplifier with specific gain and load characteristics determined by the values and arrangement of resistors \( R1, R2, R3, \) and \( R4 \). The feedback loop helps to stabilize the gain and improve performance characteristics such as bandwidth and linearity in response to the input signal \( V_i \). **Note:** As this is an ideal op-amp, it assumes infinite open-loop gain, infinite input impedance, and zero output impedance.
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