https://file.aiquickdraw.com/mathbot/file/172649651116496949wm5.pdf

The document appears to be a midterm assignment for an Electronics II course at Southeast University, focusing on circuit design using operational amplifiers (op-amps). Here's a breakdown of the problems:

1. **Three-stage Amplifier Design**: You need to connect an LM124 quad op-amp as a three-stage amplifier with gains of +25, -22, and -35, using a 420-kΩ feedback resistor for all stages. Then, calculate the output voltage for an input of 80 μV.

2. **Differential Amplifier Design**: You're tasked with determining the output voltage of a circuit (Fig.1) and designing a Differential Amplifier to achieve the same output as Fig.1.

3. **Offset Voltage Calculation**: For a given op-amp circuit (Fig. 14.27), calculate the total offset voltage when the input offset voltage \(V_{IO}\) is 4.5 mV and the input offset current \(I_{IO}\) is 160 nA.

4. **Conversion of Amplifier Types**: You need to explain how to convert a difference amplifier into an inverting amplifier and an integrator. Additionally, sketch the output voltage of the differentiator for a given input (in Fig.3), with \(v_o = 0\) at \(t = 0\), and show detailed calculations.

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### Related questions:
1. How do you calculate the output voltage for a three-stage amplifier?
2. What is the principle behind designing a differential amplifier?
3. How does input offset voltage and current affect op-amp performance?
4. What is the difference between inverting and non-inverting amplifier circuits?
5. How do differentiators and integrators function in op-amp circuits?

**Tip**: When working with op-amp circuits, always check for the correct sign of the gain (positive or negative) to avoid incorrect phase behavior in the output.

The document contains an assignment from an Electronics II course at Southeast University. The user is tasked with solving problems related to op-amp circuit design, including a three-stage amplifier design, a differential amplifier, total offset voltage calculations, and converting a difference amplifier into an inverting amplifier and integrator.

This assignment focuses on designing a three-stage amplifier using LM124 op-amps with gains of +25, -22, and -35, along with calculating the output voltage for a differential amplifier and the total offset voltage for a given op-amp circuit. It also covers the conversion of a difference amplifier into an inverting amplifier and integrator. Suitable for students in undergraduate electrical engineering courses.

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