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The graph you’ve provided is a Bode plot showing the AC sweep of an inverting amplifier circuit. This graph typically displays the voltage gain in relation to frequency, and from the plot, it appears to be a low-pass filter configuration. The curve starts flat, showing that the gain is steady until a certain frequency is reached, after which the gain decreases significantly, marking the cutoff frequency.

### Identifying the cutoff frequency:
The cutoff frequency, often denoted \( f_c \), is where the output signal voltage drops to 70.7% (or \(-3 \, \text{dB}\)) of its maximum value. Based on the figure:

- The input voltage \( V_{in} \) is approximately 7.8 V.
- The cutoff voltage \( V_{out} \) should be approximately 70.7% of 7.8 V, which is around **5.5 V**.
- The drop in voltage at around 167 kHz corresponds closely to this value, indicating that **167 kHz** is the cutoff frequency.

### Answer:
The correct cutoff frequency from the options is **167 kHz**, so the correct choice is:

**Option a: 167 kHz**

Would you like more detailed clarification, or do you have any other questions?

### 5 Related Questions:
1. What is the significance of the -3 dB point in amplifier circuits?
2. How does the bandwidth relate to the cutoff frequency in a low-pass filter?
3. What are the common applications of inverting amplifiers in electronic circuits?
4. How would the cutoff frequency change if the components in the amplifier circuit were adjusted?
5. What is the role of the feedback resistor in determining the amplifier's frequency response?

### Tip:
In low-pass filters, increasing the resistance or capacitance in the circuit will lower the cutoff frequency, while decreasing them will raise it.

The AC sweep of an inverting amplifier circuit is shown. The cutoff frequency read from the figure is: a) 167 kHz, b) 3.9 Hz, c) 5.5 Hz, d) 7.8 Hz, e) 270 kHz.

Learn how to identify the cutoff frequency in an inverting amplifier AC sweep. This problem involves understanding Bode plots and calculating the cutoff point based on the -3 dB rule. Suitable for undergraduate electrical engineering students.

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