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Douglas Edward
Douglas Edward
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I have simulated the frequency response of aan amplifier circuit. Frequency range is from 10 Hz to 2.5 MHz. It gave me a plot with a y-axis range going from -50 to 50. I assume these are dBs but I am not sure.

I need to find the bandwidth of the amplifier. To do this, I know that I need to find the lower 3b and upper 3b point. But I am not sure how to find them. I know I have to dividemultiply something by 0.707 but I am not sure what. Is it the dB value at the peak of the plot that I need to dividemultiply by 0.707, and the result would be the corresponding dB value for the upper and lower frequencies?

Thank you.

I have simulated the frequency response of a circuit. Frequency range is from 10 Hz to 2.5 MHz. It gave me a plot with a y-axis range going from -50 to 50. I assume these are dBs but I am not sure.

I need to find the bandwidth of the amplifier. To do this, I know that I need to find the lower 3b and upper 3b point. But I am not sure how to find them. I know I have to divide something by 0.707 but I am not sure what. Is it the dB value at the peak of the plot that I need to divide by 0.707, and the result would be the corresponding dB value for the upper and lower frequencies?

Thank you.

I have simulated the frequency response of an amplifier circuit. Frequency range is from 10 Hz to 2.5 MHz. It gave me a plot with a y-axis range going from -50 to 50. I assume these are dBs but I am not sure.

I need to find the bandwidth of the amplifier. To do this, I know that I need to find the lower 3b and upper 3b point. But I am not sure how to find them. I know I have to multiply something by 0.707 but I am not sure what. Is it the dB value at the peak of the plot that I need to multiply by 0.707, and the result would be the corresponding dB value for the upper and lower frequencies?

Thank you.

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Douglas Edward
Douglas Edward
  • 1k
  • 4
  • 15
  • 22

How to find lower 3dB and upper 3dB from PSPICE frequency response

I have simulated the frequency response of a circuit. Frequency range is from 10 Hz to 2.5 MHz. It gave me a plot with a y-axis range going from -50 to 50. I assume these are dBs but I am not sure.

I need to find the bandwidth of the amplifier. To do this, I know that I need to find the lower 3b and upper 3b point. But I am not sure how to find them. I know I have to divide something by 0.707 but I am not sure what. Is it the dB value at the peak of the plot that I need to divide by 0.707, and the result would be the corresponding dB value for the upper and lower frequencies?

Thank you.