I built the amplifier circuit shown, and performed measurements to compare with the values I calculated.
Of particular interest to me is that I expected the base voltage to be about 1.97 volts (I assumed that this was calculated by simply finding the voltage dividers output voltage), but measured a voltage of 1.57 volts. This must mean I have to take some loading of the voltage divider into consideration, but I am not sure what is loading it.
Any explanation would be lovely, thank you.
Also, on a side note, I noticed the gain increased significantly, and then fell off once I passed a certain frequency. Could this be due to some resonance? This was built on a breadboard if that makes a difference.
Of particular interest to me is that I expected the base voltage to be about 1.97 volts (I assumed that this was calculated by simply finding the voltage dividers output voltage), but measured a voltage of 1.57 volts. This must mean I have to take some loading of the voltage divider into consideration, but I am not sure what is loading it.
Any explanation would be lovely, thank you.
Also, on a side note, I noticed the gain increased significantly, and then fell off once I passed a certain frequency. Could this be due to some resonance? This was built on a breadboard if that makes a difference.