ENGR 44 lab 13 Shubo C (high/low pass filter)

The data ffrom our group is off to much, so I use the data and pictures from other group.

Set up 

The H can be represent by Vout / Vin

When the frequency increase, the H decrease, and reach zero.

Max value,high-pass filter. It is determined by f, after a certain f, it decreases, not cannot see the curve after 10000

Conclusion: the lab is easy to do, but the calculation of the real question of finding H(w) is much more complicted. 

ENGR 44 lab 14 Shubo C bandwidth and signal (edit)

We did this lab in group of 5 people.

For this lab, our goal is to determine the B of the circuit, and compare experiment value with calculat value.

The number calculated

Set up

Adjust the frequency and current

Conclusion: Group of three people can learn more I think, not five. 

The higher resistance and capacitor, the less frequency, the less bandwith, from the formula, the frequency is propotion with bandwith.

Engr 44 lab 12 Shubo C ( edit)

AC voltage behave with a capacitor.

Coclusion: the capacitor was about 4uF around. And the graph show that as frequency increasing, the voltage of the capacitor drops. Watching lab is fun as usual.