(6/8/17) Day 27:Filters and Passive RL Filter

Day 27: Filters

Lab:

Passive RL Filter

A passive RL filter is one that makes use of the traits of the inductive component to filter out voltages at lower and higher frequencies (depending on the set up). This lab will experimentally show the behavior of such a circuit and hopefully verify the textbook's explanation of it.

Prelab:

Our first task was to figure out the cutoff frequency for this specific circuit.

with values of R = 100 ohms and L = 1mH

with the cut off being calculated as 1E5.

If theory proves correct, this circuit should limit voltages at frequencies below this value.

Procedure:

Once the circuit was built, we set up the oscilloscope to read the output.

The input was a range of sinusoid voltages that we tabulated the reaction for. The V (output) section is the voltage being read on the inductor.

 Summary:

Taking the voltage from the inductor to be output of the circuit, we can deduce that at frequencies begin to drop! This is indicative of a high pass filter!