Below is a passive filter circuit shown in figure Q2. For the following parts, include all

calculations and equations used.

Component values are:

R1 = 1 KQ, R2 = 3300, R3=1.8 KQ, R4 = 2700, R5= 6600, C1= 10nF, C2 = 0.01μF, C3 =

20nF.

a) Identify what the cut off frequency of the circuit is. (10 marks)

b) What is the roll-off or slope for this circuit in the stop band and why? (6 marks)

c)

Vin

If R5 was not correctly placed in the breadboard and fell out of the breadboard

completely, would the cut off frequency increase or decrease, justify your decision?

(4 marks)

C1

H

C3

C2

HH

R1

R2

R3

R4

GND

Figure Q2. Passive filter circuit

R5

V out