Equipment: Proto-Board Digital Multimeter Dual Power Supply Function Generator A

Question

Equipment:

Proto-Board

Digital Multimeter

Dual Power Supply

            Function Generator

            Audio Source (a music CD may be played in the lab station computer)

            Powered Speakers (supplied by your instructor)

            Audio Patch Cables and Connectors (supplied by your instructor)

            Resistor Decade Boxes

            Lab Parts Kit(s)

Pre-Laboratory Assignment:

Also bring an audio source. (CD or MP3 player) You may go ahead and answer Question 1.

In-Laboratory Assignment:

Figure 1: Audio Filter Circuit

Explanation / Answer

uestion 1 ::::

Fc = cutoff frequency = (1/2pi)*1/(R3*R5*C5*C1)^0.5

R3*R5 = 52388*10^3 ohm

R3 =R2 =7.23 k ohm

question2 ::;

cut off frequency = 1.02 KHz

question 6 :::: low pass filter (LP)

question 7 ::; Av = gain = 1 +R1/R2 = 1 +5.1/10   = 1.51

   gain (db) = 20log(Av) =3.57 db

question 8 ::: resistance will decrese with rise in cut off frequency

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