We also connected (CH B, +) between the resistor and the capacitor, (CH B, -) with the ground. We connected the oscilloscope setting (CH A, +) at the beginning of the circuit and (CH A, -) with the ground. We set the function generator at sine wav, 5VP and 1KHz. In the function generator we connected the (+) at the beginning of the circuit and (COM) with the ground. We started by connecting the resistor, capacitor, inductor and function generator in series, also including ground. We also connected (CH B, +) between the resistor and the capacitor, (CH B, -) with the ground.Īt last, we designed a series RLC Band Stop Filter circuit with Q= 10, fo= 5KHz with a resistor value of 1KΩ. We set the function generator in sine wave, 5VP and 400Hz. In the function generator, we connected the (+) at the beginning of the circuit and (COM) with the ground.

We used Bode Plot instrument in Multisim to draw the Bode plot curve and compare it with the Bode plot on the logarithmic paper (2).įurthermore, we designed a series RLC Band Pass Filter circuit with a Bandwidth of 250Hz and a center frequency of 750Hz with a capacitor value of 100nF. We used the values to draw the Bode plot on the logarithmic paper (2). We used breadboard to construct the circuit and set the function generator on 1KHz, sine wave at 5VP, and then measured the output voltage and recorded the readings. Secondly, with High Pass Filter circuit we looked for the required value of the inductor which was 20mH to get a critical frequency of 5KHz with a resistor value of 620Ω. We used Bode Plot instrument in Multisim to draw the Bode plot curve and comparing it with the Bode plot on the logarithmic paper (1). Then we used the values in Table.1 to draw the Bode plot on the logarithmic paper (1). We change the input signal frequency and measure the output voltage recording the readings at Table.1. Then we used breadboard to construct the circuit setting the function generator on 500Hz, sine wave at 5VP, then measuring the output voltage with the oscilloscope. We first started looking for the suitable resistor value and we used 4.7KΩ to get critical frequency of 3.4KHz with capacitor 10nF. First, we started with the Low Pass Filter circuit on multism and then applied it on breadboard.

In bode plot the horizontal axis represents frequency on a logarithmic scale and the vertical axis represents either the amplitude or the phase of the frequency response function.The main objective of this project experiment was to design and implement passive filters (LPF, HPF, Series BPF & Series BSF) circuits. The Bode Plot is the frequency response plot of linear systems represented in the form of logarithmic plots.

Multisim bode plots