Text: g eg per p nDapogpsqoo7odapog poesuopura frequencies to Hz and 200 KHz respectively. Use Voltage AC source for the input signal. You do not need to change any parameter from the voltage AC source.
Run the simulation and find the cutoff frequency. At the cutoff frequency, the amplitude drops by 3 dB or to 70.79% of the maximum. You can find the cutoff frequency by setting the vertical I value to -3 dB.
Measurement: For each filter, follow these steps:
1. Magnitude Plot
2. Build the filters using op-amp 741.
3. Apply a 10-volt peak-peak sinusoidal waveform (set by observation on Channel I of the oscilloscope) at the input of the filter.
4. On Channel 2 of the oscilloscope, observe the output.
5. Vary the frequency in order to find the cutoff frequency, which is the frequency at which the output voltage drops by 3 dB.
Find Vo/Vi as a ratio and in dB at 0.01, 0.1, 10, and 100. Note: [Vo / Vi] in dB is calculated using 20log(Vo / Vi) - Plot [Vo / Vi] in dB. Use a logarithmic scale for frequency.
b) Active High-Pass Filter
R = 20kΩ
C1 = 100nF
R1 = 10kΩ
741 "+ Vout ..
0.01fc
0.1fc
fc
10fc
100fc
Frequency [Vo/Vi] 20log|Vo / Vi|
