אופנתי הצפה להיות מופתע second order rc filter פסיכולוגיה ליישם לקרוא
First Order and Second Order Passive Low Pass Filter Circuits
transfer function - 2nd order passive low pass filter cutoff frequency with additional paralel resistor before the second capacitor - Electrical Engineering Stack Exchange
Butterworth Filter: First Order and Second Order Low Pass Butterworth Filter