Filter Design Main Page

A–Z Index

A

• All-Pass Filter
• All-Pole Filter

B

• Bandpass Filter

• Bandwidth of a filter

• Corner Cutoff Frequency, Bandwidth and Resonance Frequency

• Bode Plot

• Interactive VCF & Bode Plot Simulator
• Interactive Bode Plot & Integrator Simulator: Visualizing 1/s System Dynamics
• Octaves in Bode Plot
• Bode Magnitude and Phase Analysis

• Butterworth Filter

• Butterworth Low-Pass Filter Online Simulator

C

• Chebyshev Filter (with Online Simulator)
• Choke Input Filter

D

• DFE Equalizer

E

• Equalizer

F

• FIR Filter
• Frequency Bands

H

• High Pass Filter
• High Pass Filer [1, -1] 
• How High-Pass and Low-Pass Filters Attenuate Signals – Real DSP Examples
• How to normalize a highly distorted filtered signal

I

• IIR Filter

K

• Kalman Filter

L

• Lower Cut-off Frequency 

• Lower & Upper Cut-off Frequencies
• Linear Equalizer
• Low Pass Filter
• LTI Filter

M

• More ...

N

• Notch Filter
• Non-Recursive Filter

O

• (Octave Frequency)
• FREQUENCY RATIOS: OCTAVES vs. DECADES (with Simulation)
• (Order of a filter)
• RLC Circuit & Damping Ratio (for filters) Simulator
• 1st and 2nd-order Filters Simulation
• 3rd and 4th-order Filters Simulation

P

• Poles and Zeros in Signal Processing
• Pole-Zero Frequency Manipulation (with Example)

Q

• (Q-Factor)
• Q Factor in Band-Pass Filter
• Filter & Q-Factor Online Simulation

R

• Raised cosine filter
• Recursive Filter

U

• Understanding the 1/(1 + x) Factor in Frequency Domain Filters

W

• What is +/- 3 dB Frequency Response
• Wiener Filter
• Why Signal Amplitude Reduces After Filtering