Filter & Q-Factor Online Simulation

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Filter & Q-Factor Online Simulation

Unified Filter & Q-Factor Analyzer

Exploring Gain, Selectivity, ripples, and Side-Lobes

Design Relationship

Q = fc / BW

BW = -- Hz

Transfer Function Characteristic

|H(f)| ≈ 1 / √(1 + ε²C_n²)

Control Panel

Filter Type:

Center Frequency: 1000 Hz

Quality Factor (Q): 5.0

Ripple/Lobe Intensity: 0.5

Recommended Design

Multiple Feedback

Preferred for low selectivity (Q ≤ 10).

Simulation Workflow & Theory

1. Q & Bandwidth

Observe the Bandwidth calculation. As you increase Q, the Bandwidth shrinks. This is "High Selectivity."

2. Circuit Selection

Note how the Circuit Box changes when Q > 10. High-selectivity filters need State-Variable designs for stability.

3. ripples & Side Lobes

Switch to Chebyshev. You will see "side lobes" in the stopband—this is the price paid for a sharper filter edge.

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