$Q$ factor refers to what on a lowpass filter? (EE kind of definition)

1. What is Q in low-pass filter?
2. What is the Q factor of a filter?
3. What does Q mean in filters?
4. What is Q value in DSP?

What is Q in low-pass filter?

The Q or quality factor of a filter describes the selectivity of the circuit. For a 2nd-order band-pass filter it defines the bandwidth to the center frequency, Q = B/fc and the higher the bandwidth the more selective is the filter. The center frequency of an active filter is tuneable and therefore its Q-factor.

What is the Q factor of a filter?

In short, Q factor is expressed as the ratio of stored versus lost energy per oscillation cycle. More specifically, Q factor generally describes specifications such as the steepness of skirts, or the selectivity, and how low the insertion loss is.

What does Q mean in filters?

The factor is known as Q (quality factor). The higher the Q, the better the filter; the lower the losses, the closer the filter is to being perfect.

What is Q value in DSP?

The “Q” control affects the bandwidth of a boost or cut. A small Q factor results in an effect on a wide frequency range, while a high Q factor allows to eliminate narrow-band flaws in the frequency response. The Q factor can be varied from 0.5 to 15 in 0.1 steps.