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# Filter characteristics

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A filter has the following characteristics:

Attenuation is 0 dB from 0 Hz to 2.5 kHz. Phase angle decreases linearly with increasing frequency above 2.5 kHz. Above 5 kHz the filter has steadily increasing attenuation.

At 10 kHz attenuation is 6 dB and at 20 kHz attenuation is 24 dB.

a. Is this a low pass, high pass, band pass or band stop filter?
b. What is the attenuation per octave between 10 kHz and 20 kHz?
c. If the filter is known to be a Butterworth filter, what is the value of its order, N?

https://brainmass.com/engineering/electrical-engineering/505240

#### Solution Preview

Hi,

a. It is a low-pass filter. It is because at lower frequencies (0Hz to 2.5kHz), there is no attenuation of the signal (0dB). Then at frequencies ...

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## Characteristics of a filter

A filter has the following characteristics: Attenuation = 3.0 dB from 0 Hz to 2 kHz.
From 2 kHz to 20 kHz attenuation increases from 3 dB to 23 dB in a straight line when plotted on axes of power in decibels (vertical axis) against log frequency ( horizontal axis).

a. Is this a low pass, high pass, band pass or band stop filter?

b. What is the attenuation per decade between 2 kHz and 20 kHz?

c. What is the attenuation at 4 kHz?

d. Is this an ideal filter or does it behave like a real filter?

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