Question

list the 5 parameters of a filter and how they are calculated

Answer #1

Filters usually allow only certain frequencies through it.

Filters classified into following categories

1. Low pass filter

2. High pass filter

3. Band pass filter

4. Band stop filter

Parameters of the filters are:

1. Gain:

Gain = Output response/input response= Vo(s)/Vin(s)

2. Bandwidth

It is defined as the range of frequencies that are allowed by filter

Bandwidth = f_{high}-f_{low}

Where f_{high} is higher cutoff frequency

f_{low} is lower cutoff frequency

3. Cuttoff frequency

It is the frequency at which ratio of output to the input is 0.707

4. Quality factor

It is a measure of goodness of the circuit.

Quality factor(Q) = Resonant frequency / bandwidth

5. Stability

Stability can be determined by finding poles of the system.

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