Electronics - Basic Op-Amp Circuits - Discussion
Discussion Forum : Basic Op-Amp Circuits - General Questions (Q.No. 13)
13.
A two-pole high-pass active filter would have a roll-off rate of
Discussion:
19 comments Page 1 of 2.
Neelavathi said:
10 years ago
What is roll-off rate?
(1)
Meganathan said:
1 decade ago
Dudes your totally opposite because two pole high pass filter would have a roll-off rate is -40db/decade. Single pole high pass filter would have a roll-off rate is -20db/decade. In case of low pass filter means totally opposite.
Roxy said:
4 years ago
It should be +40db/decade since the slope of the curve for a high pass filter is increasing and not decreasing.
-40db/decade should be for a second-order (two-pole) low pass filter.
-40db/decade should be for a second-order (two-pole) low pass filter.
Ramotar said:
7 years ago
Not understanding, please explain me to get it.
Rushikesh said:
9 years ago
Yeah, it should be +40 dB per decade as because it is high pass filter the gain will increase as frequency Will increase.
Nagaraju said:
1 decade ago
Reduced 40db/decay = -40db/decay.
Kartik said:
1 decade ago
Yes it will be -40db/decade.
High pass active filter will allow to pass a high frequency and block low frequency it will decade a low frequency i.e. -40.
High pass active filter will allow to pass a high frequency and block low frequency it will decade a low frequency i.e. -40.
Sengar said:
1 decade ago
I think it should be +40, because we are considering only starting transition.
Asad Ali said:
1 decade ago
Friends in question it is clear that the roll off frequency is asked. If you plot a graph of H.P.F than you will see that High pass filter has range in which there is a starting transition and ending transition. On starting transition it is +40db/dec and on ending transition it is -40db/dec.
Dilip said:
1 decade ago
Low pass filters have positive roll off.
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