Hi all
trying to figure this out, I have a circuit diagram that I have re produced in LTSpice, I have produced the frequency response graph. From this I need to work out Passband gain, break frequency, bandwidth and filter order.
here is the circuit from the book.
From this presuming I am not way off, I have got the break frequency to be just about 11KHz as this is a 3dB drop. The bandwidth is 11KHz as this is all to the left of the break frequency.
I think it would be classed as a 2nd order filter as the roll off is more than 20dB per decade and less than 40dB.
But I cant figure out how you get the Passband gain, I know how to work out the gain of an op amp, inverting and non inverting but not this and I cant seem to find a good explanation of how I do this.
The output on my graph is at 0dB, I often see this referred to as Unity gain but is this correct ? and if this is not correct how would you work out the gain for this circuit.
sorry if I have missed something glaringly obvious but I am very new to this.
Thanks for any help.
trying to figure this out, I have a circuit diagram that I have re produced in LTSpice, I have produced the frequency response graph. From this I need to work out Passband gain, break frequency, bandwidth and filter order.
here is the circuit from the book.
From this presuming I am not way off, I have got the break frequency to be just about 11KHz as this is a 3dB drop. The bandwidth is 11KHz as this is all to the left of the break frequency.
I think it would be classed as a 2nd order filter as the roll off is more than 20dB per decade and less than 40dB.
But I cant figure out how you get the Passband gain, I know how to work out the gain of an op amp, inverting and non inverting but not this and I cant seem to find a good explanation of how I do this.
The output on my graph is at 0dB, I often see this referred to as Unity gain but is this correct ? and if this is not correct how would you work out the gain for this circuit.
sorry if I have missed something glaringly obvious but I am very new to this.
Thanks for any help.
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