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Results tagged with low-pass
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user 248832
A low-pass filter lets lower frequencies through and blocks or reduces higher frequencies.
0
votes
1
answer
152
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Why does the group delay change when I use a different values for this capacitor in this low...
Here's the circuit
If C5 is 0.1F then the group delay plot is constant in the pass band:
If C5 is 470uF then for the frequencies between 1 and 3 Hz it's not constant anymore:
Why does that happen? …
- 803
0
votes
1
answer
93
views
Why does this low-pass filter only work when I attach a resistor to it?
When I put in resistor R14 (100 Ω) I get this:
But when I remove R14 I get this:
Nothing happens to the MixerOut1 wave. Why not?
- 803
0
votes
2
answers
251
views
How to pass from a double-supply filter circuit to a single supply filter circuit?
So here is the main circuit, it's a lowpass filter-4th order bessel, so 2 sallen-key low-pass circuits in cascade. I already have all the components and transfer functions figured out but i would like …
- 803
3
votes
0
answers
400
views
Which of these three op amps should I choose for my low frequency filter? [closed]
I want to design a lowpass filter-4th order Bessel, so two Sallen-Key low-pass circuits in cascade with a cutoff frequency of 200Hz. I need to choose the op amps for it.
I have these 3 op amps to cho …
- 803
1
vote
3
answers
135
views
I'm trying to modify this circuit to to operate with only one power supply and find the impa...
So here's the circuit:
And here's my attempt:
V1, R6 and R7 form a voltage divider so half of V1 voltage goes to the output of U3. C4 ac-couples the filter, blocking any dc level in the signal sourc …
- 803
0
votes
1
answer
73
views
Trying to implement a digital LPF
So I took this digital LPF from some website:
And tried implement it first in MatLab to see how it goes, here's the code used:
So for a frequency of 10 Hz I get this:
For a frequency of 1000 Hz I g …
- 803
0
votes
1
answer
151
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Trying to implement a low-pass filter with a LNA as an op-amp
I'm trying to implement a low-pass filter using this circuit configuration:
I first tried implementing in Cadence using an ideal op-amp:
At 1 MHz I already have around -2.29 dB, so it's working as i …
- 803