When I fed a signal with Vp ~ 120mV with frequency of 1.6Hz to an active second order low pass filter (cutoff freq = 5Hz) , then the resulting signal is more distorted . (used in medical acquisition)
I'm using LM318 op amp with slew rate of 17V/us (sufficient enough) .
The values of R = 6.8k , C= 4.7u . Why this distortion takes if the signal is filtered ?
Filtered :
Unfiltered :
Could anyone say the possible solution for this issue . Thanks in advance !
I'm using LM318 op amp with slew rate of 17V/us (sufficient enough) .
The values of R = 6.8k , C= 4.7u . Why this distortion takes if the signal is filtered ?
Filtered :
Unfiltered :
Could anyone say the possible solution for this issue . Thanks in advance !