Having problem in bandpassfilters while constructing my VI for QRS detector

[Jaini]

Hi

This is my VI with input signal.I am having some problem with bandpass filter. I have tried everything but not able to solve the problem.

Jaini

[pine]

You did not put data file Jaini-L05.lvm, can not run the VI.

[Jaini]

 i can give you some other file to run the vi, I have fs=200samples/ sec and i am keeping higher cut off fh=100Hz and fl=50 Hz  and it shows me error regarding nyquist thyrm.

[Coq_Rouge]

Read this http://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem. It may explain your problem . You will also find this topic covered in many tech notes at www.ni.com. Anyway I guess you need a bandwidth up to say 300 Hz. To get a fair signal reproduction I recommend sampling with at least 3 Khz (10 times your upper bandwidth).

[Coq_Rouge]

Sorry my adress got messed up i ment http://en.wikipedia.org/wiki/Nyquist–Shannon_sampling_theorem