Fourier serise and transform and low pass filter

Fourier serise and transform

http://www.ee.bgu.ac.il/~intr2/Fourier%20transform.pdf
 http://www.eie.polyu.edu.hk/~nflaw/EIE341Sem22009/L5s.pdf
http://www.iam.ubc.ca/~sospedra/11-dft.pdf
http://www.scribd.com/doc/92047229/DSP-2-DFS-DFT-S
http://www.jhu.edu/signals/dtfsproperties2/indexdtfsprops2.htm
http://www2.ensc.sfu.ca/people/faculty/ho/ENSC380/Lecture13.pdf
http://www2.ensc.sfu.ca/people/faculty/atousa/personal/TEACHING/380/MATERIAL/COURSE/Lecture13-complete.pdf
http://www.iam.ubc.ca/~sospedra/08-fs.pdf
http://www.iam.ubc.ca/~sospedra/08-fs.pdf
http://www.scribd.com/doc/92047229/DSP-2-DFS-DFT-S
http://www.jhu.edu/signals/dtfsproperties2/indexdtfsprops2.htm


Filter
http://www.electronics-tutorials.ws/filter/filter_2.html
http://www.learnabout-electronics.org/ac_theory/filters82.php
http://en.wikipedia.org/wiki/Low-pass_filter
http://www.scribd.com/doc/92047229/DSP-2-DFS-DFT-S
http://diytechno.blogspot.com/2012/05/woofer-filter-low-pass-filter-bass.html
http://mini.physics.sunysb.edu/~xudu/files/skUnit2.pdf
http://bmia.bmt.tue.nl/people/BRomeny/Courses/8C120/pdf/RC-circuit.pdf