24-12-2012, 12:43 PM
CHARACTERISTICS OF ANALOG LPF/HPF
AIM:
Write a program in C and MATLAB to obtain the frequency response of simple analog RC low pass and high pass filters. Verify the same on TMS320C6711 DSP kit, MATLAB.
TOOLS REQUIRED :
TMS 320C 6711 Kit,
Full version CCS s/w,
DSK 6711 s/w,
MATLAB s/w.
THEORY:
Filter is a frequency selective device, which allows only specified band of frequencies of a input signal and attenuate all other unwanted frequencies of input signal. Based on the frequency response of the filter, filters are classified into four types.
1. Low Pass Filter (LPF)
2. High Pass Filter (HPF)
3. Band Pass filter (BPF)
4. Band Stop Filter/Band Elimination Filter/Band Reject Filter (BSF/BEF/BRF)
Low Pass Filter
Low pass filter allows only low frequencies of input signal and attenuate all other high frequencies of input signal. A simple RC low pass filter shown below