note : CL stability is gauged by looking at gain & ph margins defined for OL tx func for CL tx func def : 3:00 a) cutoff freq (wc) : w at which mag of CL freq resp TX func is 3dB below its 0 freq value i.e. LF assym value b) BW : freq range 0 < w < wc is BW of syst c) cutoff rate : slope of log - magnitude curve at cutoff freq 8:30 Note : higher BW => faster resp => lower rise time. As faster resp is desirable, higher BW is prefered Performance param in : 11:30 In freq domain : gain & ph margin, BW, cutoff freq and rate, resonant peak etc. In time domain : settling time, rise time, peak overshoot, peak time etc. note : pole zero cancellation doen't ensure stability becoz of possible parametric variations in original func itself