019_5th_order_lp_filter : 5th order LP Filter variations
Requires: SmartSpice & Smartview
Minimum Versions: SMARTSPICE 4.6.5.R
The circuit input deck is a 5th-order Lowpass filter containing pole zero analysis (.PZ). Rubberband r*[res], c*[cap] and l*ind] parameters to see changes in the resonant poles of the circuit.
Input Files
rubberband_example_19.in
* 5th-order lowpass filter ** * ** in 0 1 1.00 ac 1 r1 1 0 1.0 c3 1 0 1.52 c4 2 0 1.50 c5 3 0 0.83 c1 1 2 0.93 l1 1 2 0.65 c2 2 3 3.80 l2 2 3 1.00 r2 3 0 1.00 * .PZ 3 0 1 0 cur PZ .OPTIONS + nomod + COEF2 = 1.E-9 ; abstol *+ COEF3 = 1.E-9 ; reltol *+ BYPASS = 1 ************************************** * pole(1) = -5.4509e-01, 0.0000e+00 * pole(2) = -1.1827e-01, 8.9149e-01 * pole(3) = -1.1827e-01,-8.9149e-01 * pole(4) = -6.9485e-02, 4.6718e-01 * pole(5) = -6.9485e-02,-4.6718e-01 * zero(1) = 0.0000e+00, 5.1299e-01 * zero(2) = 0.0000e+00,-5.1299e-01 * zero(3) = 0.0000e+00, 1.2862e+00 * zero(4) = 0.0000e+00,-1.2862e+00 ************************************** .END
Graphics