bodeplot.92g



In the world of electrical engineering transfer functions are used to help

describe how a circuts behave.  Transfer functions are related as a ratio

of polynomials in terms of s. ie   N(s)        20(s+2)

                                  -----  =  -----------

                                   D(s)     s(s+6)(s+1)



 Where s = j*w.  (For E.E.'s  j = i (the imaginary representation for

squareroot(-1) ) and w = omega = 2*Pi*frenquency.)  Transfer functions are

then plotted on a semi-log scale as frenquency vs. magnitude in dB  and

frenquency vs. phase in degrees. This program produces these graphs on a

semi-log scale and provides the information that describes the

plot.  Equations entered in this program must be in terms of s !!

Also be aware that this program will overwrite the functions y1(x)

through yn(x) depending on the complexity of the transfer function

to be plotted Included with this group is a function called RptRoot.

RptRoot finds all of the zeros of a polynomial, Including the repeated

zeros.  Arguments are passed to RptRoot the same as they are passed for

cZeros.   RptRoot(expression,var)



Please send Questions and Comments to:

Clif Burnes

gt0370b@prism.gatech.edu