2017-02-19 23:23:40 +0100 | received badge | ● Notable Question (source) |

2017-02-19 23:23:40 +0100 | received badge | ● Popular Question (source) |

2015-09-01 19:07:21 +0100 | asked a question | Trying to find phase and group delay of transfer functions I have several functions I would like to get the phase and group delay. In python I did the following from sympy import pi, Symbol, I , atan, im, re, simplify, collect, trigsimp, sign fr = Symbol('fr', real=True) fo = Symbol('fo', real=True) fn = Symbol('fn', real=True) f = Symbol('f',real=True) q = Symbol('q', real=True) qn = Symbol('qn', real=True) wr = 2 ## Lp1 - s domainH_lp1 = wr/(s+wr) (re_part,im_part) = H_lp1.expand(complex=True).as_real_imag() H_lp1_ph = atan(im_part/re_part) Which returns the correct answer but when I try a more complicated function such as H_lpn2 = ((s (re_part,im_part) = H_lpn2.expand(complex=True).as_real_imag() H_lpn2_ph_expanded = atan(im_part/re_part) H_lpn2_ph = simplify(H_lpn2_ph_expanded) It does not return the complete solution. Any ideas? |

2015-03-07 02:23:24 +0100 | received badge | ● Editor (source) |

2015-03-07 02:19:31 +0100 | asked a question | solve 2 equations in terms of other variables Hi, I have then I say I would like to solve the above system in terms of C and L. How do I do this? |

2015-03-06 20:47:56 +0100 | answered a question | Solve symbolically Vo/Vin This seems to work solve([(Vin-Vo)...=0],Vo) |

2015-03-06 20:23:34 +0100 | asked a question | Solve symbolically Vo/Vin Hi, My equation is (Vin-Vo)/(Rs+s where Vo,Vin are variables, Rs,RL,C,L are constants s is the complex number s=i I would like to see Vo/Vin= in a symbolic expression |

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