is there a need for noise seems to be just about probes. in e_aux.h a function like

inline COMPLEX port_noise(const node_t& n1, const node_t& n2){
  std::fill_n(CKT_BASE::_sim->_sens, 1*CKT_BASE::_sim->_total_nodes+1, 0);
  CKT_BASE::_sim->_sens[n1.m_()] = 1;
  CKT_BASE::_sim->_sens[n2.m_()] = -1;
  CKT_BASE::_sim->_acx.fbsubt(CKT_BASE::_sim->_sens); // use Gennadys transposed fbsub
  double a = CARD_LIST::card_list.do_noise();
  return a;

could be used to probe the noise (called in and just like port_impedance is called). of course an array with sensitivity data needs to be added to SIM, also do_noise() must sum up all noise contributions like in Gennadys implementation.

imo noise simulation is a bad candidate for a plugin, as there seems to be no way to make it work without changing internals. once noise works, a plugin that implements spice command compatibility might make more sense.


gnucap/user/discussions.txt · Last modified: 2015/12/11 15:39 (external edit)
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