29 #include "siddefs-fp.h"
155 unsigned int Vddt_Vw_2;
156 const unsigned short kVddt, n_snake;
158 const unsigned short* vcr_kVg;
159 const unsigned short* vcr_n_Ids_term;
160 const unsigned short* opamp_rev;
163 Integrator(
const unsigned short* vcr_kVg,
const unsigned short* vcr_n_Ids_term,
164 const unsigned short* opamp_rev,
unsigned short kVddt,
unsigned short n_snake) :
171 vcr_n_Ids_term(vcr_n_Ids_term),
172 opamp_rev(opamp_rev) {}
174 void setVw(
unsigned short Vw) { Vddt_Vw_2 = (kVddt - Vw) * (kVddt - Vw) >> 1; }
181 #if RESID_INLINING || defined(INTEGRATOR_CPP)
187 int Integrator::solve(
int vi)
190 const unsigned int Vgst = kVddt - vx;
191 const unsigned int Vgdt = kVddt - vi;
193 const unsigned int Vgst_2 = Vgst * Vgst;
194 const unsigned int Vgdt_2 = Vgdt * Vgdt;
197 const int n_I_snake = n_snake * (int(Vgst_2 - Vgdt_2) >> 15);
201 const int kVg = (int)vcr_kVg[(Vddt_Vw_2 + (Vgdt_2 >> 1)) >> 16];
205 if (Vgs < 0) Vgs = 0;
206 assert(Vgs < (1 << 16));
208 if (Vgd < 0) Vgd = 0;
209 assert(Vgd < (1 << 16));
212 const int n_I_vcr = (int)(vcr_n_Ids_term[Vgs] - vcr_n_Ids_term[Vgd]) << 15;
215 vc += n_I_snake + n_I_vcr;
218 const int tmp = (vc >> 15) + (1 << 15);
219 assert(tmp < (1 << 16));
223 return vx - (vc >> 14);
Definition: Integrator.h:152