bjtdset.c

spice中支持多层次元件模型仿真的可单独运行的插件源码

DivDeriv(&d_ic, &d_dummy, &d_qb);


d_ic.value -= cbc/here->BJTtBetaR + cbcn;
d_ic.d1_q -= gbc/here->BJTtBetaR + gbcn;
d_ic.d2_q2 -= gbc2/here->BJTtBetaR + gbcn2;
d_ic.d3_q3 -= gbc3/here->BJTtBetaR + gbcn3;

/* check this point: where is the f2(vbe) contribution to ic ? */

	/* ic derivatives all set up now */
	    /* base spread resistance */

	if ( !((rbpr == 0.0) && (rbpi == 0.0)))
	{
            cb=cbe/here->BJTtBetaF+cben+cbc/here->BJTtBetaR+cbcn;
	    /* we are calculating derivatives w.r.t cb itself */
	    /*
            gx=rbpr+rbpi/qb;
	    */

	    if (cb != 0.0) {
            if((xjrb != 0.0) && (rbpi != 0.0)) {
		/* p = ib, q, r = anything */
                dummy=MAX(cb/xjrb,1e-9);
		EqualDeriv(&d_dummy, &d_p);
		d_dummy.value = dummy;
		d_dummy.d1_p = 1/xjrb;
		SqrtDeriv(&d_dummy, &d_dummy);
		TimesDeriv(&d_dummy, &d_dummy, 2.4317); 

		/*
		dummy2=(-1+sqrt(1+14.59025*MAX(cb/xjrb,1e-9)));
		*/
		EqualDeriv(&d_dummy2, &d_p);
		d_dummy2.value = 1+14.59025*MAX(cb/xjrb,1e-9);
		d_dummy2.d1_p = 14.59025/xjrb;
		SqrtDeriv(&d_dummy2, &d_dummy2);
		d_dummy2.value -= 1.0;

		DivDeriv(&d_z, &d_dummy2, &d_dummy);
		TanDeriv(&d_tanz, &d_z);

		/*now using dummy = tanz - z and dummy2 = z*tanz*tanz */
		TimesDeriv(&d_dummy, &d_z, -1.0);
		PlusDeriv(&d_dummy, &d_dummy, &d_tanz);

		MultDeriv(&d_dummy2, &d_tanz, &d_tanz);
		MultDeriv(&d_dummy2, &d_dummy2, &d_z);

		DivDeriv(&d_rbb , &d_dummy, &d_dummy2);
		TimesDeriv(&d_rbb,&d_rbb, 3.0*rbpi);
		d_rbb.value += rbpr;

		MultDeriv(&d_vbb, &d_rbb, &d_p);

	/* power series inversion to get the conductance derivatives */

	if (d_vbb.d1_p != 0) {
		gbb1 = 1/d_vbb.d1_p;
		gbb2 = -(d_vbb.d2_p2*0.5)*gbb1*gbb1;
		gbb3 = gbb1*gbb1*gbb1*gbb1*(-(d_vbb.d3_p3/6.0)
			+ 2*(d_vbb.d2_p2*0.5)*(d_vbb.d2_p2*0.5)*gbb1);
		}
		else
		printf("\nd_vbb.d1_p = 0 in base spread resistance calculations\n");


/* r = vbb */
EqualDeriv(&d_ibb, &d_r);
d_ibb.value = cb;
d_ibb.d1_r = gbb1;
d_ibb.d2_r2 = 2*gbb2;
d_ibb.d3_r3 = 6.0*gbb3;
            }
	    else
	    {
	     /*
	     rbb = rbpr + rbpi/qb;
	     ibb = vbb /rbb; = f(vbe, vbc, vbb)
	     */

	     EqualDeriv(&d_rbb,&d_p);
	     d_rbb.d1_p = 0.0;
	     if (rbpi != 0.0) {
	     InvDeriv(&d_rbb, &d_qb);
	     TimesDeriv(&d_rbb, &d_rbb,rbpi);
	     }
	     d_rbb.value += rbpr;

	     EqualDeriv(&d_ibb,&d_r);
	     d_ibb.value = vbb;
	     DivDeriv(&d_ibb,&d_ibb,&d_rbb);

	    }
	    }
	    else
	    {
	    EqualDeriv(&d_ibb,&d_r);
	    if (rbpr != 0.0)
	    	d_ibb.d1_r = 1/rbpr;
	    }
	    }
	    else
	    {
	    EqualDeriv(&d_ibb,&d_p);
	    d_ibb.d1_p = 0.0;
	    }

	/* formulae for base spread resistance over! */

	    /* ib term */

	    EqualDeriv(&d_ib, &d_p);
	    d_ib.d1_p = 0.0;
	    d_ib.value = cb;
	    d_ib.d1_p = gbe/here->BJTtBetaF + gben;
	    d_ib.d2_p2 = gbe2/here->BJTtBetaF + gben2;
	    d_ib.d3_p3 = gbe3/here->BJTtBetaF + gben3;

	    d_ib.d1_q = gbc/here->BJTtBetaR + gbcn;
	    d_ib.d2_q2 = gbc2/here->BJTtBetaR + gbcn2;
	    d_ib.d3_q3 = gbc3/here->BJTtBetaR + gbcn3;

	    /* ib term over */
                /*
                 *   charge storage elements
                 */
                tf=model->BJTtransitTimeF;
                tr=model->BJTtransitTimeR;
                czbe=here->BJTtBEcap*here->BJTarea;
                pe=here->BJTtBEpot;
                xme=model->BJTjunctionExpBE;
                cdis=model->BJTbaseFractionBCcap;
                ctot=here->BJTtBCcap*here->BJTarea;
                czbc=ctot*cdis;
                czbx=ctot-czbc;
                pc=here->BJTtBCpot;
                xmc=model->BJTjunctionExpBC;
                fcpe=here->BJTtDepCap;
                czcs=model->BJTcapCS*here->BJTarea;
                ps=model->BJTpotentialSubstrate;
                xms=model->BJTexponentialSubstrate;
                xtf=model->BJTtransitTimeBiasCoeffF;
                ovtf=model->BJTtransitTimeVBCFactor;
                xjtf=model->BJTtransitTimeHighCurrentF*here->BJTarea;
                if(tf != 0 && vbe >0) {
		    EqualDeriv(&d_cbe, &d_p);
		    d_cbe.value = cbe;
		    d_cbe.d1_p = gbe;
		    d_cbe.d2_p2 = gbe2;
		    d_cbe.d3_p3 = gbe3;
                    if(xtf != 0){
                        if(ovtf != 0) {
			/* dummy = exp ( vbc*ovtf) */
			EqualDeriv(&d_dummy, &d_q);
			d_dummy.value = vbc*ovtf;
			d_dummy.d1_q = ovtf;
			ExpDeriv(&d_dummy, &d_dummy);
                        }
			else
			{
			EqualDeriv(&d_dummy,&d_p);
			d_dummy.value = 1.0;
			d_dummy.d1_p = 0.0;
			}
                        if(xjtf != 0) {
			    EqualDeriv(&d_dummy2, &d_cbe);
			    d_dummy2.value += xjtf;
			    DivDeriv(&d_dummy2, &d_cbe, &d_dummy2);
			    MultDeriv (&d_dummy2, &d_dummy2, &d_dummy2);
			    }
			    else
			    {
			    EqualDeriv(&d_dummy2,&d_p);
			    d_dummy2.value = 1.0;
			    d_dummy2.d1_p = 0.0;
			    }
			
			MultDeriv(&d_tff, &d_dummy, &d_dummy2);
			TimesDeriv(&d_tff, &d_tff, tf*xtf);
			d_tff.value += tf;
			}
			else
			{
			EqualDeriv(&d_tff,&d_p);
			d_tff.value = tf;
			d_tff.d1_p = 0.0;
			}




			    /* qbe = tff/qb*cbe */

/*
	dummy = tff/qb;
	*/
			/* these are the cbe coeffs */
DivDeriv(&d_dummy, &d_tff, &d_qb);
MultDeriv(&d_qbe, &d_dummy, &d_cbe);

                        }
			else
			{
			EqualDeriv(&d_qbe, &d_p);
			d_qbe.value = 0.0;
			d_qbe.d1_p = 0.0;
			}
                if (vbe < fcpe) {
                    arg=1-vbe/pe;
                    sarg=exp(-xme*log(arg));
		    lcapbe1 = czbe*sarg;
		    lcapbe2 =
		    0.5*czbe*xme*sarg/(arg*pe);
		    lcapbe3 =
		    czbe*xme*(xme+1)*sarg/(arg*arg*pe*pe*6);
		} else {
                    f1=here->BJTtf1;
                    f2=model->BJTf2;
                    f3=model->BJTf3;
                    czbef2=czbe/f2;
                    lcapbe1 = czbef2*(f3+xme*vbe/pe);
		    lcapbe2 = 0.5*xme*czbef2/pe;
		    lcapbe3 = 0.0;
                }
		d_qbe.d1_p += lcapbe1;
		d_qbe.d2_p2 += lcapbe2*2.;
		d_qbe.d3_p3 += lcapbe3*6.;


                fcpc=here->BJTtf4;
                f1=here->BJTtf5;
                f2=model->BJTf6;
                f3=model->BJTf7;
                if (vbc < fcpc) {
                    arg=1-vbc/pc;
                    sarg=exp(-xmc*log(arg));
		    lcapbc1 = czbc*sarg;
		    lcapbc2 =
		    0.5*czbc*xmc*sarg/(arg*pc);
		    lcapbc3 =
		    czbc*xmc*(xmc+1)*sarg/(arg*arg*pc*pc*6);
                } else {
                    czbcf2=czbc/f2;
                    lcapbc1 = czbcf2*(f3+xmc*vbc/pc);
		    lcapbc2 = 0.5*xmc*czbcf2/pc;
		    lcapbc3 = 0;
                }
                if(vbx < fcpc) {
                    arg=1-vbx/pc;
                    sarg=exp(-xmc*log(arg));
                    lcapbx1 = czbx*sarg;
		    lcapbx2 =
		    0.5*czbx*xmc*sarg/(arg*pc);
		    lcapbx3 =
		    czbx*xmc*(xmc+1)*sarg/(arg*arg*pc*pc*6);
                } else {
                    czbxf2=czbx/f2;
                    lcapbx1 = czbxf2*(f3+xmc*vbx/pc);
		    lcapbx2 = 0.5*xmc*czbxf2/pc;
		    lcapbx3 = 0;
                }
                if(vsc < 0){
                    arg=1-vsc/ps;
                    sarg=exp(-xms*log(arg));
		    lcapsc1 = czcs*sarg;
		    lcapsc2 =
		    0.5*czcs*xms*sarg/(arg*ps);
		    lcapsc3 =
		    czcs*xms*(xms+1)*sarg/(arg*arg*ps*ps*6);
                } else {
                    lcapsc1 = czcs*(1+xms*vsc/ps);
		    lcapsc2 = czcs*0.5*xms/ps;
		    lcapsc3 = 0;
                }

                /*
                 *   store small-signal parameters
                 */
here->ic_x = d_ic.d1_p;
here->ic_y = d_ic.d1_q;
here->ic_xd = d_ic.d1_r;
here->ic_x2 = 0.5*model->BJTtype*d_ic.d2_p2;
here->ic_y2 = 0.5*model->BJTtype*d_ic.d2_q2;
here->ic_w2 = 0.5*model->BJTtype*d_ic.d2_r2;
here->ic_xy = model->BJTtype*d_ic.d2_pq;
here->ic_yw = model->BJTtype*d_ic.d2_qr;
here->ic_xw = model->BJTtype*d_ic.d2_pr;
here->ic_x3 = d_ic.d3_p3/6.;
here->ic_y3 = d_ic.d3_q3/6.;
here->ic_w3 = d_ic.d3_r3/6.;
here->ic_x2w = 0.5*d_ic.d3_p2r;
here->ic_x2y = 0.5*d_ic.d3_p2q;
here->ic_y2w = 0.5*d_ic.d3_q2r;
here->ic_xy2 = 0.5*d_ic.d3_pq2;
here->ic_xw2 = 0.5*d_ic.d3_pr2;
here->ic_yw2 = 0.5*d_ic.d3_qr2;
here->ic_xyw = d_ic.d3_pqr;

here->ib_x = d_ib.d1_p;
here->ib_y = d_ib.d1_q;
here->ib_x2 = 0.5*model->BJTtype*d_ib.d2_p2;
here->ib_y2 = 0.5*model->BJTtype*d_ib.d2_q2;
here->ib_xy = model->BJTtype*d_ib.d2_pq;
here->ib_x3 = d_ib.d3_p3/6.;
here->ib_y3 = d_ib.d3_q3/6.;
here->ib_x2y = 0.5*d_ib.d3_p2q;
here->ib_xy2 = 0.5*d_ib.d3_pq2;

here->ibb_x = d_ibb.d1_p;
here->ibb_y = d_ibb.d1_q;
here->ibb_z = d_ibb.d1_r;
here->ibb_x2 = 0.5*model->BJTtype*d_ibb.d2_p2;
here->ibb_y2 = 0.5*model->BJTtype*d_ibb.d2_q2;
here->ibb_z2 = 0.5*model->BJTtype*d_ibb.d2_r2;
here->ibb_xy = model->BJTtype*d_ibb.d2_pq;
here->ibb_yz = model->BJTtype*d_ibb.d2_qr;
here->ibb_xz = model->BJTtype*d_ibb.d2_pr;
here->ibb_x3 = d_ibb.d3_p3/6.;
here->ibb_y3 = d_ibb.d3_q3/6.;
here->ibb_z3 = d_ibb.d3_r3/6.;
here->ibb_x2z = 0.5*d_ibb.d3_p2r;
here->ibb_x2y = 0.5*d_ibb.d3_p2q;
here->ibb_y2z = 0.5*d_ibb.d3_q2r;
here->ibb_xy2 = 0.5*d_ibb.d3_pq2;
here->ibb_xz2 = 0.5*d_ibb.d3_pr2;
here->ibb_yz2 = 0.5*d_ibb.d3_qr2;
here->ibb_xyz = d_ibb.d3_pqr;

here->qbe_x = d_qbe.d1_p;
here->qbe_y = d_qbe.d1_q;
here->qbe_x2 = 0.5*model->BJTtype*d_qbe.d2_p2;
here->qbe_y2 = 0.5*model->BJTtype*d_qbe.d2_q2;
here->qbe_xy = model->BJTtype*d_qbe.d2_pq;
here->qbe_x3 = d_qbe.d3_p3/6.;
here->qbe_y3 = d_qbe.d3_q3/6.;
here->qbe_x2y = 0.5*d_qbe.d3_p2q;
here->qbe_xy2 = 0.5*d_qbe.d3_pq2;

here->capbc1 = lcapbc1;
here->capbc2 = lcapbc2;
here->capbc3 = lcapbc3;

here->capbx1 = lcapbx1;
here->capbx2 = lcapbx2;
here->capbx3 = lcapbx3;

here->capsc1 = lcapsc1;
here->capsc2 = lcapsc2;
here->capsc3 = lcapsc3;
		 }
		 }
		 return(OK);
		 }