*----------------------------------------------------------------------- * Filename: dm6L6.inc V2 12/10/97 * Simulator: PSpice * Device type: Power beam tetrode * Device model: 6L6 (and variants) * * Author: Duncan Munro * Date: 4/6/97 * Copyright: (C)1997-2000 Duncan Amplification * * V2 [12/10/97]: Screen current limited to prevent screen current * draw at Vs = 0. * * The following parameters are not modelled: * * (1) Heater * (2) Grid current is an approximation * * Please note that this model is provided "as is" and * no warranty is provided in respect of its suitability * for any application. * * This model is provided for educational and non-profit use. * * Email queries to postmaster@duncanamps.com * * Pins A Anode * S Screen * G Grid * K Cathode * *----------------------------------------------------------------------- .SUBCKT 6L6 A S G K * * Calculate contribution to cathode current * Eat at 0 VALUE={0.636*ATAN(V(A,K)/5)} Eme me 0 VALUE={PWR(LIMIT{V(A,K),0,2000},1.5)/1750} Emu mu 0 VALUE={PWRS(V(G,K),1-(LIMIT{-V(G,K),30,9999}-30)/2000)} Egs gs 0 VALUE={LIMIT{V(A,K)/2.5+V(S,K)*15.15+V(mu)*134,0,1E6}} Egs2 gs2 0 VALUE={PWRS(V(gs),1.5)*0.8E-6} Ecath cc 0 VALUE={LIMIT{V(gs2)*V(at),0,V(me)}} * * Calculate anode current * Ga A K VALUE={V(cc)} * * Calculate screen current * Escrn sc 0 VALUE={0.76*V(gs2)*(1.1-V(at))} Gs S K VALUE={V(sc)*LIMIT{V(S,K),0,10}/10} * * Grid current * Gg G K VALUE={PWR(LIMIT{V(G,K)+1,0,1E6},1.5)*(1.25-V(at))*650E-6} * * Capacitances * Cg1 G K 5.0p Cgs G S 5.0p Cak A K 6.5p Cg1a G A 0.6p .ENDS