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Diffstat (limited to '3745/CH1/EX1.20')
| -rw-r--r-- | 3745/CH1/EX1.20/Ex1_20.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/3745/CH1/EX1.20/Ex1_20.sce b/3745/CH1/EX1.20/Ex1_20.sce new file mode 100644 index 000000000..ac442616d --- /dev/null +++ b/3745/CH1/EX1.20/Ex1_20.sce @@ -0,0 +1,21 @@ +// Ex 20 Page 361 + +clc;clear;close; +// Given +//Ia=0.0004*(Va+40*Vg)**(3/2);// mA --eqn(1) +Va=250;//V +Vg=-3;//V +//mu=delVa/delVg +//differentiation wrt Vg eqn(1) +//(4*10**-6*3/2*(Va+40*Vg))**(1/2)*(mu+40)=0 +mu=-40;//constant +printf("Amplification factor, mu = %.f",mu) +//differentiation wrt Va eqn(1) +//delIa/delVa=(4*10**-6*3/2*(Va+40*Vg))**(1/2)*(0+40) +gm=(4*10**-6*3/2)*(Va+40*Vg)**(1/2)*(0+40)*1000;// mA/V or S +printf("\n Mutual conductance, gm = %.2f S",gm) +//differentiation wrt Ia eqn(1) keeping Vg constant +//1=(4*10**-6)*3/2*(Va+40*Vg)**(1/2)*(delVa/delIa+0) +//ra=delVa/delIa +ra=1/((4*10**-6)*3/2*(Va+40*Vg)**(1/2)) +printf("\n Plate resistance, ra = %.1f kohm",ra/1000) |