00:01
So, the question is to use iterative analysis to determine the diode current where vdd is 1 volt, r is 1 kilo -oom, and is is 10 -10 to minus 15 ampere and the circuit is given here.
00:11
Okay, so we can start by assuming that the voltage across the diode is, let's say, 0 .7 volts because that is the general value that we have for voltage drop across a diode.
00:28
So we'll rate this as vds .7.
00:31
Now we'll use our iterative method.
00:34
So now we know vd, so we can calculate current id.
00:38
So id will be change in voltage divided by resistance.
00:42
So here we have change in voltage that is vdd minus vd over resistance r.
00:50
Now vdd given to us is 1 volt minus 0 .7 divided by 1000 gives 0 .7.
01:00
3mm .mere.
01:04
Okay, so we know the current now for this given value but we don't know if this is correct or not.
01:09
So we have to check what is the vd based on the equation of voltage across the diode.
01:18
So we have vd is equals to vt times ln of id over is.
01:29
Now here vt is the voltage dependent on the temperature.
01:33
And the saturation values, so that is for normal diode or for this given diode is 0 .025 times ln of id we have calculated 0 .3 milliampiers, which is nothing but 0 .3 into 10 to minus 3 ampers divided i .s given to us as 10 to minus 15.
01:57
On calculating this, we get 0 .6607.
02:02
So from this we get vda 0 .6 in here with 0 .7s.
02:07
So now we have one step closer to the actual value.
02:12
So now we can again use the same procedure...