blob: ecf781d47369938a351fe8ae30bdc59af24edee0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
clear;
clc;
//Caption:amplifier using n channel FET
//Given Data
Vp=-2;//in V
Idss=1.65;//in mA
//it is desired to bias the circut at Id=0.8mA
Ids=0.8;//in mA
Vdd=24;//in V
//Assumption: rd>Rd
Vgs=Vp*(1-(Ids/Idss)^0.5);//in V
gmo=-(2*Idss/Vp);
gm=gmo*(1-(Vgs/Vp));
Rs=-(Vgs/Ids);//in ohm
disp('20dB corresponds to voltage gain of i0');
Av=10;
Rd=Av/gm;//in ohm
disp('ohm',Rd,'Rd=');
//end
|
