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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3636/CH8/EX8.5 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3636/CH8/EX8.5')
| -rw-r--r-- | 3636/CH8/EX8.5/Ex8_5.sce | 24 | ||||
| -rw-r--r-- | 3636/CH8/EX8.5/Ex8_5.txt | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/3636/CH8/EX8.5/Ex8_5.sce b/3636/CH8/EX8.5/Ex8_5.sce new file mode 100644 index 000000000..92f0bad4e --- /dev/null +++ b/3636/CH8/EX8.5/Ex8_5.sce @@ -0,0 +1,24 @@ +clc;
+clear;
+IE=1.5*10^-3 //in mA
+Cje=1.2*10^-12 //in F
+Dn=25 //in cm^2/s
+WB=0.4*10^-4 //in cm
+Wdc=2.5*10^-4 //in cm
+vs=10^7 //in cm/s
+Rc=25 //in ohm
+CBC=0.15*10^-12 //in F
+CS=0.12*10^-12 //in F
+Const=0.026 //constant for kT/e in V
+
+//Calculation
+Re=Const*(1/IE) //in ohm
+tau_e=Re*Cje //emitter-base junction charging in s
+tau_b=WB^2/(2*Dn) //transit time in the base in s
+tau_d=Wdc/vs //collector depletion region transit time in s
+tau_c=Rc*(CBC+CS) //collector capacitance charging time in s
+tau_D=tau_e+tau_b+tau_d+tau_c
+fT=1/(2*%pi*(tau_D))
+
+mprintf("Total emitter-to-collector delay time= %0.2e s\n",tau_D)
+mprintf("cut-of frequency of transistor= %0.2e Hz",fT)
diff --git a/3636/CH8/EX8.5/Ex8_5.txt b/3636/CH8/EX8.5/Ex8_5.txt new file mode 100644 index 000000000..08ad14c0e --- /dev/null +++ b/3636/CH8/EX8.5/Ex8_5.txt @@ -0,0 +1,2 @@ + Total emitter-to-collector delay time= 84.6 ps
+cut-of frequency of transistor= 1.88 GHz
\ No newline at end of file |