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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 | |
| 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')
| -rw-r--r-- | 3636/CH8/EX8.1/Ex8_1.sce | 9 | ||||
| -rw-r--r-- | 3636/CH8/EX8.1/Ex8_1.txt | 1 | ||||
| -rw-r--r-- | 3636/CH8/EX8.2/Ex8_2.sce | 25 | ||||
| -rw-r--r-- | 3636/CH8/EX8.2/Ex8_2.txt | 2 | ||||
| -rw-r--r-- | 3636/CH8/EX8.3/Ex8_3.sce | 12 | ||||
| -rw-r--r-- | 3636/CH8/EX8.3/Ex8_3.txt | 1 | ||||
| -rw-r--r-- | 3636/CH8/EX8.4/Ex8_4.sce | 14 | ||||
| -rw-r--r-- | 3636/CH8/EX8.4/Ex8_4.txt | 2 | ||||
| -rw-r--r-- | 3636/CH8/EX8.5/Ex8_5.sce | 24 | ||||
| -rw-r--r-- | 3636/CH8/EX8.5/Ex8_5.txt | 2 | ||||
| -rw-r--r-- | 3636/CH8/EX8.7/Ex8_7.sce | 11 | ||||
| -rw-r--r-- | 3636/CH8/EX8.7/Ex8_7.txt | 1 |
12 files changed, 104 insertions, 0 deletions
diff --git a/3636/CH8/EX8.1/Ex8_1.sce b/3636/CH8/EX8.1/Ex8_1.sce new file mode 100644 index 000000000..9f485a2dc --- /dev/null +++ b/3636/CH8/EX8.1/Ex8_1.sce @@ -0,0 +1,9 @@ +clc;
+clear;
+iC=21 //collector current in mA
+iE=21.4 //Emitter current in mA
+
+//Calculation
+alpha=iC/iE
+
+mprintf("common-base current gain= %1.2f",alpha)
diff --git a/3636/CH8/EX8.1/Ex8_1.txt b/3636/CH8/EX8.1/Ex8_1.txt new file mode 100644 index 000000000..5ed9814bf --- /dev/null +++ b/3636/CH8/EX8.1/Ex8_1.txt @@ -0,0 +1 @@ + common-base current gain= 0.98
\ No newline at end of file diff --git a/3636/CH8/EX8.2/Ex8_2.sce b/3636/CH8/EX8.2/Ex8_2.sce new file mode 100644 index 000000000..d2c630d75 --- /dev/null +++ b/3636/CH8/EX8.2/Ex8_2.sce @@ -0,0 +1,25 @@ +clc;
+clear;
+ni=1.5*10^10 //in cm^3
+Na=5*10^16 //in cm^3
+Nd=5*10^18 //in cm^3
+VBE=0.6 //in V
+WB=3*10^-4 //in cm
+Const=0.026 //constant for kT/e in V
+
+//Calculation
+//a)
+np0=ni^2/Na //in cm^-3
+deln_x=(np0/WB)*(((exp(VBE/Const)-1)*(2/3*WB))-WB/3)
+
+//b)
+deln_x1=(np0/WB)*(exp(VBE/Const)-1)*WB
+
+mprintf("Excess minority carrier concentration at x=WB/3 = %1.2e cm^-3\n",deln_x) //The answers vary due to round off error
+mprintf("Excess minority carrier concentration at x=0 = %1.2e cm^-3\n",deln_x1) //The answers vary due to round off error
+
+
+
+
+
+
diff --git a/3636/CH8/EX8.2/Ex8_2.txt b/3636/CH8/EX8.2/Ex8_2.txt new file mode 100644 index 000000000..a1bc0123b --- /dev/null +++ b/3636/CH8/EX8.2/Ex8_2.txt @@ -0,0 +1,2 @@ + Excess minority carrier concentration at x=WB/3 = 3.16e+13 cm^-3
+Excess minority carrier concentration at x=0 = 4.74e+13 cm^-3
\ No newline at end of file diff --git a/3636/CH8/EX8.3/Ex8_3.sce b/3636/CH8/EX8.3/Ex8_3.sce new file mode 100644 index 000000000..66d1f929b --- /dev/null +++ b/3636/CH8/EX8.3/Ex8_3.sce @@ -0,0 +1,12 @@ +clc;
+clear;
+alpha_F=0.98
+alpha_R=0.18
+IC=2 //current in mA
+IB=0.06 //current in mA
+Const=0.026 //constant for kT/e in V
+
+//Calculation
+VCE=Const*log((((IC*(1-alpha_R))+IB)/((alpha_F*IB)-((1-alpha_F)*IC)))*(alpha_F/alpha_R))
+
+mprintf("Collector-emitter voltage at saturation= %1.2f V",VCE)
diff --git a/3636/CH8/EX8.3/Ex8_3.txt b/3636/CH8/EX8.3/Ex8_3.txt new file mode 100644 index 000000000..40c48cda2 --- /dev/null +++ b/3636/CH8/EX8.3/Ex8_3.txt @@ -0,0 +1 @@ + Collector-emitter voltage at saturation= 0.16 V
\ No newline at end of file diff --git a/3636/CH8/EX8.4/Ex8_4.sce b/3636/CH8/EX8.4/Ex8_4.sce new file mode 100644 index 000000000..d11789698 --- /dev/null +++ b/3636/CH8/EX8.4/Ex8_4.sce @@ -0,0 +1,14 @@ +clc;
+clear;
+RL=3 //load resistor in ohm
+hie=1*10^3 //in ohm
+hre=2*10^-4 //in mho
+hfe=25 //in mho
+hoe=15*10^-6 //in mho
+
+//Calculation
+gm=hfe/hie
+Ave=-gm*RL*10^3
+
+mprintf("Transconductannce= %0.3f mho\n",gm)
+mprintf("Voltage gain= %0.2i",Ave)
diff --git a/3636/CH8/EX8.4/Ex8_4.txt b/3636/CH8/EX8.4/Ex8_4.txt new file mode 100644 index 000000000..3d0741033 --- /dev/null +++ b/3636/CH8/EX8.4/Ex8_4.txt @@ -0,0 +1,2 @@ + Transconductannce= 0.025 mho
+Voltage gain= -75
\ No newline at end of file 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 diff --git a/3636/CH8/EX8.7/Ex8_7.sce b/3636/CH8/EX8.7/Ex8_7.sce new file mode 100644 index 000000000..acf9a8173 --- /dev/null +++ b/3636/CH8/EX8.7/Ex8_7.sce @@ -0,0 +1,11 @@ +clc;
+clear;
+Wb=0.5*10^-6 //width of base region in m
+Dp=15*10^-4 // in m^2/s
+
+//Calculation
+tau_n=Wb^2/(2*Dp) //in s
+tau_B=tau_n //in s
+fT=1/(2*%pi*tau_B)
+
+mprintf("a) upper frequency limit= %1.2e Hz",fT)
diff --git a/3636/CH8/EX8.7/Ex8_7.txt b/3636/CH8/EX8.7/Ex8_7.txt new file mode 100644 index 000000000..0874a0dca --- /dev/null +++ b/3636/CH8/EX8.7/Ex8_7.txt @@ -0,0 +1 @@ + a) upper frequency limit= 1.91e+09 Hz
\ No newline at end of file |