Please write the formal report for the this question using this solutions below a) To begin with,
Question:
Please write the formal report for the this question using this solutions below
a)
To begin with, IB is assumed to be negligible. Hence, we have
RB(Q1) = R1 + R2
R1 + R2
R1 = 72Ω
R2 = 63Ω
Therefore, RB(Q1) = 72 x 63
72 + 63
= 34.067Ω
(i) VB = R2 x VCC
R1 + R2
VB = 63 x 18
72 + 63
VB = 8.4V
We then apply Kirchhoff’s Voltage Law
VB – IB(Q1)RB(Q1) – VBE(Q1) – IB(Q1)RE(Q1) = 0
VBE(Q1) = VB – 2V
VBE(Q1) = 8.4V – 2V
VBE(Q1) = 0.7V
= 2.7 – IB(Q1)RB(Q1) – 0.7 – IB(Q1) x (1 + β) x 1A
IB(Q1) = 2.7 – 0.7
RB(Q1) + 1000(1 + β)
IB(Q1) = 2
34.067+151 x 1000
IB(Q1) = 0.1324µA
Now,
VB(Q1) = 2.7 – IB(Q1) x RB(Q1)
VB(Q1) = 2.7 – (0.1324 x 10-6) x 34.067
VB(Q1) = 2.7V
(ii) VE(Q1) = IE(Q1) x RE(Q1)
But IC(Q1) = IB(Q1) x β = 0.1324 x 10-6 x 150
IC(Q1) = 0.1986 x 10-6 A
IC(Q1) = 0.1986µA
IE(Q1) = IB(Q1) (1 + β)
= 0.1324 x 10-6 x (1 +β)
= 0.1324 x 10-6 x (1 + 150)
= 0.1999 x 10-6
= 0.2µA
Therefore, VE(Q1) = 0.2 x 10-6 x 100
VE(Q1) = 0.2mV
(iii)
IE(Q1) = IB(Q1) (1 + β)
= 0.1324 x 10-6 x (1 +β)
= 0.1324 x 10-6 x (1 + 150)
= 0.1999 x 10-6
= 0.2µA
(iv) VCC - IC(Q1)RC = VC(Q1)
18 – (0.1986 x 10-6 x 48) = VC(Q1)
VC(Q1) = 17.9999V = 18V
VC(Q1) = VB(Q2) = 18V
(v) From the solution in (iv) we can see that VC(Q1) = VB(Q2). Therefore, the value for VB(Q2) is 18V.
(vi) VB(Q2) - VBE(Q1) = VE(Q2)
VE(Q2) = 18 – 0.7
VE(Q2) = 17.3V
(vii) VE(Q2) = R3 + IE(Q2)
IE(Q2) =VE(Q2) - R3
IE(Q2) = 17.3 – 1000
IE(Q2) = 0.0173A
Also, we find out that VC(Q2) = VCC =18V.
(viii) IC(Q2) = β(Q2) x IE(Q2)
1 +β(Q2)
= 100 x 0.0173
100 + 1
= 17.128 x 10-3A
= 17.128mA
(b)
The emitter follower is omitted and the output from the collector of Q1 is capacitively coupled to the 250Ω load, RL.
Vout = -β x Ib (Rc //Rl)
Ib(Q1) = Vs
rTH
rTH = VT
Ib(Q1)
rTH = 26x10-6
0.1324 x 10-6
rTH = 196.375kΩ
Ib(Q1) = Vs
rTH
Ib(Q1) = 15 x 10-3
196375
Ib(Q1) = 7.64 x 10-8A
Vout = -150 x 7.64 x10-8 x (48 x 250)
(48 + 250)
Vout = -4.615 x 10-4
Vout = -461.5µV
Use the procedure below for the report
i. Problem Description/Formulation ii. Solution Approach and Calculations
iii. Results and Discussion
Add the simulation of it using proteus as a screenshot in the report
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Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi