Consider the circuit in Figure 6.18. The circuit parameters are V + = 3.3 V , V B B = 2.455 V , R B = 80 kΩ , and R C = 7 kΩ . The transistor parameters are β = 110 , V B E (on) = 0.7 V , and V A = 80 V . (a) Determine I C Q and V E C Q . (b) Find g m , r π , and r o . (c) Determine the small−signal voltage gain A υ = υ o / υ s . (d) Find the small−signal input and output resistances R i and R o , respectively. (Ans. (a) I C Q =0 .2mA , V E C Q = 1.9 V ; (b) g m = 7.692 mA/V , r π = 14.3 kΩ , r o = 400 kΩ ; (c) A υ = − 8.02 ; (d) R i = 94.3 kΩ , R o = 6.88 kΩ )
Consider the circuit in Figure 6.18. The circuit parameters are V + = 3.3 V , V B B = 2.455 V , R B = 80 kΩ , and R C = 7 kΩ . The transistor parameters are β = 110 , V B E (on) = 0.7 V , and V A = 80 V . (a) Determine I C Q and V E C Q . (b) Find g m , r π , and r o . (c) Determine the small−signal voltage gain A υ = υ o / υ s . (d) Find the small−signal input and output resistances R i and R o , respectively. (Ans. (a) I C Q =0 .2mA , V E C Q = 1.9 V ; (b) g m = 7.692 mA/V , r π = 14.3 kΩ , r o = 400 kΩ ; (c) A υ = − 8.02 ; (d) R i = 94.3 kΩ , R o = 6.88 kΩ )
Solution Summary: The circuit for pnp common emitter is shown in Figure 1.
Consider the circuit in Figure 6.18. The circuit parameters are
V
+
=
3.3
V
,
V
B
B
=
2.455
V
,
R
B
=
80
kΩ
, and
R
C
=
7
kΩ
. The transistor parameters are
β
=
110
,
V
B
E
(on)
=
0.7
V
, and
V
A
=
80
V
. (a) Determine
I
C
Q
and
V
E
C
Q
. (b) Find
g
m
,
r
π
, and
r
o
. (c) Determine the small−signal voltage gain
A
υ
=
υ
o
/
υ
s
. (d) Find the small−signal input and output resistances
R
i
and
R
o
, respectively. (Ans. (a)
I
C
Q
=0
.2mA
,
V
E
C
Q
=
1.9
V
; (b)
g
m
=
7.692
mA/V
,
r
π
=
14.3
kΩ
,
r
o
=
400
kΩ
; (c)
A
υ
=
−
8.02
; (d)
R
i
=
94.3
kΩ
,
R
o
=
6.88
kΩ
)
In the small-signal equivalent circuit, the DC voltage source is replaced by a open circuit.
Select one
O True
O False
The two types of free charge carriers are electrons and holes
Select one
Q6.) Identify whether the following statement are true(T) or false (F)
4- A piezo-electrical transducer is an example for active transducer.
5- The (1) is remove form control register in successive approximation DVM when
(Vin) is greater than VD (A/D convertor voltage).
6. Determine the approximate values of each of the following quantities in Figure 6.
a.
b. If
C. Vout
d. Closed loop gain
22k0
www
22 k
Figure 6
Jin
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