Principles of Analog Electronics

Ampliers: Cascading Stages

519

EXERCISE 3

Consider the double C.E.-swamped C.E. conguration as represented in

Figure 14.23. The parameters

h

re

and

h

oe

of both BJTs are negligible.

Determine the expressions of the following:

• The input resistances of both stages and the overall input resistance

• The voltage gains of both stages and the overall voltage gain

EXERCISE 4

Consider the double C.S.–C.S. conguration as represented in Figure 14.24.

Determine the expressions of the following:

• The overall input resistance

•

T

he overall voltage gain

•

T

he overall output resistance

R

g

+

R

2,I

R

2,II

R

1,I

R

1,II

R

C,I

R

C,II

R

E,I

R

E1,II

R

E2,II

V

CC

C

B1

C

E,I

C

E,II

C

B2

C

B3

v

g

FIGUR ...