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The circuit
in Fig.2.24
represents
a common config
uration encountered
in the analysis
and design of
transistor amplifien. Assume that the values of all
the circuit elements'_R1, R2, Rc. RE, Ucc, and U$
a) Develop
the equations
needed
to determine
the
current in each element of this circuit.
b) From these equations, devise a formula for com
pufing is in terms of the circuit element values.
Apptying
0hm's Law and Kirchhoff's
Law
in an Amptifier Circuit
2.5 Anatysjs
ofa Cncujt
Containing
DependentSources
(3) iE iE ic0.
A fourth equation iesults ftom imposing the
constraint presented
by the sedes
connection
of
Rc and the dependent
source:
(4) ic
=
BiB
We tum to Kirchhoff's voltage law in de v
ing the remaining two equalions We need to
select
two closed paths
in order to use Kirchhoffs
voltage law. Note that the voltage across the
dependent current souice is unknown, and that it
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This note was uploaded on 07/05/2010 for the course EE 100 taught by Professor Boser during the Spring '07 term at University of California, Berkeley.
 Spring '07
 Boser

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