
220
current-supplying source and is not always convenient. The only
other one that perhaps deserves showing now is outlined in Fig. 13.7.
The object of connecting R
B
to the collector instead of as in Fig. 13.4
is to compensate in a simpler way for changes in I
c
. If
7
c
is
too large,
IN
C
B
—
II
V
CCE
II
1
"1
^ τ
ουτ
Fig. 13.6 This base-biasing scheme is
more stable than the one shown in Fig.
13.4 and is usually preferred
Fig. 13.7 This base-biasing circuit is
much simpler than Fig. 13.6 and does
have stabilising action, but owning to
certain disadvantages is less used
it increases the voltage drop in R
L
and so reduces the voltage applied
to R
B