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3.2
FUNCTIONAL BLOCK DIAGRAM ANALYSIS
3.2.1
Main
Generator
As
each
functional
block
is
described,
refer
to the appro-
VCG
AMPLIFIER
AND CURRENT
SOURCES
priate
block diagram and,
if
necessary,
the appropriate
portions of the
schematic diagrams
at
the
rear
of
this
As shown
in
Figure
3-6,
IC2
is
connected
as
a
Summing
manual.
Amplifier to
sum
the
VCG
input current
through
R89,
the current
from
the
FREQ
DIAL
R82, and
the current
from
the
VERNIER
control
R90. 1C2
is
an
inverting
+15
Figure 3-6
— VCG
Amplifier
and
Current Sources
—15
3-6
8/73
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