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Theory of
Operation
-
4g4A/494Ap
Service,
Vol.
1
PHASE/FREO
DETECTOR
fr:t,orF:NF,
Figure
7-28.
Block
diagram
of a baslc
syntheelzer.
Phase/Freq
DETECTOR
mOD
CONTROL
F,n
:
(NP
+
A)
Frct
o
a
t
o
I
o
o
o
o
o
t
o
o
o
o
o
o
o
o
I
o
o
o
a
o
o
o
o
o
a
C
a
o
a
o
I
o
a
o
O
o
a
o
O
Figure
7-29.
Basic
block
diagram
of
a
+N
syntheeizer with
a variable modulue
prescaler.