2900
Maurrc~a
bve.
Santa Clara, CA 95051
3340
/
3345
""-""""
14081
247
8046
Voltage
~ontrohed
Oscillator,
The
CEM
3340
and
CEM
3345
tiple control voltages to
be
are completely
self
contained,
mixed
within the
device
Itself.
precis~on voltage controlled Also
included
is
provision
for
oscillators, featuring both ex-
hard
and
soft synchronization of
ponential and linear control
the
frequency,
and
an output
stapes
and
up
to
four
buffered
for
easy
adjustment
of
high
fre-
output
waveforms: triangle,
quency
tracking. Special care in
sawtooth, square,
and
pulse with
the
design ensures oscillat~on
voltage controlEatsle
pulse
width. start-up under
any
power-on
Full temperafure compensation
sequence and supply conditions.
makes
these
VCOs
extremely
Although
a
low
voltage
stable, and
eliminates
the need
process
has
been
used
to reduce
for a temperature compensation
die
slze. cost, and
Isakage
cur-
-
resistor.
The
highly accurate
rents, an on-chip
6.5 volt zener
v.
exponential
and
linear control
diode allows
the
device ta
inputs are
virtual
ground
operate off
f
15
volt supplies,
summing nodes,
allowing
mul-
as
well
as
+15,-5
volt supplies.
1
CEM
3340
Circuit
Block
and
Connection
Diagram
FREO
CMTL.
LIIIEAR
FM
IMPUTS
INPUT
INPUT
INPUT
Features
H
Large Sweep Range:
50.000:l
min.
Fully Temperature
Compensated;
No
Q8
1
Resistor Required
I
Four Output
Waveforms
Available;
No
waveform
trimming required.
.I
Summing Node Enputs
for
Frequency Control
High Exponential Scale
Accuracy
Low
Temperature Drift
Voltage Controlled Pulse
Width
Hard
and
Soft
Sync
Inputs
Linear
FM
1
Buffered, Short Circuit
Protected Outputs
+I5
Volt Supplies
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