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10
Document Number: 73069
S11-0179-Rev. B, 07-Feb-11
Vishay Siliconix
DG401B, DG403B, DG405B
APPLICATIONS
Peak Detector
A
3
acting as a comparator provides the logic drive for
operating SW
1
. The output of A
2
is fed back to A
3
and
compared to the analog input ein. If e
in
> e
out
the output of A
3
is high keeping SW
1
closed. This allows C
1
to charge up to
the analog input voltage. When e
in
goes below e
out
A
3
goes
negative, turning SW
1
off. The system will therefore store the
most positive analog input experienced.
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see www.vishay.com/ppg?73069
.
Figure 12. Positive Peak Detector
A
2
+
–
e
out
+
–
A
3
+
–
A
1
e
in
Reset
SW
1
SW
2
R
1
C
1
DG401B
