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LMV393-S08-R Datasheet(PDF) 8 Page - Unisonic Technologies

Part # LMV393-S08-R
Description  DUAL GENERAL PURPOSE, LOW VOLAGE, COMPARATORS
PDF  11 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

LMV393-S08-R Datasheet(HTML) 8 Page - Unisonic Technologies

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LMV393
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
8 of 11
www.unisonic.com.tw
QW-R104-004,A
APPLICATION CIRCUITS(Cont.)
-
+
15k
D1
*
R1
1M
R2
100k
D2
C1
80pF
R5
1M
V+
R3
1M
R4
1M
VOUT
6μs60μs
tot1
t2
-V
+
V
+
Pulse Generator
*FOR LARGE RATIOS OF R1/R2.
D1 CAN BE OMITTED.
0
At last, we get,
14
1 ln 2
tR C
=
25
1 ln 2
tR C
=
These terms have a slight error because Vmax is not exactly equal to 2/3 VCC but is actually reduced by the diode
drop to:
max
2
()
3
CC
BE
VV
V
=−
14 1
1
2(1
)
tR C
BE
e
V
−
=
−
25 1
1
2(1
)
tR C
BE
e
V
−
=
−
And that’s the exact value we get.
14
1 ln 2(1
)
BE
tR C
V
=−
25
1 ln 2(1
)
BE
tR C
V
=−



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