Datasheet

V
IN
+
-
+V
CC
R
1
1M:
V
OUT
+
-
C
1
10PF
-V
CC
LMV7271
SNOSA56H –FEBRUARY 2003–REVISED FEBRUARY 2013 www.ti.com
Figure 35. OR’ing the Outputs
NEGATIVE PEAK DETECTOR
For the negative detector, the output transistor of the comparator acts as a low impedance current sink. Since
there is no pull-up resistor, the only discharge path will be the 1MΩ resistor and any load impedance used.
Decay time is changed by varying the 1MΩ resistor.
Figure 36. Negative Peak Detector
SQUARE WAVE GENERATOR
A typical application for a comparator is as a square wave oscillator. The circuit below generates a square wave
whose period is set by the RC time constant of the capacitor C
1
and resistor R
4
. The maximum frequency is
limited by the large signal propagation delay of the comparator, and by the capacitive loading at the output,
which limits the output slew rate.
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