LM111, LM211, LM311
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007H − SEPTEMBER 1973 − REVISED AUGUST 2003
APPLICATION INFORMATION
Figure 11 through Figure 29 show various applications for the LM111, LM211, and LM311 comparators.
V
CC+
3 kΩ
3 kΩ
V
CC+
20 kΩ
1 kΩ
Square Wave
Output
(fanout to two
Series 54 gates,
or equivalent)
BAL/
STRB
BALANCE
10 kΩ
1200 pF
20 kΩ
39 kΩ
NOTE: If offset balancing is not used,
the BALANCE and BAL/STRB
pins should be shorted together.
Figure 11. 100-kHz Free-Running Multivibrator
Figure 12. Offset Balancing
BAL/STRB
V
CC+
TTL
Strobe
2N2222
20 kΩ
Output
1 kΩ
Input
Figure 13. Strobing
NOTE: Do not connect strobe pin
directly to ground, because the
output is turned off whenever
current is pulled from the strobe
pin.
V
CC−
Figure 14. Zero-Crossing Detector
11
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