LM111, LM211, LM311

DIFFERENTIAL COMPARATORS WITH STROBES

SLCS007H – SEPTEMBER 1973 – REVISED AUGUST 2003

11

POST OFFICE BOX 655303

APPLICATION INFORMATION

Figure 11 through Figure 29 show various applications for the LM111, LM211, and LM311 comparators.

Figure 11. 100-kHz Free-Running Multivibrator

VCC+

39 k

Ω

1200 pF

20 k

Ω

1 k

Ω

10 k

Ω

20 k

Ω

Square Wave

Output

(fanout to two

Series 54 gates,

or equivalent)

NOTE: If offset balancing is not used,

the BALANCE and BAL/STRB

pins should be shorted together.

Figure 12. Offset Balancing

3 k

Ω

3 k

Ω

VCC+

BALANCE

BAL/

STRB

Figure 13. Strobing

1 k

Ω

BAL/STRB

TTL

Strobe

2N2222

NOTE: Do not connect strobe pin

directly to ground, because the

output is turned off whenever

current is pulled from the strobe

pin.

Figure 14. Zero-Crossing Detector

VCC+

Input

VCC–

20 k

Ω

Output