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Time (5ns/div)

Output

Input

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

-0.5

-1.0

G048

HIGH-SPEED Schmitt TRIGGER

OPA699

R

2

402

Ω

R

1

200

Ω

R

3

200

Ω

V

REF

V

OUT

V

H

V

L

+2V

-2V

V

IN

S0044-02

V

HL,HH +

R1

ø R2 ø R3

R1

V

ref )

R1

ø R2 ø R3

R2

V

OUT

(5)

OPA699M

SGLS289A – MAY 2005 – REVISED MARCH 2006

APPLICATION INFORMATION (continued)

Figure 55. 100-MHz Sinewave Rectified

Figure 56 shows a high-speed Schmitt Trigger. The output levels are precisely defined and the switching time is

Figure 56. High-Speed Schmitt Trigger

propagation delay for the OPA699 in a Schmitt Trigger configuration is 4 ns from high-to-low and 4 ns from

low-to-high.

23

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