OLP1

OLP2

H

1

R3

H

R2

= +

-

=

Not Recommended for New Designs

LMF100

www.ti.com

SNOSBG9B – JULY 1999 – REVISED JUNE 2015

Device Functional Modes (continued)

NUMBER

ADJUSTABLE

OF

MODE

BP

LP

HP

N

AP

NOTES

RESISTOR

S

1

*

*

*

3

No

1a

2

No

May need input buffer. Poor dynamics for high Q.

1b

*

*

*

3

No

Useful for high-frequency applications.

2

*

*

*

3

Universal State-Variable Filter. Best general-purpose

3

*

*

*

4

Yes

mode.

3a

*

*

*

*

7

Yes

As above, but also includes resistor-tuneable notch.

4

*

*

*

3

No

−2.

Gives flatter allpass response than above

5

*

*

*

4

Yes

6a

*

*

3

Yes

Single pole.

6b

2

Yes

Single pole.

6c

*

*

3

No

Single pole.

7

2

Yes

Summing integrator with adjustable time constant.

(1)

Realizable filter types (that is, lowpass) denoted by asterisks (*). Unless otherwise noted, gains of various filter outputs are inverting and

adjustable by resistor ratios.

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