Sallen-Key high pass filter calculator¶

The Sallen-Key High Pass Filter topology uses a single operational amplifier and the filter performance does not depend much on the operational amplifier's GBP. Using the calculator below, the component values can be calculated and tuned in a SPICE program (e.g., Spectre, LTSPICE).

Passband Gain

Capacitance (C):

Cutoff Frequency:

Q factor (dimensionless)

Output amplitude (V_pp)

C1

—

C2

—

R1

—

R2

—

R3

—

Rf

—

Rg

—

Theory:

Theory of Sallen-Key Filter

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