Differential Low Pass Filter

Equal series resistors in both signal legs, with one capacitor across the differential pair. Uses total differential resistance: R_d = 2R.

Differential Low Pass Filter
\(f_c = \frac{1}{2 * 3.14159 * R_{sum} *C_{d}}\)

Instructions: Select the variable you want to solve for, and fill in the others.

Solve Symbol Input Value Unit Description
\(R_{sum}\)
\(\Omega\) Total differential series resistance, R_1 + R_2. For equal leg resistors, R_sum = 2R.
\(C_{d}\)
\(F\) Differential capacitor connected across the signal pair.
\(f_{c}\)
\(Hz\) Differential-mode low-pass cutoff frequency.

References