( − 3 d B p o i n t ) = 1 2 π ( R 1 ∗ R 2 ∗ C 1 ∗ C 2 ) 1 2 {\displaystyle (-3dB point) = \frac{1}{2\pi}(R1*R2*C1*C2)^\frac{1}{2} }