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