A crankcase breather for an internal combustion engine has a housing including inlet ports which receive crankcase emissions from the engine, and an outlet port which directs oil-free gases back to the engine. The method includes controlling capacitances between different nodes of the string to effectively tune the string capacitively, which will reduce the variance in the RF switch voltage distributed across each constituent FET, thereby enhancing switch breakdown voltage. The adjusted boost signal is sent to the turbocharger.