The addition of still another diode-capacitor section to a Voltage trippler, as shown in Below Figure, produces an output four times the peak secondary voltage. C4 charges to 2Vp through D4 on a negative half-cycle. The 4Vp output is taken across C2 and C4, as shown. In both the tripler and quadrupler circuits, the PIV of each diode is 2Vp.