Transformer winding technique with reduced parasitic capacitance effects
 A method of winding a step-up transformer substantially minimizes the parasitic capacitance effects between the primary coil of the transformer and the secondary coil of the transformer. The primary coil is wound around a sectional bobbin and laid upon the bobbin in a winding direction that is opposite to the winding direction of the secondary coil. The opposite winding directions allow the high-voltage terminal ends of the primary and secondary coils to be maximally separated. The maximal separation of high-voltage signals within each coil reduces the effects of the capacitive coupling between the coils, and also maximizes the breakdown voltage between the coils. In a preferred embodiment, the auxiliary coil of the step-up transformer is also configured to minimize the effects of capacitive coupling and to maximize the breakdown voltage among the coils. 
Philips Electronics North America Corporation
H H H
H05B H01F H05B
inventional inventional inventional
Roderick T. Chin
Himman Chang