Rotary valves are disclosed, comprising a seal sheet affixed to a rotor. The method may also convolutionally encode the bits of data so that the same equation is also always an integer. The isolation housing fluidly isolates the internal rotor chamber from the stator. The frequency of these pulses is directly proportional and linear with the count value put into the increment register. A control gate is formed over the charge blocking layer. A fenced insulation layer is formed around the sacrificial plug simultaneously.