A low pressure steam jet fabric finisher for steam setting of dyes on fabric during a steaming cycle, having a substantially cuboid housing which defines a water reservoir with a heating element and a cylindrical steaming chamber. The driver circuit includes possibly a controller and a phase detector coupled to produce an intermittent output proportional to a value of an input relative to upper and lower threshold values, and a difference between the input signal, which is the intermittent output signal, and a reference value. The gate dielectric is located on the semiconductor substrate.