To obtain a TFT, in which an off-current value is low and the fluctuation is suppressed, and an electronic equipment provided with the TFT. A generally cylindrical motorized tooth drive having a plurality of drive teeth on an outer cylindrical wall is provided. A first set of control inputs are provided on the outer surface of the housing. The valve is adapted to receive the integrated signal and adjust a valve opening in accordance with the integrated signal. The reduction in flue gas volume allows the implementation of much smaller pollutant control equipment, since the size of the pollutant control units is mainly based on the volume or mass flow rate of flue gas to be treated.