According to the invention, only one type of enhancement MOS transistor type is used in implementing typical Boolean functions in hardware. Preferably, the MOS transistor type allows back bias control for adjusting and compensating the operation conditions. When implemented in PMOS only transistors, the pull-down functionality is performed by a single transistor with its gate and source connected to the output. This type of connection ensures that the pull-down functionality is performed by the leakage current of the pull-down transistor. The leakage currents of all the pull-up transistors need to be smaller than this pull-down current when all the pull-up paths are off. The ratio of these off-currents can be adjusted by the aspect ratios of the transistors. The logic type offers extremely low current consumption with low voltages and offers the possibility to avoid more complex shut-down circuitry often used in ultra low-power designs. The logic type offers higher operation speed compared to the existing solutions.