The present invention relates to peroxide containing oral care compositions containing a flavor system that effectively masks the undesirable taste and sensations due to peroxide. The RF front-end system includes one or more RF front-end components and a programmable logic device, which has a baseband interface for coupling to a baseband digital signal processor, and a set of component interfaces for coupling to the one ore more RF front-end components. The angle of inclination with respect to the screen is detected from the rotational angle associated with the maximum value of the level of the reflected wave thereby to correct the trapezoidal distortion.