Methods and systems for tuning an RC continuous-time filter are disclosed. In one embodiment the control system is integrated, in another it is distributed, in yet another it is a programmable logic controller. Other embodiments for processing color information are included herein. The recess also has at least one cross-sectional extension which extends toward the other axial end. Ions are implanted into one or more portions of the stress layer to form ion-implanted relaxed portions with the portions of the stress layer that are not implanted are un-implanted portions, whereby the inherent stress of the one or more ion-implanted relaxed portions of stress layer portions is relaxed.