Contents I. Introduction
In recent years, our generation has been suffering from the scarcity of natural resources and climate changes. Thus, new research and investments in clean and renewable energy resources have been explored with the goal to modify and replace the energy matrix that is currently employed [1]. In this sense, it is necessary to develop low-cost devices with easy integration with photovoltaic cells to measure the angle of solar incidence in order to take full advantage of the power characteristics of these cells [2]–[9]. The integrated circuits based on CMOS technology offer a useful tool to produce low power optoelectronic microdevices [10], [11]. Normally, the CMOS microdevices use photodiodes to convert light into an electric current proportional to its intensity [12].
