The present paper deals with the design of an analog circuit that allows generating the mapping of the cosine function. This design is based on a novel approximation form using electrical parameters of a 90nm Complementary Metal-Oxide-Semiconductor (CMOS) process. The proposed approach has been compared with other reported schemes. Owing to simplicity, the proposed analog circuit is suitable for high frequency applications and where the power resources are limited. As an example, the application of this circuit in the solution of a nonlinear ordinary differential equation is presented. This equation represents the model of the vertical dynamics of a PVTOL (Planar Vertical Take-off and Landing) system. The main advantage with the analog solution for trigonometric functions is a continuous time response at high frequency and with no quantization error.
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