Electrical circuit for generating an analog output signal, representing a trigonometric function value, from an analog input signal representing an argument value

摘要

Electronic circuits for generating trigonometric function values (cos x1, sin x1) and inverse function values (arcsin x1, arccos x1, arctg x1) on the basis of the switch-capacitor technique are proposed and elaborated in order to produce circuits which can be integrated without problems. A function value (B1cos( pi x1/b)) is taken from the cosine voltage (V1 = Acos( omega t)) of a harmonic oscillator (1) when the input signal (x1) and a triangular voltage (VT) synchronous with the cosine voltage (V1) match. <IMAGE>