Angular values analogue-digital convertor - with angles defined by trigonometric values which enables low cost digital components to be used

摘要

The method is for converting analogue values of angles into digital values by which a electrical voltage representing the analogue value to be transformed is compared with a time variable voltage in order to permit clock pulse counting up to equality of the representative voltage with the variable voltage. From the electrical voltages representing the side and cosine of an angle, one compares these voltages with a sinusoidal voltage and amplitude of the sinusoidal voltage is maintained at the value for which the sinusoidal value representative of the sine and cosine values of the angle.