| 摘要 |
<p>A circuit arrangement for the digitalization of the angle of rotation phi of a rotatable device which is operated at fa rotations per second, employing auxiliary voltages modulated with sin phi and cos phi of a fundamental frequency fo, which with the aid of further circuit elements are converted into a counter pulse train which indicates the angle of rotation, in which n pulses correspond to the angle of rotation of 360 DEG ; wherein from two auxiliary voltages is formed a third auxiliary voltage which contains only one of the frequencies (fo+fa) or (fo-fa), which third auxiliary voltage and a comparison voltage of the frequency n.fo are conducted to a comparator circuit, comprising a D-flip-flop, with the comparison voltage being present at the D-input (preparation input) and the third auxiliary voltage being present at the clock-input, whereby the desired counter pulse train with n.fa is obtained at the output of the D-flip-flop.</p> |
