| 摘要 |
PURPOSE:To obtain a converter where the number of pulses in a certain time is selected freely to obtain required high precision and resolution, by generating a pulse whose polarity is equal to that of the output of a positive/negative discriminating means of the motion of a dynamic system, and intervals are a time shorter than the oscillation period of the dynamic system, and controlling the positive/negative time of dynamic feedback in proportion to the difference between the number of positive pulses and that of negative pulses in this oscilation period. CONSTITUTION:A sampling circuit 6 performs sampling with clocks having a period tau shorter than an oscillation period T of a pendulum 1 and generates considerably many pulses in its output e2. These pulses e2 are sent to a counter 8 simultaneously with outputting. The counter 8 is reset at intervals of T seconds when the oscillation period of the pendulum 1 is T seconds, and a difference (i-j) between a number (i) of positive pulses and a number (j) of negative pulses of pulses e2 in the set period is outputted to a feedback current generating circuit 9. If the value (i-j) is positive, the time of a feedback torque is made shorter by a time (i-j)tau'; but if it is negative, the time of the feedback torque is made longer by the same time. |
