| 摘要 |
PURPOSE:To improve the responsiveness at a transiently responding time by shortcircuiting a capacitor of a compensator at the transiently responding time that a phase difference exceeds the dynamic range of the circuit. CONSTITUTION:A trapezoidal wave forming circuit 12 outputs a trapezoidal wave (h) in response to a reference signal (g) from a flip-flop 11. On the other hand, a speed pulse (e) is converted to a pulse (s) by monostable multivibrators 31, 32 and a fall differentiator 33. A sample-holding circuit 13 holds the level of the oblique of the wave (h) at a timing of the pulse (s), and outputs as a control signal through a compensator 34. When the output pulse of the multivibrator 31 is delayed and generated, the output of an AND circuit 35 becomes ''H'', a switching circuit 36 is closed to shortcircuit a capacitor C2 of the compensator 34. Thus, it can rapidly direct to the steady state. |
