| 摘要 |
PURPOSE:To enlarge the width of speed change and to enable stable speed control by using a simple rotary encoder of small pulse number to amplify pulse width then applying integral conversion. CONSTITUTION:Outputs A0, B0 of a rotary encoder that outputs a two-phase pulse different in phase by 90 deg. is inputted to an exclusive OR circuit 9 to form an output C0. The output C0 is added to the first OR circuit 18 as it is, and the output C0 is added to the second OR circuit 18 after inversion. OR circuits 17, 18 have one-shot multivibrators 11-14, NAND circuits 15, 16, and outputs pulses S1-S8 different in pulse width and timing. Pulses S1-S8 open and close switches of the same sign of integrating circuits 2, 3 and sampling and holding the output of integrating circuits 2, 3 and apply a divided 6 signal and an alternately added 5 signal to a pulse generating circuit 7. A one-shot multivibrator 8 is logically produced to generate a high frequency pulse and speed control excellent in respondence is performed. |
