| 摘要 |
PURPOSE:To accurately separate and take out pulses of forward and backward revolutions by generating two phases of pulses of mutually different phase relations according to the revolutions of a rotator and logically processing these pulses. CONSTITUTION:Two phases of pulses A, B of mutually different phase relations according to the revolutions of a rotator are inputted to exclusive OR gates 21, 22 and a delay circuit 23. The outputs of the exclusive OR gates 21, 22 are inputted to AND gates 24, 26, and an inverter 25. The output of the AND gate 24 is generated only at the forward revolution, while the output of the AND gate 26 is generated only at the backward revolution. |
