| 摘要 |
PURPOSE:To simplify driving circuit by supplying the inversional signal of the lowest bit to the forward shift input terminal of reversible shift resistor and also by supplying the inversional signal of the highest bit to the reverse shift input terminal. CONSTITUTION:The output 44 of the 6-bit reversible shift resistor 63 is inversed by the inverter 64, and the signal 50 is used as input signal for reverse shifting of the resistor 63 and also the output 49 is inversed by the inverter 69. Then, the signal 55 is used as input signal for the forward shifting of the resistor 63. And, the not-and of each signal is taken in such a way that the signal 56 of the first phase of the pulse motor PM is with the signals 44 and 55 and also the signal 57 of the second phase is with the signals 46 and 45, and then they are amplified by the inversional amplfiers 76 to 81 for driving. Thus, the logical operation circuit is made up of one 6-bit reversible shift resistor, 6 ''not-and'' or ''and'' circuits, and 6 inverters, so that the simplification of circuit can be greatly attained. |
