| 摘要 |
The brushless DC motor driving circuit without a rotator position detector includes a plurality of resistors connected to rotator driving coils, first to third comparators, first to third transistors for turning on stator coils, a ring counter for forcely activating a motor, a fourth comparator for supplying a clock signal to the ring counter, a first OR gate for controlling the ring counter, a first AND gate for advancing an operation of the ring counter by one time, second to fourth AND gates for receiving the output of the ring counter and the outputs of the first to third comparators, a fifth AND gate, a second OR gate, and a first flip-flop for resetting second and third flip-flops of the ring counter using the output of the second OR gate as a clock, thereby miniaturizing the motor.
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