| 摘要 |
a logic circuit part(10) generating a left/right, forward/reverse contact signal by receiving direction signals(REV)(FWD) and input signals(n-n1); a delay circuit part(11) delaying each output of the logic circuit part; a contact control part(12) switch-controlling the contacts(LF)(LR)(RF)(RR); a motor power control part(13) switch-controlling the source power(BA) of a forward/reverse motor(A); a triangular wave generator(14) generating a triangular pulse; a NAND gate(15) outputting a speed determining signal; and a pulse generating part(16) generating a motor driving pulse.
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