| 摘要 |
PURPOSE: An apparatus is provided to reduce manufacturing costs by simplifying the configuration of the motor driving circuit, while achieving improved accuracy of control of driving motor. CONSTITUTION: An apparatus comprises first and second driving transistors(Q5,Q6) connected to both input terminals of a driving motor(M), wherein the first and second driving transistors have bias resistors(R1,R2) connected to first and second terminals(F2,F1), respectively; first and second connection patterns(A to D, A' to D') connected to the first and second terminals, respectively; mode switches(S1 to S4) connected between the first and second connection patterns in such a manner that the mode switches are open or short-circuited in accordance with the input of air flow mode selection keys; and on/off transistors(Q1 to Q4) connected between the mode switches and the first connection pattern.
|
