| 摘要 |
A monolithically integrated control circuit (4) for a brushless DC motor (1) comprising a commutation signal source (3) controlled by rotational motor position signals, a driver circuit (TS) controlled in accordance with the commutation signals and serving for applying driving pulses, which result in a rotating magnetic field, to the motor windings, with one driver stage (15A, 15B, 15C, 15D) being provided for each motor winding phase, and comprising, furthermore, a pulse shaping circuit (10) effecting sloping of the driving pulse edges, with the pulse shaping circuit (10) being arranged upstream of the driver circuit (TS) and being connected to an external edge sloping impedance means (CA, CB), and the driver stages (15A, 15B, 15C, 15D) being designed as feedback-free amplifier stages fed with driver control pulses (VCA; VCB) that are sloped by means of the pulse shaping circuit (10). |
