| 摘要 |
This invention provides an inverter driving circuit for brushless d.c. motor adapted to pass PWM signal to switching elements of the inverter, enabling reduction of the manufacturing cost, the circuit including a general-purpose photo-coupler for producing the PWM by virtue of an internal photo-coupling thereof, a reference voltage generating unit for producing the reference voltage signal, and a comparator which compares a signal from the general-purpose photo-coupler with the reference voltage from the reference voltage generating unit, and passes the resultant as a switching element driving signal to appropriate switching element.
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