To provide a PWM signal creation device that creates a plurality of PWM signals of different frequencies by the use of a single clock (timer).
The PWM signal creation device that has a clock 17 for creating pulses of a period T0 and, on the basis of the period T0 of the pulses created by the clock 17 and a plurality of duty ratios Di, outputs a plurality of simultaneously created PWM signals of different periods Ti to be output with the duty ratios Di comprises: period multiplication means 18, 19 for multiplying the period T0 by k to produce the period Ti; and small duty ratio computation means 18, 19 for computing a duty ratio dim for each period T0 included in the period Ti resulting from the multiplication by k in the period multiplication means 18, 19. The duty ratio for the period Ti is determined on the basis of the computed duty ratio dim for each period T0.
SUGISAWA YUKI
TAKAHASHI SEIJI
SUMITOMO WIRING SYSTEMS
SUMITOMO ELECTRIC INDUSTRIES
| JPS62296775A | 1987-12-24 | |||
| JPH06152349A | 1994-05-31 | |||
| JPH01179632U | 1989-12-22 | |||
| JP2011211509A | 2011-10-20 |
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