| 摘要 |
The present invention relates to a generation method of an analogue signal generated by a PWM signal whose cyclic ratio and period are parametrizable. It is thus possible choose the pair formed from the cyclic ratio and the period producing an analogue value that is the closest to the value corresponding to the programmed command value. But the differences between the analogue values can be very great and generate zones of imprecision of variable width. Outside of these zones, the generated analogue signal is very precise. As a result, when the command value associated with a pair is imprecise, a digital shift is applied to the command value at the same time as the application of an analogue shift means. Both shifts have the same amplitude and of opposite directions such that the cancel each other out, producing a precise analogue value. The present invention also relates to a device for generating an analogue signal implementing the method.
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