| 摘要 |
The invention proposes a method of detection of valley inductance current polarity change in a pulse width modulated circuit (10) charged with an inductive charge (9), wherein detection method compares respective times of reaching a predetermined tension between outputs (3, 13) respectively of said pulse width modulated circuit (10) charged with an inductive charge (9) and of a pulse width modulated reference circuit (11) with no inductive charge. |
