| 摘要 |
<p>The circuit (3) has charging sub-circuits (3a, 3b) delivering charging current, respectively, where the circuit is arranged to produce the charging current for charging a capacitor (2) independent of a switching signal. The circuit is provided such that value of one of the charging current is constant and equal to a pre-determined charging current value and/or the value of the other charging current is constant and same to another pre-determined charging current value. The latter pre-determined charging current value is larger than the former pre-determined charging current value. Independent claims are also included for the following: (1) a universal serial bus device that comprises a switching device (2) a method for operating the universal serial bus device.</p> |
