| 摘要 |
Device for measuring a saw tooth shaped current comprises an impulse transformer (10), with a primary circuit (12) in which the saw tooth current circulates and a secondary circuit (14) in which there is a current proportional to the saw tooth current. The output circuit has two terminals (16, 18) across which a measurement circuit (22) is connected. The latter has a switch (32) and means (33) for synchronizing the switch with the saw tooth current, such that a current only flows when it has a clear positive or negative value and not when there is a null value. The switch can be a MOS transistor or a junction transistor.
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