| 摘要 |
In a device for detecting the flow of a current lower than a given threshold current in a load (L) in series with a power MOS transistor (M1), the free terminal of the MOS transistor is connected to a first terminal (1) of a supply source, the second terminal (2) of which is connected to the free terminal of the load (L), the gate (G1) of the MOS transistor being connected to a control source (3). A means (11) for detecting the voltage drop is connected across the terminals of the MOS transistor and a control loop (12) imposes an appropriate gate voltage to the MOS transistor as soon as the voltage drop across its terminals tends to decrease below a determined level.
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