Device and a process for detecting current flow in a MOS transis

Details Device and a process for detecting current flow in a MOS transis Device and a process for detecting current flow in a MOS transis

1990-01-19

1991-04-02

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323279, 361 91, G05F 1573

Patent

active

050049704

ABSTRACT:
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.

REFERENCES:
patent: 3939399 (1976-02-01), Funatsu et al.
patent: 4021701 (1977-05-01), Davies
patent: 4319181 (1982-03-01), Wrathall
patent: 4599554 (1986-07-01), Jaycox et al.
patent: 4703390 (1987-10-01), Fay et al.
patent: 4704572 (1987-11-01), Melbert
patent: 4750079 (1988-06-01), Fay et al.

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