Diagnostic power driver circuit

Details Diagnostic power driver circuit Diagnostic power driver circuit

1997-05-30

1999-04-20

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327424, 318434, H03K 1756

Patent

active

058960570

ABSTRACT:
A troubleshooting circuit for locating malfunctions while driving an electric load by means of a bridge stage (M1, M2, M3, M4) which is connected between ground (GND) and the power supply (+VCC) in series with first and second resistors (Rsl, Rsh), respectively. First (COMP1) and second (COMP2) threshold comparators are coupled to the first resistor to sense a short-circuit to battery (+VCC) and an open-load condition, respectively. Coupled to the second resistor is a third threshold comparator (COMP3) adapted to sense a short-circuit to ground. The output signals from the comparators are sampled through flip-flops (FF1, FF2, FF3, FF4, FF5, FF6) upon a transistor in the bridge being switched to the off state.

REFERENCES:
patent: 5111123 (1992-05-01), Hach et al.
patent: 5457364 (1995-10-01), Bilotti et al.
patent: 5703490 (1997-12-01), Kennedy

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