Semiconductor integrated circuit

Details Semiconductor integrated circuit Semiconductor integrated circuit

2007-12-18

2007-12-18

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C327S110000, C327S309000

Reexamination Certificate

active

11274184

ABSTRACT:
To provide an output MOS transistor from breaking due to dump surge and counter electromotive, a semiconductor integrated circuit according to an embodiment of the invention includes an output MOS transistor controlling current flowing through a load, a dynamic clamp circuit clamping an overvoltage applied to the output MOS transistor, a delay circuit generating a reference signal by adjusting a level of a gate voltage of the output MOS transistor, and a clamp controlling circuit making the dynamic clamp circuit operate based on the reference signal when a counter electromotive force is applied to the output MOS transistor.

REFERENCES:
patent: 6087877 (2000-07-01), Gonda et al.
patent: 7129759 (2006-10-01), Fukami
patent: 2002-151989 (2002-05-01), None
patent: 2005-223399 (2005-08-01), None

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