Integration circuit, decrement circuit, and semiconductor...

Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – By integrating

Reexamination Certificate

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C315S2090SC

Reexamination Certificate

active

07541858

ABSTRACT:
An ignitor comprising a circuit with a millisecond order time constant and with a minimum circuit size and area, which is capable of self-shutdown without leading to erroneous ignition upon detection of an abnormality. An ignitor1capable of self-shutdown upon detection of an abnormality comprises an abnormality detection circuit12whose rise output is applied to the gate of a self-shutdown MOSFET33via an integration circuit33comprised of a diode8and a capacitor9. The gate voltage of IGBT5a, which is a main-current switching device, can be decremented.

REFERENCES:
patent: 3901205 (1975-08-01), Brungsberg
patent: 4417217 (1983-11-01), Sugiyama
patent: 4704639 (1987-11-01), Yamanishi et al.
patent: 5571245 (1996-11-01), Ooyabu et al.
patent: 6336448 (2002-01-01), Furuhata et al.
patent: 6684867 (2004-02-01), Ito et al.
patent: 2001/0037801 (2001-11-01), Ito et al.
patent: 2004/0145749 (2004-07-01), Shigeki et al.
patent: 2001-248529 (2001-09-01), None

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