Drive circuit supplying current to load based on control...

Details Drive circuit supplying current to load based on control... Drive circuit supplying current to load based on control...

2006-05-29

2010-11-02

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S2090SC, C315S226000

Reexamination Certificate

active

07825604

ABSTRACT:
A drive circuit (100) includes an operational amplifier (OP1) that compares a voltage applied to an inverting input terminal with a reference voltage applied to a non-inverting input terminal, a MOS transistor (M1) that has an output connected to the inverting input terminal of the operational amplifier (OP1) and supplies a current to a load (3) depending on a comparison result of the operational amplifier (OP1), and a switch (SW1) that switches, based on a control signal, between outputting the comparison result of the operational amplifier (OP1) to the MOS transistor (M1) and outputting a predetermined voltage to the MOS transistor (M1) to turn off the MOS transistor (M1).

REFERENCES:
patent: 3697860 (1972-10-01), Baker
patent: 4301393 (1981-11-01), Shoji et al.
patent: 6222357 (2001-04-01), Sakuragi
patent: 01-294070 (1989-11-01), None
patent: 5-102821 (1993-04-01), None
patent: 05-335911 (1993-12-01), None
patent: 06-120599 (1994-04-01), None
patent: 07-321623 (1995-12-01), None
patent: 2001-326703 (2001-11-01), None
patent: 2003-202541 (2003-07-01), None

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