Current detecting circuit

Details Current detecting circuit Current detecting circuit

2004-05-31

2008-09-16

Laxton, Gary L (Department: 2838)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C320S166000

Reexamination Certificate

active

07425799

ABSTRACT:
The object of the present invention is to provide a current detecting circuit capable of detecting a current flowing to a switching device with high accuracy, with less power loss, with high voltage, and in an insulated form.A current detecting circuit of the present invention is provided with a charge circuit charging to a capacitor through a current which is proportional to a voltage developed in a choke coil, and a discharge circuit setting a voltage of the capacitor 0V when the current flowing to the switching device is 0, so that the voltage of the capacitor is detected as a value which is proportional to the current flowing to the switching device.

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patent: 6429604 (2002-08-01), Chang
patent: 6469917 (2002-10-01), Ben-Yaakov
patent: 2002/0171372 (2002-11-01), Motomura et al.
patent: 7-231650 (1995-08-01), None
patent: 10-125484 (1998-05-01), None
patent: 2000-184702 (2000-06-01), None
patent: 2003-125582 (2003-04-01), None

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