Operation control circuit

Details Operation control circuit Operation control circuit

2008-02-05

2010-12-28

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S097000, C363S131000

Reexamination Certificate

active

07859873

ABSTRACT:
It is an object of the present invention to provide an operation control circuit without using a photo-coupler. The operation control circuit controls the operation of an LED in a DC/AC inverter comprising a voltage conversion circuit, a DC/AC conversion circuit for converting output voltage of the voltage conversion circuit to two pieces of AC voltage each with an opposite phase, and an LED which is lit when AC voltage is outputted from the DC/AC conversion circuit. The operation control circuit comprising a rectifier circuit, capacitors connected between the input terminal of the rectifier circuit and the output terminal of the DC/AC conversion circuit, and a comparator circuit connected to the same ground level as the ground level connected to the LED for lighting the LED when voltage V1outputted from the rectifier circuit is higher than a threshold Vref1.

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patent: 2000048979 (2000-02-01), None

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