PWM current controlling apparatuses capable of optimally...

Details PWM current controlling apparatuses capable of optimally... PWM current controlling apparatuses capable of optimally...

2007-03-07

2009-11-10

Tso, Edward (Department: 2858)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S021010, C363S021050, C363S021130

Reexamination Certificate

active

07616458

ABSTRACT:
In a current controlling apparatus for controlling a load current flowing through a load, a reference level generating circuit generates a reference level signal, and a reference signal generating circuit generates a reference signal in accordance with the reference level signal. A bridge circuit includes a plurality of semiconductor elements so that the semiconductor elements are turned ON and OFF to supply the load current to the load. A sensing circuit senses the load current, to thereby generate a sense signal in accordance with the load current. A current correction circuit including a correction comparator compares the sense signal with the reference level signal to generate a correction signal, so that the reference signal is corrected by the correction signal.

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