4. Electric power conversion systems
  5. Frequency conversion without intermediate conversion to d.c.
  6. By semiconductor converter

Gyu-Hyeong Cho

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Active matrix OLED driving circuit using current feedback

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate

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CMOS variable gain amplifier for controlling dB linear gain

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate

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Control method and apparatus for a UFC for minimizing input curr

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
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Discharge lamp driving circuit

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate

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Discharge lamp driving circuit and method of driving a...

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate

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Profile ID: LFUS-PAI-P-857625

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