Inverter circuit with multilayer piezoelectric transformer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 21, 2001
Grant Date -
N/A
app pub date -
Jul 13, 2000
filing date -
Jul 13, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inverter circuit is provided using a voltage converter having multiple layers of piezoelectric ceramic. More specifically, the present invention provides an inverter circuit for a Cold Cathode Fluorescent Lamp (CCFL) incorporating a multilayer piezoelectric transformer that uses the longitudinal resonant vibration mode for step-up voltage conversion. The transformer is driven by a FET half-bridge connected to an oscillator through dual current buffers, one current buffer being driven through and a level shifter and charge pump.
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