CIRCUIT AND METHOD FOR DRIVING PIEZOELECTRIC TRANSFORMER

摘要: PROBLEM TO BE SOLVED: To provide a circuit and method for driving piezoelectric transformer with an improved efficiency wide input voltage range by achieving thin the compact drive circuit. SOLUTION: When sinusoidal wave outputted from AGC 9 is inputted to delta sigma modulator 2, converted one-bit quantization signal. An output driver 4 switched quanitization signal via 3 inverter 12, pulse amplitude of power supply Vdd GND potential generated. With waveform drivers 4, resonance frequency 1 taken out capacity coil 11, thus operating hence efficiently.