Piezoelectric micro-pump and driving circuit thereof

A piezoelectric micro-pump for conveying a fluid, which comprises:

• a case, including an inner chamber, and an inlet and an outlet;
• a piezoelectric element, which is configured in the inner chamber for compressing the space of the inner chamber;
• and,
• a driving circuit for driving the piezoelectric activation element, which includes:
• a driving period generation unit, includes:
• a driving indication signal;
• a programmable micro-controller, which receives the driving indication signal, and generate a programmable driving period signal corresponding to the driving indication signal in response to the driving indication signal;
• a switch circuit unit, which is connected to the driving period generation unit and the piezoelectric activation element, and receives the driving period signal and generates an alternate driving voltage corresponding to the driving period signal, in which the half-wave leading edge of the alternate driving voltage has the waveform of a parabolic curve waveform, and the half-wave trailing edge of the alternate driving voltage has the waveform of approximately a vertical line waveform, and the alternate driving voltage is connected to the piezoelectric activation element.