Design and implementation of driving control circuit of a SAW electronic cigarette atomization chip

Abstract

In order to meet the requirements of MHz high frequency driving in SAW(surface acoustic wave)-electronic cigarette atomization chip, a novel driving and controlling circuit has been designed and developed based on MCU control and DDS(direct digital frequency synthesis) technology, which is composed of MCU control module, signal generation module, signal processing module, human-machine interaction module, and power supply module. The systematic test platform has been setup, and the working performance of the driving and controlling circuit has been tested and analyzed. The results show that the circuit can realize sinu- soidal signal output with high frequency from 0 MHz to 65 MHz, small frequency error(~0.02%-1.9%), and adjustable power up to 4.5 W. Further, the circuit also shows significant performances with stable and reliable signal output, high precision, wide frequency range, and strong load driving capability. The work of this paper will potentially drive the application of SAW technology in the atomization of E-liquid, and the circuit can also be extended to be applied in other fields in SAW-microfluid atomization.

Keywords

• surface acoustic wave
• electronic cigarette
• atomization
• direct digital frequency synthesis
• drive and control