CMOS RC oscillator using 0.35 micron for portable mosquito-repel circuit

Mosquito-borne diseases, such as malaria and dengue, are major health concerns in the Philippines. This research provides a CMOS RC oscillator that operates at frequency based on the wing-beat frequency of male mosquitoes and dragonflies, in order to produce ultrasonic signal that repels biting female mosquitoes. This work presents the design and chip layout of CMOS RC oscillator which comprised of inverting amplifiers, diffusion chip resistor, and poly1-insulator-poly2 chip capacitor, and employed the TSMC 0.35 micron dual-polysilicon quad-metal mixed-mode technology. This microelectronic CMOS oscillator can be further developed into portable and wearable mosquito-repel circuits, and can help improve the non-occurrence of malaria and dengue in the country.