[18a-Z22-1~11] 12.7 Biomedical Engineering and Biochips

△ [18a-Z22-1] Improved voltage measurement circuit for optically-powered, battery-less microdevices

〇Masato Fukamachi¹, Mizuki Takeuchi¹, Yasufumi Yokoshiki¹, Takashi Tokuda¹ (1.Tokyo Tech.)

Keywords:optical power transfer

In this study, we will improve the voltage measurement circuit for optically-powered microdevices.
For the circuit that measures the voltage generated by a micro solar cell and charged in a capacitor, a micro solar cell separate from the power supply for driving the load was previously used to generate the reference voltage for switching. However, this would result in a light-dependent reference voltage. Therefore, we improved the method to generate the reference voltage in the internal circuit. The evaluation of the system is discussed.