Integration of CMOS Photodiode and Capacitive Charge Pump Circuits for On Chip Photovoltaic Energy Harvesting

Uluda M., Oktem A. E., DÜNDAR G., YALÇINKAYA A. D.

21st International Conference on Synthesis, Modeling, Analysis and Simulation Methods, and Applications to Circuits Design, SMACD 2025, İstanbul, Türkiye, 7 - 10 Temmuz 2025, (Tam Metin Bildiri) identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/smacd65553.2025.11092276
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Anahtar Kelimeler: CMOS photodiode model, charge pump circuits, energy harvesting
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

This paper presents a CMOS photodiode model that can be fabricated using 65-nm triple-well CMOS technology and its integration with different charge pump circuits for on-chip photovoltaic energy harvesting performed with 650-nm laser light illumination. A selected photodiode configuration available in triple-well technology is simulated to obtain its current-voltage characteristics and develop an equivalent circuit model. Different charge pump circuits are connected to the circuit model of the CMOS photodiode and their combined performances are compared with each other. This photovoltaic energy harvesting system including a CMOS photodiode and a charge pump circuit is designed to supply the integrated circuit blocks in a Magnetic Resonance Imaging (MRI) receiver which means no external power supply and cables are needed. The integrated design reveals an output voltage of 1.09 V and an output current of 4.37 mA for the charge pump circuit. The simulated output voltage ripple is 7.50 mV and efficiency is 70.43%.