TY - GEN
T1 - A 95mV-startup step-up converter with VTH-tuned oscillator by fixed-charge programming and capacitor pass-on scheme
AU - Chen, Po-Hung
AU - Ishida, Koichi
AU - Ikeuchi, Katsuyuki
AU - Zhang, Xin
AU - Honda, Kentaro
AU - Okuma, Yasuyuki
AU - Ryu, Yoshikatsu
AU - Takamiya, Makoto
AU - Sakurai, Takayasu
PY - 2011/5/12
Y1 - 2011/5/12
N2 - Harvesting energy from the environment by using a thermoelectric generator (TEG) or photovoltaic cells provides a solution for battery-free sensor networks or electronic healthcare systems. In these systems, the harvested energy is supplied at a very low voltages, requiring a low-startup-voltage power circuit for kick-start from low voltage. A previous sub-100mV-startup-voltage boost converter [1] was implemented by using a mechanically assisted step-up process that needs vibration at startup and the application is rather limited. In this paper, a 95mV startup voltage step-up converter without any mechanical stimulus extends the applicability of energy harvesting. The circuit converts a 100mV input to a 0.9V output with 72% conversion efficiency without any external clocks or mechanical switches. A capacitor pass-on scheme eliminates an additional external output capacitor that functions only at the startup.
AB - Harvesting energy from the environment by using a thermoelectric generator (TEG) or photovoltaic cells provides a solution for battery-free sensor networks or electronic healthcare systems. In these systems, the harvested energy is supplied at a very low voltages, requiring a low-startup-voltage power circuit for kick-start from low voltage. A previous sub-100mV-startup-voltage boost converter [1] was implemented by using a mechanically assisted step-up process that needs vibration at startup and the application is rather limited. In this paper, a 95mV startup voltage step-up converter without any mechanical stimulus extends the applicability of energy harvesting. The circuit converts a 100mV input to a 0.9V output with 72% conversion efficiency without any external clocks or mechanical switches. A capacitor pass-on scheme eliminates an additional external output capacitor that functions only at the startup.
UR - http://www.scopus.com/inward/record.url?scp=79955719876&partnerID=8YFLogxK
U2 - 10.1109/ISSCC.2011.5746290
DO - 10.1109/ISSCC.2011.5746290
M3 - Conference contribution
AN - SCOPUS:79955719876
SN - 9781612843001
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 216
EP - 217
BT - 2011 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, ISSCC 2011
Y2 - 20 February 2011 through 24 February 2011
ER -
