• Ms.V.Subashini
• Dr.Su.Suganthi
• G.Valarmathi

A pacemaker is a small device mostly driven by battery. This pacemaker senses when your heart is beating irregularly ie slowly or fastly. It sends a signal to your heart so that it makes your heart beat at the correct pace. Pacemaker batteries can last between 5 and 15 years (average 6 to 7 years), depending on how active your pacemaker is. The wires of your pacemaker also may need to be replaced eventually. Your doctor can tell you whether your pacemaker or its wires need to be replaced. A complete thermal energy harvesting power supply for implantable pacemakers is presented in this paper. The designed power supply includes an internal start-up and does not need any external reference voltage. The start-up circuit includes a pre start-up charge pump and a start-up boost converter. The Pre start-up charge pump consists of an ultra low-voltage oscillator followed by a high-efficiency modified Dickson multiplier. The system is designed so that no failure occurs under overload conditions. Using this approach, a thermal energy harvesting power supply has been designed using 180-nm CMOS technology. According to HSPICE simulation results, the circuit operates from input voltages as low as 40 mV provided from a thermoelectric generator and generates output voltages up to 3 V. A maximum power of 130 μW can be obtained from the output of the boost converter, which means that its efficiency is 60%. A minimum voltage of 60 mV and a maximum time of 400 ms are needed for the circuit to start up.

DCO, boost converter

"A THERMAL ENERGY HARVESTING POWER SUPPLY WITH AN INTERNAL STARTUP POWER SUPPLY FOR PACEMALERS.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.259-265, April-2019, Available :http://www.jetir.org/papers/JETIRBF06051.pdf

"A THERMAL ENERGY HARVESTING POWER SUPPLY WITH AN INTERNAL STARTUP POWER SUPPLY FOR PACEMALERS.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp259-265, April-2019, Available at : http://www.jetir.org/papers/JETIRBF06051.pdf