2 research outputs found
Energy-Efficient Start-up Power Management for Batteryless Biomedical Implant Devices
This paper presents a solar energy harvesting
power management using the high-efficiency switched capacitor
DC-DC converter for biomedical implant
applications. By employing an on-chip start-up circuit with
parallel connected Photovoltaic (PV) cells, a small efficiency
improvement can be obtained when compared with the
traditional stacked photodiode methodology to boost the
harvested voltage while preserving a single-chip solution. The
PV cells have been optimised in the PC1D software and the
optimal parameters modelled in the Cadence environment. A
cross-coupled circuit with level shifter loop is also proposed to
improve the overall step up voltage output and hybrid converter
increases the start-up speed by 23.5%. The proposed system is
implemented in a standard 0.18-μm CMOS technology.
Simulation results show that the 4-phase start-up and cross coupled
with level-shifter can achieve a maximum efficiency of
60%
Energy-Efficient Start-up Power Management for Batteryless Biomedical Implant Devices
This paper presents a solar energy harvesting
power management using the high-efficiency switched capacitor
DC-DC converter for biomedical implant
applications. By employing an on-chip start-up circuit with
parallel connected Photovoltaic (PV) cells, a small efficiency
improvement can be obtained when compared with the
traditional stacked photodiode methodology to boost the
harvested voltage while preserving a single-chip solution. The
PV cells have been optimised in the PC1D software and the
optimal parameters modelled in the Cadence environment. A
cross-coupled circuit with level shifter loop is also proposed to
improve the overall step up voltage output and hybrid converter
increases the start-up speed by 23.5%. The proposed system is
implemented in a standard 0.18-μm CMOS technology.
Simulation results show that the 4-phase start-up and cross coupled
with level-shifter can achieve a maximum efficiency of
60%