Publication: Design and simulation of inductor based power management unit integrated circuit (ic) using 180 nm process cmos technology for wider range voltage variation application
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Date
2023-08
Authors
Lim, Zhi Tong
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Abstract
In today’s world, wearable electronic devices be one of the future technology in supporting the intelligent system for digital healthcare application. However, the
battery size be one of the challenging in miniature of wearable system to ensure the compatibility in integrate with textile surrounding the human body. In this project, a battery less power management unit integrated circuit (PMU-IC) which is able to harvest AC current from a flexible coil to act as battery using the concept of magnetic field induction is designed and simulated. The motion of a patient wearing a wearable device can occasionally cause misalignment between coils, thereby weakening the coupling coefficient. This causes variation in the amplitude of the received signal, resulting in inefficient rectification. Hence, the rectified DC signal generated by the variation in the received power signal must be continuously regulated, and a broad range of input voltages must be provided for other circuits, such as the stimulation array and its digital controller. In this project, a system which consists of 3 digital blocks are implemented. These blocks are responsible for managing the input power, delivering command data to determine the stimuli current waveforms to be applied by the stimulators. Additionally, they possess the ability to monitor and track the power level within the system. The project is done by using 180 nm process CMOS technology. A computational software Cadence will be used in this project. The simulation results of rectified voltage and the transmitted data will be observed. The functionality of suggested digital controllers was examined using a Basys 3 FPGA board. All digital components that are necessary to use in the simulation has been created, and the simulation of 3 different rectified voltage level has been successfully carried out. The implemented digital blocks effectively process error data, manage input power, deliver command data and monitor the power level of the system.