Electrical and Electronic Engineering - Theses

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Start date: 2010 × End date: 2019 × Subject: optimisation × Type: Masters Research thesis ×

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    A low-power minaturised intracranial pressure monitoring microsystem
    Ghanbari, Mohammad Meraj ( 2017)
    The ultimate goal of this work is realisation of a fully implantable chronic intracranial pressure (ICP) monitoring system. Due to the required mm-scale form factor of the implantable device, the available power is scarce. This calls for investigation of new circuit and sensor integration techniques to decrease the total power consumption of the system down to a few hundreds of nano watts. So the main focus of this work is design of an ultra-low power integrated circuit (IC) for measuring ICP. Power consumption minimization of the sensing system proposed in this work paves the way for integration of an RF-power scavenger or biological fuel cells. The proposed sensing system also takes full advantage of Invensense MEMS-CMOS process to heterogeneously integrate the sensor and interface. This integration type requires no post-processing and results in sub-pF sensor-interface parasitic interconnection capacitance Cp which is an order of magnitude smaller than previously reported Cp’s.