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This paper explores the application, development and potential benefits of using Average Voltage Estimation techniques in Matlab/Simulink modelling of Permanent Magnet AC (PMAC) electric motor and generator drive systems. These models can include all elements of a multi-technology system; electrical circuits, power electronics, digital control, electro-magnetic machine, dynamic mechanical loads, and...
When charging electric vehicles inductively, living objects must be prevented from being exposed to the magnetic field. Therefore, additional sensors are used to detect endangered objects under the vehicle. This ensures that the charging process can be stopped immediately if endangered objects stay inside the hazardous zone. To prevent the system from unintended charging switch-offs, it is preferable...
Noise analysis of switched capacitor amplifier-based sensor interface circuit has been presented in this paper. It is shown that the main noise of the circuit has been generated by the amplifier. Even though specification of the switches effects the efficiency of the circuit, their influence on the output referred noise is trivial and can be ignored. The circuit has been simulated with ELDO in UMC...
One of the key challenges for state of the art radio systems is enabling efficient utilisation of the Radio Frequency (RF) spectrum. Licensed frequency bands are often under-utilised in both time and geographical location and thus the opportunity exists for secondary users to transmit in these bands, provided that they do not interfere significantly with the operation of the primary licensed user...
Due to an increasing demand for on-sensor biosignal processing in wireless ambulatory applications, it is crucial to reduce the power consumption and hardware cost of the signal processing units. Discrete Wavelet Transform (DWT) is very popular tool in artifact removal, detection and compression for time-frequency analysis of biosignals and can be implemented as two-branch filter bank. This work proposes...
In this paper a prototype of a free-space optical communication system is proposed. The transmitter is equipped with a blue 1W LED and a low-cost microcontroller implementing a digital modulation scheme. The receiver converts the incoming light into a current through a photodiode and another identical microcontroller is employed to demodulate and decode the signal, after proper analog amplification...
Intracortical microstimulation (ICMS) in the primary somatosensory cortex (S1) offers a potential method to restore somatosensory perception in people that have lost this capacity through injury or disease. Under an Investigation Device Exemption, a twenty-eight year old participant with a long-term cervical spinal cord injury was implanted with two microelectrode arrays in primary motor cortex and...
In this paper, a novel image sensor architecture based on a clock-less readout is presented. The proposed proof-of-concept consists of only 12x6 pixels and validates the new readout scheme designed for low power application, which is particularly suitable for embedding energy harvesting circuit even though not included into the design. Thanks to the clock-less serial readout with embedded PWM interface,...
Personalized drug dosage is crucial to ensure op- timal benefit in patient’s treatments. Therefore, many efforts are done in developing integrated, low-cost and portable point- of-care sensing systems able to continuously monitor the drug concentration. To satisfy this request, a portable multi-channel system is here presented and validated. The system is able to run different electrochemical techniques...
A clock recovery gated phase locked loop (GPLL) for periodically missing input signals and 100% amplitude shift keying modulation is presented. The On-Off keying scheme leads to long periods without an RF signal to extract. This poses special requirements that can be met by using gated PFDs. The power control technique used in this implant periodically shorts the receiving coil, thus limiting the...
In most robotic and biomedical applications, the interest for real-time embedded systems with tactile ability has been growing. For example in prosthetics, a dedicated portable system is needed for developing wearable devices. The main challenges for such systems are low latency, low power consumption and reduced hardware complexity. In order to improve hardware efficiency and reduce power consumption,...
In many engineering areas complex systems are composed of sub-parts that are modeled and analyzed in very different ways. These subsystems are often heterogeneous parts of the complex system that have to be analysed or designed in a communal environment. This has been triggering the development of "open" numerical subsystems that can be "glued" together in a shared numerical "backplane"...
This work introduces a Tunable Error Detection&Correction strategy (TED-C) aimed at improving the efficiency of adaptive voltage over-scaling (AVOS) in error-resilient applications. Through TED-C, the error coverage can be adjusted at run-time in order to accelerate the voltage scaling and achieve ultra-low energy consumption at the cost of quality-of-result (QoR). The mechanism is built upon...
The microbial fuel cells (MFCs) are emerging energy harvesters that are promising for the autonomous supply of seafloors remote sensors. Regarding the low voltage and power level delivered by MFC an electrical interface is required to condition the sensors needs. The flyback in discontinuous conduction mode appears to be the best candidate to extract the maximum power delivered by the MFC, to electrically...
The implementation of tactile data decoding on low power embedded system is crucial for the development of e-skin systems that are body worn and supplied by batteries. These embedded electronic systems have to comply with severe constraints imposed by the application, especially real-time functionality battery lifetime. One of the main challenges it to find a sweet spot between power consumption and...
Machine Learning flooded many research fields, including Electronic Design Automation (EDA). The availability of algorithms that can solve complex problems through generic rule formulations represent a fresh opportunity to improve existing design paradigms. In this work we investigate the use of machine learning to manipulate logic circuits. More specifically, we envision the use of Classification...
Contemporary sensor-based robotic systems tend to use an ad-hoc combination of off-the-shelf components for onboard computational needs. The number and type of sensors present, the number and organization of the onboard processors, and the algorithms utilized for processing high bandwidth real-time sensor data present researchers and designers with a wide range of choices for which they are currently...
Recently, most of researchers focus on low-power design for monitoring, and controlling different smart platforms. Generating reference voltages for power conditioning of these systems is one of the main design challenges of these systems. Therefore, bandgap reference (BGR) is required for providing a temperature, and supply independent reference voltage. This paper presents a CMOS lowvoltageself-startup...
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