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A device aimed at restoring the sensory feedback in amputees is presented. Biphasic current pulses can be generated and delivered to the Peripheral Neural System (PNS) through neural electrodes. The current pulses can be controlled in terms of amplitude, width and frequency. Moreover, the system can be configured to generate customized waveforms. The device is based on an IC implemented on a 0.35um...
Providing sensory feedback for myoelectric prosthetic users can not only increase the manipulation ability but can also introduce a feeling of embodiment. Previous research has demonstrated the feasibility of providing mechanotactile or vibrotactile feedback on the remaining stumps of amputees. To improve the recognition rate and reduce mental work load when identifying stimulation patterns, we propose...
This work describes the design steps of a Bandgap Voltage Reference (BGR) with second order curvature compensation to be used in the Space applications. The work focuses on the design of the different sub-circuits which integrate the BGR and the implementation of the trimming sections, to improve the performance in all the special conditions that characterize the target environment. The circuit was...
Radio frequency spectrum is pushed to higher frequencies as semiconductor technology scales. Fine-line semiconductor processes have enabled the realization of higher speed circuits. However, if the data communication technology is to be pushed to even higher speeds, novel circuit techniques will be required to overcome process limitations. In this work, we present a technique that overcomes the limitations...
A 7 GHz X-band low noise amplifier for space applications is designed using 0.18 µm UMC CMOS Mixed-Mode/RF technology. The LNA is designed for being tested at temperatures below 100 K (also called cryogenic temperatures) and under radiation. Inductively degenerated cascode topology is used and an extra bias inductor has been added to improve input matching. Designed CMOS LNA achieves a voltage gain...
An ultra-low power and high performance voltage-mode sense amplifier is presented. Based on charge recycling between a tank capacitor and the bit line parasitic capacitor, a reference voltage is created dynamically and the memory precharge step starts from half the supply voltage. The precharge and word line activation are independent, avoiding the extra consumption due to the direct path between...
A quantum random generator based on photon detection is here presented. The system consists of a source of photons, typically a commercial LED, coupled with a detector with single photon detection capability. The detector in this case is represented by a single pixel consisting of a SPAD and a time stamp circuit, which samples the arrival time of impinging photons within a predefined temporal window...
Location Based Services (LBS) have been gaining a great deal of attention thanks to their capability to enhance mobile services with location awareness. While outdoor localization is almost universally achieved via Global Positioning System (GPS), indoor localization is still challenging and a general solution is yet to be found. In a vision where wearable devices are taking over smartphones' leading...
In this paper, we present a novel event-based image acquisition mechanism dedicated to industrial vision system under hardware constraints. This technique relies on smoothing the data throughput of the image sensor through time, decreasing information collision and without adding complex communication systems such as address event representation (AER). This technique can also reduce the data throughput...
In the context of an increasing preoccupation to reduce the number of road accidents, wireless communications have been identified as a promising solutions in this area. This paper presents the simulation results for a Visible Light Communications (VLC) sensor envisioned for vehicular communication applications. Since the outdoor VLC channel can be affected by multiple noise sources, numerical filters...
Memristors are novel devices that are used to replace SRAMs as memory arrays in the near future. Therefore, this work investigates the impact of radiation on memristorbased memory. Moreover, this work aims at calculating the critical charge that causes soft errors due to an alpha particle or a neutron strike in HP memristor using analytical models. These models are verified by using Cadence Spectre...
This work reports the latest results of the development of a tri-axial force sensors designed to be implemented in a master socket for a fast customization of prosthetic socket for lower limb. Up to now, the production of a prosthetic socket is a handcraft process that strongly depends on the prosthetist experience. The device presented in this paper is designed to provide a more detailed data to...
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...
In the field of life science, fluorescent imaging techniques are often adopted to investigate activities of cells. Previously, we have proposed the application of fluorescent imaging for the odor sensing system. The system relays a temporal change in odorant concentration via a change in fluorescent intensity by utilizing a cell with an olfactory receptor and a fluorescent protein. However, the system...
Finding voltage gains with Trajectance analysis is introduced in this paper. First, all paths that connect the input to output nodes of the circuit through sequential passive components and dependent active sources are determined. Second, the segment of these paths are shorted to ground and the Suspendance is calculated. Third, the contributions of each Trajectance path is multiplied by its corresponding...
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...
This paper presents alias rejection improvement in a two-stage cosine filter-based two-stage structure for even decimation factors, a structure recently proposed in literature. The structure improves alias rejection in all odd comb folding bands by introducing simple modified cosine filter at the second stage. The goal here is to improve the aliasing rejection in even folding bands, while keeping...
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...
The modern acquisition and processing systems digitalize the input signal directly at radio-frequency (RF) by using Analog-to-Digital (AD) converters, that works up to several hundreds of MHz, and then process the signal numerically in powerful flexible digital devices like the Field Programmable Gate Arrays (FPGAs). A digital coherent demodulation is the first processing step in several applications...
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