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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...
This paper presents the algorithm and architecture for approximate distribute arithmetic (ADA), which tolerates timing faults in SRAM- or ROM-based lookup tables (LUT) at ultra-low voltages by applying fine-grained bit-slice skipping and compensation. A zero count-based timing fault detector is also proposed, where false-negative detections with seriously decreased SNR are completely avoided. The...
This paper presents a Bluetooth Low Energy (BLE) based receiver that features a low power LNA and a novel passive AND function mixer. The entire receiver is designed and simulated in the TSMC 65nm planar CMOS technology. The receiver benefits from a direct down conversion technique where the baseband signals are separated into I/Q paths based on the phase of the signal. The overall input sensitivity...
Approximate computing circuits are considered as a promising solution to reduce the power consumption in embedded data processing. This paper proposes an FPGA implementation for an approximate multiplier based on inexact adder circuits. The performance of the proposed multiplier is evaluated by comparing the power consumption, the accuracy of computation, and the time delay with those of an approximate...
This paper presents a CMOS capacitance-to-digital converter (CDC) for capacitive sensors applications. Off-chip capacitive sensors are fabricated by coating sensing materials on interdigitated electrode (IDE) structure. A CDC consists of a capacitance-to-voltage front-end and 12-bit successive approximation register analog-to-digital converter (SAR-ADC) in a single chip is used for converting sensor...
Unmanned aerial vehicles are aggressively entering many fields of scientific research thanks to their versatility, relatively low cost and ease of customization. Among all the envisioned applications, environmental monitoring and disaster recovery are very interesting and promising. In this scenario, drones instrumented with environmental sensors are driven into contaminated or inaccessible areas...
This work describes an approximate DCT architecture for the High Efficiency Video Coding (HEVC) standard. Since the standard requires to support multiple block sizes, architectures based on exact implementation require a relevant amount of hardware resources, namely multipliers and adders. This work aims to reduce the amount of hardware resources while keeping the rate-distortion performance nearly...
In this work, a regulated high negative voltage generator for biasing single-photon avalanche photodiodes (SPAD) was developed. The circuit provides up to -70 V from a positive voltage source. This circuit allows users to control the negative output voltage using a positive voltage rail, thus eliminating the requirement of a negative voltage for the negative voltage control. This approach simplifies...
This paper offers novel insights in the importance of optimal design of the connections between component ground plane and the common reference plane in integrated Silicon circuits while presenting a differential 1.5-2.5 GHz wide bandpass filter design based on lumped elements and manufactured in Global Foundries SiGe 8HP BiCMOS process. Lumped elements are rarely implemented because of their size...
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...
Analog FIR filters are critical components of advanced data processing and communication systems. Unlike digital filters, they do not utilize clock signals, but require broad-band analog delay units and variable-gain linear amplifiers. This paper describes a 9-tap linear FIR filter IC with a novel tree-shaped architecture based on an internal transmission line with a special configuration and variable-gain...
Modern prostheses aim at restoring the functional and aesthetic characteristics of the lost limb. To foster prosthesis embodiment and functionality, it is necessary to re-establish both volitional control and sensory feedback. Contemporary feedback interfaces presented in research use few sensors and stimulation units to feedback at most two discrete feedback variables (e.g., grasping force and aperture),...
Gesture control plays an increasingly significant role in modern human-machine interactions. This paper presents an innovative method of gesture recognition using flexible capacitive pressure sensor attached on user’s wrist towards computer vision and connecting senses on fingers. The method is based on the pressure variations around the wrist when the gesture changes. Flexible and ultrathin capacitive...
This paper presents an alternative to electrical configuration of capacitive energy harvesters with multiple transducers. The configuration is constructed to combine all the transducer outputs into a single output and performs identically to the linear two-port model. Further development of a power electronic interface circuit is investigated by circuit simulation. The circuit is used to convert the...
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 paper presents an overview of a family of asynchronous arbitration primitives designed to increase the resilience and efficiency of the new generation of circuits and systems. We cover primitives for synchronisation and decision-making with an emphasis on interfacing analogue and digital worlds, sampling of non-persistent signals, and efficient handling of correlated sensor events.
Fine-grained power management of largely-integrated manycore systems is becoming mainstream in order to deal with tight power budgets. As a result, some level of asynchrony is becoming inevitable for efficient system-level operation. Asynchronous interconnection networks naturally provide such asynchrony, however their wide industrial uptake depends on the capability to overcome two fundamental barriers:...
To characterize chemoresistive sensors based on novel materials a versatile measurement system is required that is able to accurately control/measure all the quantities of interest (among which test gas mixture composition, relative humidity, sensor surface temperature, sensor resistance). In the last years the authors have developed a laboratory measurement system with these characteristics [1],...
The size of counterfeiting activities is increasing day by day. These activities are encountered especially in electronics market. In this paper, a countermeasure against counterfeiting on intellectual properties (IP) on Field-Programmable Gate Arrays (FPGA) is proposed. FPGA vendors provide bitstream ciphering as an IP security solution such as battery-backed or non-volatile FPGAs. However, these...
Development of tactile sensing systems is motivated by the possibility of application in many domains such as robotics, prosthetics, and industrial automation. This paper provides a functionality assessment of an interface electronic circuit prototype for tactile sensing systems. The circuits are based on the DDC112U and an FPGA Xilinx Spartan-6. An experimental setup is carried out to measure the...
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