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To reduce conservative timing margin, many timing-error detection techniques by monitoring selected critical paths had been proposed. However, traditional adaptive methods incur significant area overheads and cannot prevent the error that is forming in the current clock cycle. In this paper, a low-overhead Transition-Detector (TD) with a 9-transistor current sensing circuit is proposed. TDs are inserted...
In digital mammography imaging, the quality of the acquired x-ray images is important in examining the human breast for diagnosis and screening. The noise power spectrum (NPS), modulation transfer function, and detective quantum efficiency (DQE) are usually measured to quantitatively evaluate the detector performance. In this paper, the precision of the NPS and DQE properties of several detectors...
Magnetic nanoparticle (MNP) thermometry will be necessary for safe therapeutic implementation of magnetic nanoparticle hyperthermia, a developing cancer treatment. One realization of a MNP thermometer works by detecting harmonic signal (the fundamental f and 3f harmonics) generated by MNPs exposed to ac magnetic field. In this paper, we aim to measure accurately the harmonic signal in a MNP thermometer,...
This paper presents the design, optimization, and characterization of a square-law power detector for heterodyne millimeter-wave radiometers implemented using 0.13 μm SiGe HBTs. A 3-dB bandwidth of 19–34 GHz (56% fractional bandwidth) is obtained through the use of inductively degenerated SiGe HBTs with large emitter lengths. The detector achieves a minimum noise-equivalent power (NEP) of 0.49 pW/VHz...
Keyword extraction is widely used for information indexing, compressing, summarizing, etc. Existing keyword extraction techniques apply various text-based algorithms and metrics to locate the keywords. At the same time, some types of audio and audiovisual content, e. g. lectures, talks, interviews and other speech-oriented information, allow to perform keyword search by prosodic accents made by a...
Performance of a detector based on AlGaAs/InGaAs/GaAs-material system was studied. The detector was comprised of large serpentine array of high-electron mobility transistors (HEMTs) connected in series. The floating drain contact of each transistor (except the last one) served as a source for the next one. Detection of terahertz (THz) radiation was based on the excitation of electron plasma oscillations...
The designing of instruments aimed to measure electromagnetic interference (EMI) is particularly challenging. The most critical aspect is the high dynamic range, which is required to avoid overload conditions and thus to guarantee reliable measurements. Unfortunately, also adhering to today's standards (i.e., CISPR 16-1-1) is not sufficient to avert overload phenomena. With three simple experiments,...
Infrared (IR) guided missiles remain a threat to both military and civilian aircraft, and as such, the development of effective countermeasures against this threat remains vital. A simulation has been developed to assess the effectiveness of a jammer signal against a conical-scan seeker by testing critical jammer parameters. The critical parameters of a jammer signal are the jam-to-signal (J/S) ratio,...
A low-noise readout interface integrated with an antenna-coupled FET-based terahertz (THz) detector is designed and fabricated in a 0.15-μm CMOS standard technology. The implemented readout includes a cascade of a preamplification noise reduction stage based on a parametric chopper amplifier, and a direct analog-to-digital conversion by means of an incremental ΣΔ converter, substituting the lock-in...
Most people feel sad or irritable from time to time. They may say they're in a bad mood. A mood disorder is different. It affects a person's everyday emotional state. In psychology, the mood is referred as a positive or a negative emotional state. Due to the complexity and instability of personal mood, assessing and analyzing mood is difficult and inconvenient. This study aims to assess the human...
Terahertz (THz) direct detectors based on superconducting niobium nitride (NbN) hot electron bolometers (HEBs) with microwave (MW) injection have been studied. Compared to the thermal biasing method, the injected MW is used here to bias the HEB to the optimum point. MW can be expected to be used as the easy read out for the detecting array. The used NbN HEB has an excellent performance as heterodyne...
We present performance characterization of a bio-potential recording system with an asynchronous readout architecture. The signal processing chain consists of a low-noise bio-potential amplifier, spike detection circuitry, and an address event representation (AER) communication protocol. The system was fabricated in a 0.5 pm CMOS technology. Each stage of the recording system was tested individually,...
This paper proposes a frequency-offset method to determine a conversion coefficient of an extremely low-frequency magnetic field (ELF-MF) detector to measure the strength of a power-line magnetic field, which is caused by electricity operating at 60 or 50 Hz. Using the frequency-offset method, the conversion coefficient can be determined in spite of interference caused by ambient noise. The frequency-offset...
Detection of partial discharge (PD) in the frequency range ultrawide band (UWB) provides some benefits such as in a more accurate observation of the PD pulse shape and the PD frequency spectrum. One method to measure the PD signals in the UWB frequency range is by using the PD detecting impedance circuit. The 50 ohm detecting impedance is used as a coupling device to maximize power transfer of PD...
This paper reports on the first demonstration of ultra-fast (thermal time constant, τ ∼80 μs) and high resolution (noise equivalent power, NEP ∼656 pW/Hz1/2) infrared detectors based on high quality factor 50-nm thick aluminum nitride (AlN) piezoelectric resonant nano-plates. For the first time, we show that by employing nanoscale (30 nm) aluminum anchors, both high thermal resistance (Rth ∼9.2×10...
Reduction of the number of sensors needed to evaluate arm movements, makes a system for the assessment of human body movements more suitable for clinical practice and daily life assessments. In this study, we propose an algorithm to reconstruct lower arm orientation, velocity and position, based on a sensing system which consists of only one inertial measurement unit (IMU) to the forearm. Lower arm...
We report a neural recording system with embedded lossless compression using spatiotemporal correlation and sparsity of neural signals to reduce dynamic power (Pd) dissipation for data transmission in high-density neural recording systems. We could successfully compress the data rate of neural signals by a factor of 5.35 (local field potential, LFP) and 10.54 (action potential, AP), respectively....
A new methodology to measure the product-like AC stress of metal critical peak current was implemented in 16nm High-K Metal Gate (HKMG) FINFET process. Traditional TLP tester can only generate minimum 1ns pulse width stress, which is still in thermal diffusion metal burn out regime. The proposed method can generate minimum pulse width of 100ps stress waveform through on-die tunable pulse-width generator...
This article presents low power frequency synthesizer with phase to analog converter (PAC) and aperture phase detector (APD) to cut down noise and power and outcome lower reference spur. The proposed frequency synthesizer is build-in wireless power receiver system to meet low power requirement for transmission efficiency optimization. During locked condition, the synthesizer can catch to compare the...
In this paper, an interferer-tolerant receiver for the first group of ultra-wideband systems (3.1–4.8 GHz) is presented. The entire system operates in two modes; detecting and receiving. In the detecting mode, the locations of up to three blockers in 2.35–2.75 GHz and 5.1–5.9 GHz bands are reported to three notch filters used in the receiving path for rejection. In the receiving mode, the receiver...
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