Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
An overview of main results concerning THz detection related to plasma nonlinearities in nanometer field effect transistors is presented. In particular nonlinearity and dynamic range of these detectors are discussed. As a conclusion, we will show one of the first real world application of the FET THz detectors: a demonstrator of the imager developed for fast postal security.
The very faint spontaneous near-infrared photon emission of scaled SOI FETs fabricated in 32 nm planar and 14 nm FinFET technologies is characterized and modeled for the first time. A high sensitivity and low noise detector is leveraged to measure emission at low voltages, including sub-threshold and linear regions that are extremely faint. Furthermore, the effect of device threshold is studied and...
A number system with radix-3 is referred to as Ternary system. With a lot of new ternary circuits being proposed as an alternative to the digital logic, we take a step further, in this paper we propose to design a Ternary coded Decimal (TCD) adder circuit based on CMOS technology. Unlike a Ternary adder, the TCD adder uses 3-bit Ternary coded Decimal (TCD) number as input and the resulting sum will...
We investigate the influence of additional dc current on response of CMOS THz detectors. A resistive self-mixing model calculation, shows that the voltage response of CMOS detectors increases significantly by applying a small dc current on the drain side of CMOS device. The calculation results are further verified by the experimental data from CMOS detectors at 0.65THz. The maximum voltage response...
In this paper we have developed an ultrafast pulse generator to turn on a Single Photon Avalanche Diode (SPAD) sensor with picosecond resolution, at specific time windows. The pulse amplitude and duration is user tunable to provide a variable excess bias voltage to the detector. The transition times (rise and fall time) of the pulse is in the range of 250 to 550 ps depending on the amplitude. The...
The use of delay locked loops (DLLs) for clock recovery is currently receiving an increased interest. Among the DLL types, the All-digital DLL is superior due to its tolerance towards power supply noise and PVT variations besides providing lesser locking time and technology portability. In this paper, All-Digital DLL based on register controlled delay line (RCDL) is designed for multi-phase clock...
The most commonly used pixel structure in integrated circuit technologies is the three-transistor pixel structure (3-T). This structure consists of a pixel, a reset transistor, a source follower and a pixel select transistor. An extension to this is the 4-T pixel structure where an extra transistor is included to enable current steering in the readout phase and reset phase. This greatly reduces current...
In this work, a new detection method for Terahertz (THz) radiation in a MOSFET transistor based on Thermionic Emission (TE) has been demonstrated. Theoretical analysis and experimental data have shown that under sub-threshold biasing conditions, the detection of THz signals from thermionic emission through a potential barrier between the highly doped source region and depleted channel region is far...
A current-assisted photonic sampler (CAPS) is presented, building on the principles of the current-assisted photonic demodulator (CAPD), but modified for high-speed gating applications such as time-resolved fluorescence-lifetime microscopy. This detector uses an internally applied electric field to move photo-generated electrons by fast drift to selected detection junctions to achieve nanosecond lifetime...
This paper proposes a fully-integrated 860-GHz terahertz wave sensor. The sensor integrates a terahertz detector and readout circuit in 180-nm standard CMOS process. The readout circuit consists of a low-noise instrumentation amplifier and a high-resolution AZ-ADC. Transmissive imaging without source modulation (no lock-in technique required) is realized using the sensor. The detector consists of...
Location estimation and navigation, especially on smartphones has shown great progress in the past decade due to its low cost and ability to work without additional infrastructure. However, a challenge is the positioning, both in terms of step detection, step length approximation as well as heading estimation, which must be accurate and robust, even when the use of the device is varied in terms of...
The design and characterization of a robust pulse generator power-on reset circuit, with accurate bandgap based thresholds, brown-out event detection capability and hysteresis, realized in 0.25 µm SiGe BiCMOS technology is presented. The resulting circuit consumes 7.5 µA and occupies 360×440nm2 area. Measured reset pulses longer than 340 µs are generated. The design was simulated with a voltage and...
An array of GaAs/InGaAs/AlGaAs field-effect transistors with an asymmetric T-gate in each transistor and floating electrodes was fabricated on a single chip and tested as a detector of terahertz (THz) radiation. Principle of detection was based on excitation of plasma oscillations in the common electron channel of the FETs array. Strong terahertz photovoltaic response was demonstrated without any...
In this work we propose the application of a radiation damage model based on the introduction of deep level traps/recombination centers suitable for device level numerical simulation of radiation detectors at very high fluences (e.g. 1÷2×1016 1-MeV equivalent neutrons per square centimeter) combined with a surface damage model developed by using experimental parameters extracted from measurements...
The effect of scintillator geometry on the quality of neutron/γ pulse shape discrimination (PSD) in EJ-299 plastic scintillator, using a digital charge integration PSD algorithm has been studied. It is shown that the PSD Figure of Merit (FOM) reduces as the geometry of the scintillator moves from a cube-like shape towards a flat panel shape. The PSD performance in this material at high flux irradiation...
CZT detectors have attracted much interest as room-temperature solid-state X-ray and gamma ray detectors due to their high energy resolution and high spatial resolution. Pixel CZT detectors are widely applied. However, the observed spectrum of a single pixel is distorted towards lower energies. The possible reasons for the spectral distortion may be carriers trapping, charge sharing with the adjacent...
SPECT is primarily used in the clinic for noninvasive cardiac myocardial perfusion imaging. However, sensitivity is impaired due to the need for collimation in SPECT. New second generation systems including those with multi-pinhole collimation has shown high sensitive acquisitions. This has enabled faster or lower dose “stress-first” acquisitions, but not both. Here a third generation dedicated Cardiac...
Depth-of-interaction (DOI) measurement is essential for PET to reduce the parallax error, which results in improved spatial resolution while maintaining the sensitivity. One of the ultimate goals for improvement of DOI detectors is achieving their isotopic spatial resolution. For this purpose, we have developed an isotropic 3D position-sensitive PET detector named the X'tal cube detector. The X'tal...
This study investigates the effect of energy threshold on being able to include and position multiple-interaction photon events (MIPEs) detected in a cadmium zinc telluride (CZT) based small animal PET system we have built. Due to noise fluctuations, each channel's data acquisition trigger threshold should be adjusted above the noise floor, which limits the detection of photon interactions with energy...
Energy resolution plays a major role in multitracer SPECT detectors, as spectral lines emitted by different radionuclides have to be distinguished. In the electronic circuit for the readout of SiPMs used in a SPECT system, the processing filter choice is therefore essential to provide the best achievable energy resolution. Gated integrator filter was identified as an excellent candidate for this kind...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.