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This paper examines the influence of constructive parameters on gas filled surge arresters (GFSA) pre-breakdown current in gamma and X radiation fields. The observed effects on some commercial GFSAs have been compared to an originally developed GFSA model, with the aim of improving the characteristics of commercial components. The type of noble gas, the pressure in gas chamber, the inter-electrode...
Multi-scale approach based on physical, circuit and system levels for radiation effects modeling is considered. The model of low dose rate sensitivity of subthreshold leakage current is presented. Parameters for SPICE simulation can be obtained.
This work reports on an investigation of capacitance-voltage (C-V) and current-voltage (I-V) measurements on metal-oxide-semiconductor (MOS) capacitors and transistors under illumination. C-V characteristics under illumination differ considerably from those in dark due to an inversion of the substrate. The measurement frequency and illumination dependency has been investigated, a model has been introduced...
Some applications require correct computation, while many others do not. Large domain where perfect functional performance is not always required is in multimedia and DSP systems. Relaxing the requirement of 100% correctness for devices and interconnections may dramatically reduce costs of manufacturing, verification, and testing. The goal of this paper is development of error significance map for...
One DFT solution for systems on chip, based on IDDQ measuring concept is presented in this paper. The application of Reconfigurable neurai networks off chip enables also good diagnostics capabilities. The solution is to be implemented in few digital blocks of the tree phase power meter IC and realized using CMOS035 technology. The simulation results obtained using Cadence Virtuoso show good performances...
This paper presents a method and software for constructing of testabie finite state machines (FSM). The proposed method of impiementing test for FSM has severaf advantages in comparison with common soiutions. However, this method imposes some constraints on FSM synthesis process, which can be satisfied by using specific decomposition technique. The presented software environment (caifed D&S) is...
Different strategies for performing string lookups have been developed and deployed during the evolutionary scientific process. These are the results of both the development of technology and the need for improvement of previously existing solutions. Hence, the string lookup problem has been well studied and the respectful amount of good solutions is present. Due to nature of the problem, most of...
A rail-to-rail operational amplifier in 0.6 mum BiCMOS technology is presented. Two simple input signal adapters with floating outputs are introduced. They translate the input signals into the operating region of the differential amplifier, enabling rail-to-rail operation. An inverter-based rail-to-rail class AB output stage was used. With a bipolar supply of plusmn 0.75 V, the proposed rail-to-rail...
With the growing density of very large scale integrated (VLSI) circuits, traditional digital fault simulation is no longer a viable option. This is because of analogue-like behaviour in digital circuits. The need for fast fault simulation is one of the main requirements in test pattern generation. The trade off between accurate simulations at transistor level, as in SPICE and fast simulation at gate...
The need for an efficient interconnect architecture has been caused by continued increase of the required communication bandwidth and concurrency of small-scale digital systems. The issue of applying the code division multiple access (CDMA) technique for data transfer over peripheral bus are discussed in this paper. The proposed technique represents an efficient interconnection solution for implementation...
The early detection of pathogens in a solution sample using a biosensor and associated electronics manufactured in a mainstream semiconductor process is currently attracting much research and development interests around the globe. This is primarily because such a system will be low-cost, easily manufactured, and can offer very high sensitivities, thus potentially stopping the rapid spread of diseases...
For the first time we present high temperature electrical characteristics of the vertical Impact Ionization MOSFET. The design of this device suppresses efficiently leakage currents at high temperatures and therefore guarantees MOSFET functionality up to several hundred degC. At 250degC a very good IonToff ratio of 105 as well as leakage currents in the nA range are demonstrated. This makes this device...
Analog circuits based on subthreshold operation of CMOS devices are very attractive for ultra-low power, high gain and moderate frequency applications. The effect of dual material gate (DMG) on p-MOSFET for subthreshold analog operation is systematically investigated in this paper. As p- MOSFET plays a major role in CMOS circuits as active load, we simulated and studied the analog subthreshold performance...
The Si channel surface orientation dependence of electrical characteristics in ultra-thin EOT gate MOSFETs was reviewed. The excellent DC and RF performance were obtained in ultra-thin SiO2 gate p-MOSFETs with (110) oriented Si channel. The properties and electrical characteristics in n- and p- MOSFETs with 2 - 6 degree tilted off-axis (110) channel were also reported. The transconductance of p-MOSFET...
The DC stress induced device degradation of sequential lateral solidification (SLS) polysilicon thin film transistors (TFTs) was investigated by monitoring the threshold voltage in the linear regime of operation. Devices with different channel widths were compared. It was observed that the degradation of device parameters during hot carrier experiments was dependent on the channel width. The origin...
Both LBIV and LBIC methods (light beam induced voltage and light beam induced current) are based on measuring either short circuit current Isc or open circuit voltage Voc under conditions of local illumination by monochromatic light of a proper wavelength. By positioning the illuminated spot, a map of either Isc or Voc can be obtained, from which it is possible to find the distribution of the...
Properties of spry pyrolysed CdS layers were changed purposefully using annealing by a pulsed-laser in oxygen ambient. The structural, phase and electrical characteristics before and after annealing have been compared. The layer surface has been studied by SEM, XRD and XPS analyses. The electrical and optic parameters have been measured as well. Layers with different structure and electro-optical...
Modulators of terahertz (THz) range on the base of silicon integrated p-i-n-structures are investigated. The generalization of the Fletcher boundary conditions at the injecting electrodes has been put forward for the case of highly doped p++, n++ regions, where both forbidden gap narrowing and dependence of coefficients of diffusion on doping are taken into account. The problem of double injection...
Moisture-induced silver reactions have been identified as a fast degradation mechanism in commercial plastic packaged white LEDs, that passed a standard incoming lot inspection but resulted all degraded at the switching-on after mounting on the final boards. The source of the contaminant (Sulphur) is not explained by any part of the available history of the devices in the lot. Anyway, each one of...
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