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Due to with the actuality of the task of interconnection of non-synchronously operating alternating current energy systems, an experimental comparison of the interconnection devices models, which implement various methods of operation of these devices, is required. Therefore, a stand is needed, that allows conducting experimental studies with the specified models of devices. The basis of the stand...
This paper aims toward joining the ideas of OBT (oscillation-based testing) and DFT (design for testability). It gives insight into an optimization process that provides testability if one chooses to use the OBT. The optimization procedure is exemplified on a timer device NE555. Utilization of a timer circuit allows avoidance of a specific design of the feed-back loop. The optimization procedure is...
A system and source joint estimation method for EM emission modeling is proposed in this paper. Based on the priori knowledge, i.e., the transfer function of system is smooth and the form of source signal was already known, the paper using joint estimation method to solve modeling problems when measured only the emission amplitude spectra at some ports. Experimental results verify the method could...
The physical radiated emission sources and main radiated structures of a Boost converter are identified according to equivalent radiation antenna in this paper. The turn-off voltage of MOSFET and the recovery current of diode are found as the sources for their oscillation frequencies are coincidence with radiation curve measured. The influence of the converter's metal enclosure is analyzed on two...
Self-injection locked oscillators have been recently proposed for motion sensing applications demonstrating a good experimental performance. Here a detailed investigation of the system dynamics is presented using a realistic model of the oscillator circuit under the injection of the reflected signal, which is phase modulated due to the target motion. The instability effects observed for some distance...
A comprehensive system for real-time monitoring of a set of cell-cultures using a Voltage Oscillation (VO) methodology is proposed. The main idea is to connect the bio-electrical elements (electrodes & cell-culture) in such a way that sequentially a suitable electrical oscillator, which only uses a DC power source, is built. Using the employed electrical models given in [1, 2], the attained oscillation...
A 75–110GHz (W band) high-Q tunable band pass filter is demonstrated. The band pass filter has low insertion loss, a Q of approximately 200 and can be tuned across the entire W waveguide band. This filter has a variety of uses including rejecting spurious signals generated from non-linear frequency multiplication and improving signal to noise ratio at the front end of a receiver. The tuning is achieved...
A quadrature oscillator based on two RC oscillators with capacitive coupling is proposed and analyzed. The capacitive coupling has the advantages of being noiseless and not increasing the power dissipation. Simulation results show that the oscillation frequency increases proportionally to the coupling capacitances, which is the opposite of what happens in capacitive coupled LC oscillators. Measurements...
In this paper we demonstrate the use of the augmented Harmonic Balance technique, otherwise used for RF power amplifier analysis, for stability analysis and characterisation of nonlinear CRLH TL circuits. Both Hopf and fliptype bifurcations were identified in a varactor loaded, 20-stage symmetric-π NL CRLH TL circuit. The parametric frequencies corresponding to the phase matching (three wave mixing)...
The paper proposes to stabilize the oscillation frequency through direct interaction of the Gunn diode with a whispering gallery mode (WGM) dielectric resonator (DR). The dimensions of a WGM resonator can be much larger than the operating wavelength, and therefore less sensitive to fabrication tolerances. In order to transmit the generated mm-wave signal to an external load, the structure is coupled...
A nonlinear beam-wave interaction has be built to simulate the BWO in Helical traveling wave tube, which is in the above of 1D beam-wave interaction model by field theory, And taking into account of angular speed which are affected by magnetic fields. The CN with different QC has be compared to equivalent circuit in small signal, that the result is close. Also, the simulated results are accorded with...
A model predicting the negative bias temperature instability (NBTI) reliability of high performance nitrided oxides is developed from discrete p-type metal-oxide-semiconductor field effect transistor (PMOSFET) data and verified with ring oscillator degradation in various frequencies for up to 1 GHz. Based on the experimental data and the simulation results, hole traps generation is considered to be...
This paper presents the design of a MMIC oscillator operating at a 45 GHz frequency. This circuit was fabricated by Alcatel-Thales III-V Lab with the new InP/GaAsSb/InP DHBT submicronic technology (We=700 nm). This transistor has a 15-μm-long two-finger emitter. The complete nonlinear modeling of heterojunction bipolar transistor used in this circuit is described. The interest of the methodology used...
Polymorphic gates can be considered as a new reconfigurable technology capable of integrating logic functions with sensing in a single compact structure. Polymorphic gates whose logic function can be controlled by the level of the power supply voltage (Vdd) represent a special class of polymorphic gates. A new polymorphic NAND/NOR gate controlled by Vdd is presented. This gate was fabricated and utilized...
In this paper, we present the latest advancements of short gate length InGaAs/InAlAs/InP high electron mobility transistor (InP HEMT) devices that have achieved extremely high extrapolated Fmax above 1 THz. The high Fmax is validated through the first demonstrations of sub-MMW MMICs (s-MMICs) based on these devices including the highest fundamental transistor oscillator MMIC at 347 GHz and the highest...
This paper presents modeling of manufacturing variability and body bias effect for subthreshold circuits based on measurement of a device array circuit in a 90 nm technology. The device array consists of P/NMOS transistors and ring oscillators. This work verifies the correlation between the variation model extracted from IV measurement results and oscillation frequencies, which means the transistor-level...
A voltage controlled oscillator (VCO) was designed for operation in C-band for use in a microwave point-to-point radio system. Microstrip technology was chosen for resonator implementation since it offers ease of manufacturing and frequency adjustment The design was performed using an electromagnetic (EM)-harmonic balance co-design technique in order to achieve first pass success. The measured frequency...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
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