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In this study, we propose an ultra-fast compliance current circuit for ReRAM electrical characterization. The circuit utilizes high speed components with low propagation delay and can reduce the overall response time to nanosecond level. Both simulated and measured results demonstrate that our proposed compliance current circuit possesses response time of ∼100ns, and thus can effectively reduce the...
For a PET insert to be placed inside an MR system, shielding for the detector modules is crucial as otherwise there can be mutual interference between the two modalities. In this work, we have assessed various shielding designs for both RF shielding effectiveness and gradient-induced eddy current performances. We designed six shielding configurations with various thicknesses, patterns and materials:...
Today more and more multifunction RF-SIP (System-In-Package) modules, in SMD (Surface-Mount-Technology) package style, come into high volume production phase. There are many challenges in automatic RF measurements of RF-SIP-SMD devices. Each different SIP must have dedicated load-board that contains multiple RF connectors as well as a rigorous RF considerations and design. Furthermore, RF test equipment...
A modeling concept for accurate prediction of 1/f-noise in millimeter wave Schottky detectors is presented. The concept is based on DC bias current measurements with precise knowledge of the diode structure. Key aspect is the distinction between DC and RF current distribution at the Schottky contact, specifically investigated on a quasi vertical diode structure.
In this paper we present the detection of sub-THzradiation at 220 GHz by using 0.35 µm AMS Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The design procedure and experimental setup are shown in order to design and characterize the MOSFETs photo response. The experiment and observation of photo response are measured against gate voltage with a drain current bias detraction at room temperature...
The estimation of 1 dB compression and third-order intercept points can be obtained after the cross-correlation between dynamic current and output voltage of radio frequency power amplifiers. Estimation is performed using power measures and not power inferred from voltage measures. The underlining theory and a correlator that allows implementing this measurement on-chip are presented. The trade-off...
For the rod shape measurement of hot rolled round steel bars (rods) the high frequency eddy current method is especially well suited as it requires no contact point and is not limited to below the Curie temperature. Defects of the rod's shape can be detected by measuring the impedance spectrum of the RLC-oscillator. In the first laboratory setup an Agilent impedance analyser was used for initial tests...
This paper highlights the achievement of constant efficiency (power added efficiency, PAE) across wide output power levels for fixed amplitude constant envelope modulation. Power amplifier drain supply is adjusted while having a fixed load impedance network. Input RF drive to the power amplifier has to change according to the output power in order to maintain the PAE across a wide range of power levels...
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