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DC, RF and noise parameters of GaAs pHEMTs with 100 nm gate length and widths (μm) of 2×10, 2×15, 2×25, 2×50, 2×75, 4×50 were investigated with the focus on test structure with gate width of 2 × 50 µm. Using a Maury Microwaves ATS system in the 8–50 (K, Ka), 50–75 (V) and 75–110 GHz (W) frequency band, the noise parameters were measured and calculated employing the Y-Factor method. The sources of...
Magnetoelectric sensor belongs to the passive piezo sensors based on the coupling between magnetic and electric energies or signals. There is great scientific interest at the moment in the magnetoelectric (ME) coupling; different ME materials and structures has been studied and proposed [1]. However most of previous study is focused on the magnetic field detection system with single ME sensor, and...
A micro-Pirani pressure sensor, which consists of a pressure dependent thermo-resistance gauge, is traditionally exploited using a steady state resistance measurement. Any signal variation occurs over a constant voltage bias due to the initial resistance of the device which affects the sensor's sensitivity. Our work shows for the first time an experimental investigation of a micro-Pirani gauge based...
In this paper, a low noise preamplifier used for a quartz-based gyro-meter is proposed. The preamplifier is based on charge amplifier. Unlike a traditional charge amplifier, which needs a high value of feedback resistance to stabilize its operation, the stability of the proposed preamplifier is ensured by resetting of the feedback capacitor periodically. As a result, the proposed preamplifier is simple...
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