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A bipolar junction transistor (BJT) based sensor is investigated for its sensing characteristics such as sensitivity and signal to noise ratio (SNR). The sensor consists of a bipolar transistor with its base connected to a sensing surface in contact with the solution. Measurements are performed using pH buffer solutions and the sensor sensitivity and signal to noise ratio are shown to be significantly...
This work presents one of the first low power pH sensing microfluidic chip based on the heterogeneous integration of: (i) high-k FinFET sensors with liquid gate, (ii) miniaturized Ag/AgCl quasi-Reference Electrode and (iii) passive microfluidic. The integration of these three components provides a fully integrated and compact platform that could be exploited for ionic monitoring in biofluids for healthcare...
Currently available sensor systems relying on multi-cantilever deflection detection by optical means are generally limited in their functionality by complexity and cost. Several laser sources as well as big sized detectors are needed to record the signal from each cantilever separately. In the frame of the ENIAC Joint Undertaking project Lab4MEMS II our group is currently developing a novel device...
The current-voltage (IV ) dependency of diodes close to the breakdown voltage is shown to be governed by Random Telegraph Signal (RTS) phenomena. We present a technology independent approach to accurately characterize the bias dependent statistical RTS properties and show that these can fully describe the steep IV -dependency in avalanche. The statistical properties also allow to more accurately describe...
Resistive random access memories based on redox phenomena (ReRAM) combine several advantages. Beside their good scalability, high endurance and fast switching speed they are also very energy efficient. This work presents a study of the SET kinetics of SrTiO3-based resistive switches covering the timescale from <10 ns up to 104 s. The power-dependence of the SET kinetics and the switching energy...
This paper presents an energy efficiency improvement methodology based on the use of additional static biasing instead of margins during design stage. While the impact of margins used to prevent unsystematic process limitations cannot be recovered after fabrication, using biasing anticipation offers the possibility to enable the degradation recovery only when it is required. A CAD study on ARM Cortex...
concretely aiming at the efficient millimeter-wave power generation for monolithically integrated design, the small-signal S-parameter characterization of the impact-ionization avalanche transit-time (IMPATT) diodes was presented in this work. By combining the measured S-parameter data both of the 40 × 2 µm2 IMPATT diode and different short ended coplanar waveguide (CPW) structures, a designing-by-characterizing...
Nonvolatile power-gating (NVPG) that is a power-gating architecture employing nonvolatile retention is expected as a highly efficient energy reduction technique for high-performance microprocessors and mobile/wearable SoC devices. In this paper, the NVPG architecture for SRAM is demonstrated. A 1kb nonvolatile SRAM (NV-SRAM) array with the peripheral circuits is implemented using 65nm silicon-on-thin-buried-oxide...
Building reliable mixed-signal circuits in advanced process technologies requires an accurate understanding of device performance and variability. This work presents an on-chip transistor characterization platform built on a digital focal plane array readout circuit framework that enables highly parallel device measurements to be taken in the digital domain. This technique is used to quickly assess...
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