Research, design, fabrication and results of various screen printed capacitive humidity sensors is presented in this paper. As printing ink, commercially available silver nanoparticle-based conductive ink was used. The objective of the present work was to identify the most important factors affecting the material performances with humidity, and to contribute to the development of a sensor system supported with a Radio Frequency Identification (RFID) chip directly on the material, for use in smart packaging applications. Therefore, the authors built a passive and a battery-supported wireless module based on SL900A smart sensory tag’s IC to achieve UHF-RFID functionality with data logging capability.
COBISS.SI-ID: 10694484
The article offers a comparison of sensitivities for vapor trace detection of Trinitrotoluene (TNT) explosives of two different sensor systems: a chemo-mechanical sensor based on chemically modified Atomic Force Microscope (AFM) cantilevers based on Micro Electro Mechanical System (MEMS) technology with optical detection (CMO), and a miniature system based on capacitive detection of chemically functionalized planar capacitors with interdigitated electrodes with a comb-like structure with electronic detection (CE). Using CMO system, we can detect 300 molecules of TNT in 10+12 molecules of N2 carrier gas, whereas the CE system can detect three molecules of TNT in 10+12 molecules of carrier N2.
COBISS.SI-ID: 10678868
This article describes an effective, low-cost solution for sequential, one-time programming (OTP) and verification of zener diodes in an electronic micro-system. Using the proper structures of zener diodes (also known as ‘zener zap’) in a standard CMOS process, it is possible to achieve better accuracy in high-precision integrated circuits. For this purpose a solution has been developed for fast programming and programming verification of several zener zap structures on the ASIC (Application Specific Integrated Circuit). The entire zapping process for 250 zener zap structures is completed in the range of a few tens of milliseconds. This solution has been implemented for wafer sorting, and as well for packaged integrated circuits. It was successfully verified in the industrial production of more than ten million- high precision, electronic micro-systems with a remarkable overall yield of 97%.
COBISS.SI-ID: 10621780
The THz radiation brings new technology challenges and new opportunities to overcome some of the current application obstacles. In the paper portable THz system is presented operating at the room temperature. Presented solution is robust and inexpensive, convenient for many applications. The THz sensor fabricated on Faculty of Electrical Engineering in Laboratory for Microelectronics is currently one of the best sensors in its frequency operating range. It reaches sensitivity up to 1000V/W and NEP down to 5pW/√Hz in vacuum. With proposed system solution variety of application can be covered.
COBISS.SI-ID: 10453332
Approximation of the squaring function can lead to significant savings in hardware and processing time. Previously proposed approximations of the squaring function include LUT-based solutions, linear interpolation of the squaring function and minimization of combinational logic. This paper proposes approximation based on a simple logarithmic interpolation of a squaring function with a simple logic block, which can be reused for the error compensation. The proposed block performs approximation of the squaring function with a shift operation and a carry-free subtraction.
COBISS.SI-ID: 10373972