List of Articles instrumentation

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  1 - Design and ُSimulation of a New High CMRR, High Bandwidth and Low Power Current Mode Instrumentation Amplifier Based on FDCCII
  S.  Ahmadi S. J. Azhari
  In this paper a novel topology of CMIA based on FDCCII is proposed. Due to benefiting from current mode signal processing, unlike the most of the previously reported IAs, the proposed FDCCII based structure doesn't need well-matched resistors or active blocks to obtain More

  In this paper a novel topology of CMIA based on FDCCII is proposed. Due to benefiting from current mode signal processing, unlike the most of the previously reported IAs, the proposed FDCCII based structure doesn't need well-matched resistors or active blocks to obtain high CMRR and inherently can improve CMRR, bandwidth, power consumption and it has better frequency performances. On the other side, unlike other current mode types of this group, using fully differential structure decreases the mismatch effect in electronic blocks. Both of these advantages significantly reduced the structure size and power consumption while improving bandwidth and CMRR and makes it an excellent and an unbeatable choice for integration. In the proposed circuit, CMRR as the most important property of IA has been greatly improved by using a current subtracting stage. The CMIA has been designed using 0.18 um CMOS Technology under ±1 V supply voltages and the performance of the CMIA has been verified using HSPICE software in transistor level. The CMIA has achieved voltage CMRR of 227.4 dB, voltage CMRR bandwidth of 8.98 KHz, differential voltage gain bandwidth of 9.08 MHz and output offset voltage of 2.23 uV and the IA’s power dissipation is only 348 uW Manuscript profile
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  2 - Two- and three-dimensional modeling of leakage using instrumentation results in earthen dams
  amene fatehi ali aram
  Infiltration and water leakage are destructive phenomena that after the construction of earth dams can endanger the safety and stability of these structures. Numerous studies have been conducted on the numerical modeling of leakage currents from earth dams. The issue is More

  Infiltration and water leakage are destructive phenomena that after the construction of earth dams can endanger the safety and stability of these structures. Numerous studies have been conducted on the numerical modeling of leakage currents from earth dams. The issue is the seepage from the body and the foundation and its analysis. Leakage in earthen dams is unavoidable, but if there are suitable conditions for soil erosion, seepage will cause soil particles to be washed away in favorable places. Studies on a large number of destroyed earth dams have shown that about 38% of these damages were due to uncontrolled seepage from the dam body. By analyzing the results of instrumentation and numerical model, the accuracy of instrument information embedded in the dam can be ensured. Numerical methods can be a good, accurate and useful tool for modeling physical phenomena such as the movement and flow of water in porous deposits. Finally, the necessary solutions to determine the leakage path, water escape rate and other measures related to dam safety are suggested. Manuscript profile