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An optical method is proposed to measure the input impedance of a microstructure in vivo operating at microwave frequencies. It makes use of the non-linearity of an AC-DC conversion circuit and encodes the received power level to the pulse rate of an LED which can be accurately measured by a photodiode outside the tissue medium. An accurate measurement of the characteristics of the power-receiving...
Knowledge of the external field distribution around high voltage apparatus is of vital importance. As a part of the effort to improve the physical understanding of the DC field distribution outside high voltage apparatus, a small probe that can measure DC electric fields has been developed and a first version of this probe has been tested. The probe is 26 mm long and 12 mm in diameter. It is designed...
Conventional ultrasonic C-scan imaging in composite materials typically employs peak amplitude extraction where the obtained image quality is extremely dependent on the gate setup on the ultrasonic acquisition hardware. Additionally structural noise created by scattering phenomenon is often high enough to bury meaningful reflection echoes, due to the non-homogeneous nature of such materials. This...
This paper describes a common framework of test chip design for logic technology development and routine process monitoring, referred to as a field-configurable test structure array (FC-TSA), which can accommodate and test various types of test structures including transistors, diodes, and resistors. To minimize the number of probe pads and maximize area utilization efficiency, a memory-addressing...
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