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X-ray sensor applications in general need a high resolution, a high SNR, a low FPN and a low power consumption. Digital pixels with an ADC integrated in each pixel can satisfy not only aforementioned requirements but also a fast frame rate. Nyquist ADCs, however, have a large area to be implemented and thus need a sophisticated circuit design in order to operate properly. In the other hand, a sigma-delta...
We present an electro-photonic circuit integrated into a 65-nm DRAM periphery process. Its photonic circuit features 2-dB/mm waveguide, 7-dB grating coupler, 10-Gb/s modulator, and 5-Gb/s Ge photodiode.
The flux rate of cosmic rays incident on the Earth’s upper atmosphere is modulated by the solar wind and the Earth’s magnetic field. The amount of solar wind is not constant due to changes in solar activity in each solar cycle, and hence the level of cosmic ray modulation varies with solar activity. In this context, we have investigated the variability and the relationship of cosmic ray intensity...
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