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In this paper, we present an effecient new modal analysis which is needed to evaluate a 1-D periodic phased array planar structure excited by arbitrary located sources. The latest requires an accurate study that permits to analyze the modal input impedance in one unit cell with the proper current density appeared on the metal part including the source domain. The formulation that is proposed to solve...
A dB-linear programmable gain amplifier (PGA)utilizing weighted input transistors, is implemented in a 0.18 μm CMOS process. The weighed input transistor units with constant current-density enable insensitive gain-steps while maintaining the load impedance condition. The gain range can cover from -18 dB to +30 dB in 6 dB steps, and the gain error is less than 1 dB. The 3 dB bandwidth (BW) is 60 MHz...
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