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A K-band low voltage, highly linear Gilbert cell mixer is presented in this paper. The goal of this work is to achieve highest possible linearity when the supply voltage is as low as 2 V. The proposed low voltage mixer topology has been experimentally verified with a down conversion mixer fabricated in a 0.18-mum CMOS process. Utilizing PMOS devices in the transconductance stage and using a 2 V supply...
A significant increase in the speed of Si transistors has been achieved in recent years. Circuit forms that were previously applied to low frequency operation are now being realized in high frequency circuits. Therefore, low electrical power consumption and higher integration are becoming more advanced. We recognize that the essence of this drastic change in circuit technology is the conversion of...
This paper presents the design of a novel SiGe HBT voltage controlled oscillator (VCO) that uses a lumped-element transformer as the feedback network. The VCO design employs a filter-type transformer, as opposed to an inductive transformer, to improve both the power consumption and tuning range. Unlike for the conventional cross-coupled differential oscillator and the coupled-Colpitt's oscillator,...
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