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A linearity improvement technique is proposed on the design of low frequency (132 KHz center frequency, 40 KHz band frequency) power-line communication band-pass filter, which focus on the linearity of large R-MOSFET. In order to enhance the linearity of the triode-mode MOSFET variable resistors, driving the controlling voltages of the R-MOSFET in a resistor tuning schematic instead of the main signal...
A tunable power amplifier (PA) from 0.9 GHz to 3.0 GHz is presented. This paper proposes an output impedance tuning method by using resistive feedback and a parallel resonance consisting of an inductor and a tunable capacitor array. The proposed multi-band PA can adjust the output impedance to 50 ?? over a wide frequency range, so external isolators following PAs can be eliminated. The PA is implemented...
In this paper, a frequency tunable differential input differential output low noise amplifier (LNA), used for 3-5 GHz OFDM applications, is proposed and analyzed. The LNA has a wideband input matching and a tunable output matching. The digital controlled capacitor arrays in the output matching networks allow the LNA to be switched smoothly in the frequency range of 3 to 5 GHz with output return loss...
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