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This paper presents a low-power down-conversion mixer for 3.1~4.8 GHz MB-OFDM UWB applications. The proposed mixer is based on folded double-balanced Gilbert cell and employs following techniques: two cross-coupling capacitors at the transconductance stage enhance conversion gain and reduce input noise; two choke inductors reduce flicker noise from the switch quad; tuning capacitors and resistors...
This paper presents the design of a 900 MHz LC oscillator implemented in 0.18 mum RF CMOS technology. Employing an on-chip PN varactor together with an on-chip spiral inductor, this voltage-controlled oscillator (VCO) achieves a simulated phase noise of - 100.9 dBc/Hz at a 100 kHz offset. The output frequency of the VCO can be tuned from 785 MHz to 955.6 MHz which correspond to 170.6 MHz tuning range,...
A low-power ultra-compact CMOS low-noise amplifier (LNA) in a shunt-resonating current-reused topology is presented. The common-source transistors are connected with a shunt-resonating inter-stage match network such that the bias current is shared to have low power consumption and RF signal is doubly amplified to have high gain and low noise figure. The implemented 0.18 mum CMOS LNA achieves 15.2...
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