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The design and implementation of an analog CMOS complex filter for ZigBee using IEEE 802.15.4 standard in SMIC 180nm technology is described. This fourth-order complex Butterworth filter bases upon transconductor-capacitor (Gm-C) structure, it has a bandwidth of 3 MHz and center frequency of 2 MHz. The filter provides 50dB image rejection and comsumes very low power which can meet the requirements...
This paper presents a 0.18 μm mixer merged with LNA exploiting noise cancellation technique. It operates between 100MHz and 1GHz. The Gilbert mixer is known for its perfect port isolation and bad noise performance. The transconductor stage of the mixer can be implemented by an LNA exploiting noise cancellation to have a better NF. The chip is implemented in SMIC 0.18μm CMOS technology. Measurement...
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