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This paper represents CMOS direct down-conversion mixer for L-band application based on 0.18 um CMOS technology. The proposed mixer uses current bleeding technique and common-mode feedback (CMFB) circuit. The transconductance stage PMOS transistors that concurrently amplify RF signal and bleed current offer reduction of current in the LO transistors while still maintain the mixer output voltage to...
5.5 GHz LC VCO is fabricated using 0.18 um CMOS process. And this paper presents the phase noise performance dependence on the tail current source transistor in standard CMOS technology. The LC VCO has the minimum point of frequency variation and the optimal selection of tail current at maximum 2nd-order generation can achieve good phase noise performance. By optimizing the tail current, we have achieved...
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