Search

Three-port center-tapped spiral inductors are designed to achieve high performance with symmetrically octagonal twin shapes for a K-Band voltage-controlled oscillator (VCO) in 0.13 µm SiGe BiCMOS technology. The modeling of on-chip inductors includes a 3D physical model for actual chip fabrication and a double π equivalent circuit model for precise parameter extraction. Simulation results for the physical and circuit models agree closely. The total inductance is 300 pH with a high Q of 18 at the desired operating frequency of 20 GHz. A 20 GHz VCO for K-Band applications using 0.13 µm SiGe BiCMOS technology with a chip area of 0.22 mm² was built to verify the accuracy of the inductor modeling. The tuning range of the VCO was 2.21 GHz, from 19.9 to 22.11 GHz. At 20.89 GHz, the measured phase noise at 100 kHz and 1 MHz offset frequencies was -52.26 and -92.07 dBc/Hz, respectively. VCO power dissipation was 27 mW with a 1.5 V supply. [ABSTRACT FROM AUTHOR]

The article discusses the Amino Acid Enantiomers Using Capillary Electrophoresis and New Chiral Ligand's separation. Topics discussed include the ionic liquids also known as liquid organic which have many unique properties, the used of chirical ionic liquid as the chiral ligand for the enantioseparations of tryptophan (Trp) enantiomers, tyrosine (Tyr) enantiomers, and phenylalanine (Phe) enantiomers, and calculation of enantioseparation resolution (Rs) of enantiomers.